RadTreeView.Net2 Gets or sets the data member to bind to a menu item. When creating a RadMenuItemBinding object, you must specify the criteria for binding. The criteria indicate when a data item should be bound to a menu item. You can specify the Depth property, the DataMember property, or both. When the data source contains multiple elements or tables, use the DataMember property to specify the element or table to bind to a menu item. A data member specifies the type of the data item in the underlying data source, but can represent different information depending on the data source. Each data item in a hierarchical data source exposes a IHierarchyData.Type property, which specifies the type of the data item. For example, the data member for an XML element specifies the name of the element. The following RadMenuItemBinding declaration binds the <Book> elements of an XmlDataSource control to all the menu items in the menu, regardless of the location in the hierarchy: 
            <asp:RadMenuItemBinding DataMember="Book" TextField="Title" ValueField= "ISBN">
Sometimes you might need to create a menu item binding that specifies both a depth and a data member. This is often used when the data source contains items at different levels that have the same data member value. For example, you can have <Item> elements that appear at different levels within an XML file. The following RadMenuItemBinding declarations show how to specify menu item bindings that apply to identical data members at different menu depths: <asp:RadMenuItemBinding DataMember="Item" Depth="1" TextField="Title"> <asp:RadMenuItemBinding DataMember="Item" Depth="2" TextField="ISBN"> If a menu item binding is defined without a depth or a data member, the menu item binding is applied to all menu items within the menu. This is commonly used when all data items have the same properties and should be displayed identically, regardless of the menu depth. After the binding criteria are established, you can then bind a property of a RadMenuItem object that can be bound to a value. You can bind to a field of a data item or to a static value. When bound to a static value, all RadMenuItem objects to which the RadMenuItemBinding object is applied share the same value. Properties bound to fields contain the values of the field from the data source. If conflicting RadMenuItemBinding objects are defined, the Menu control applies the menu item bindings in the following order of precedence: The RadMenuItemBinding object that defines and matches both a depth and a data member. The RadMenuItemBinding object that defines and matches the data member only. The RadMenuItemBinding object that defines and matches the depth only. The RadMenuItemBinding object that defines neither the depth nor the data member. (This type of menu item binding is applied to all menu items in the menu.) The RadMenuItemBinding object that does not have a match in the data source. In this case, the value returned by the ToString() method of the data item is then bound to the Text and Value properties of the menu items to which the RadMenuItemBinding object is applied. Gets or sets the text caption for the item. The text of the item. The default value is empty string. This example demonstrates how to set the text of the item using the Text property. <radM:RadMenu ID="RadMenu1" runat="server">
<Items>
<radM:RadMenuItem Text="News" />
<radM:RadMenuItem Text="News" />
</Items>
</radM:RadMenu> Specifying Text or TextField will override the values populated from the DataTextField property. Gets or sets the name of the field from the data source to bind to the Text property of a RadMenuItem object to which the RadMenuItemBinding object is applied. The name of the field from the data source to bind to the Text of a RadMenuItem to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. Specifying Text or TextField will override the values populated from the DataTextField property. Gets or sets the value associated with the item. The value associated with the item. The default value is empty string. Use the Value property to specify or determine the value associated with the item. Specifying Value or ValueField will override the values populated from the DataValueField property. Gets or sets the name of the field from the data source to bind to the Value property of a RadMenuItem object to which the RadMenuItemBinding object is applied. The name of the field from the data source to bind to the Value of a RadMenuItem to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. Specifying Value or ValueField will override the values populated from the DataValueField property. Gets or sets the URL to link to when the item is clicked. The URL to link to when the item is clicked. The default value is empty string. The following example demonstrates how to use the NavigateUrl property <radM:RadMenu id="RadMenu1" runat="server">
<Items>
<radM:RadMenuItem Text="News" NavigateUrl="~/News.aspx" />
<radM:RadMenuItem Text="External URL" NavigateUrl="http://www.example.com" />
</Items>
</radM:RadMenu> Use the NavigateUrl property to specify the URL to link to when the item is clicked. Use "~" (tilde) in front of an URL within the same ASP.NET application. When specifying external URL do not forget the protocol (e.g. "http://"). Specifying NavigateUrl or NavigateUrlField will override the values populated from the DataNavigateUrlField property. Gets or sets the name of the field from the data source to bind to the NavigateUrl property of a RadMenuItem object to which the RadMenuItemBinding object is applied. The name of the field from the data source to bind to the NavigateUrl of a RadMenuItem to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. Specifying %NavigateUrl:NavigateUrl% or NavigateUrlField will override the values populated from the DataNavigateUrlField property. Gets or sets the ToolTip text for a menu item to which the RadMenuItemBinding object is applied. The ToolTip text for a menu item to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. Gets or sets the name of the field from the data source to bind to the ToolTip property of a RadMenuItem object to which the RadMenuItemBinding object is applied. The name of the field from the data source to bind to the ToolTip of a RadMenuItem to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. Gets or sets the URL to an image that is displayed next to the text of a menu item to which the RadMenuItemBinding object is applied. The URL to an image that is displayed next to the text of a menu item to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. This image is shared with all RadMenuItem objects to which the RadMenuItemBinding object is applied. NOTE: You can override the image for an individual menu item by setting its ImageUrl property directly. Instead of using this property to display the same image in each menu item, you can also use the ImageUrlField property to bind the ImageUrl property of a RadMenuItem object to a field of a data source. When rendered, the ImageUrl property of each menu item to which the RadMenuItemBinding object is applied contains the corresponding value from the field. NOTE: If the ImageUrl and ImageUrlField properties are both set, the ImageUrlField property takes precedence. You can override the image for an individual menu item by setting its ImageUrl property directly. Gets or sets the name of the field from the data source to bind to the ImageUrl property of a RadMenuItem object to which the RadMenuItemBinding object is applied. The name of the field from the data source to bind to the ImageUrl of a RadMenuItem to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. If the data source contains multiple tables or attributes, you must first establish the binding criteria by setting the Depth property, the DataMember property, or both. Instead of using this property to bind the ImageUrl property of a RadMenuItem object to a field, you can also bind it to a static value by setting the RadMenuItemBinding.ImageUrl property. This allows you to display the same image in each menu item to which the RadMenuItemBinding object is applied. NOTE: If the ImageUrl and ImageUrlField properties are both set, the ImageUrlField property takes precedence. Gets or sets the path to an image to display for the item when the user moves the mouse over the item. The path to the image to display when the user moves the mouse over the item. The default value is empty string. <radm:RadMenu id="RadMenu1" runat="server">
<Items>
<radm:RadMenuItem ImageUrl="~/Img/inbox.gif" ImageExpandedUrl="~/Img/inboxOver.gif" Text="Index" />
<radm:RadMenuItem ImageUrl="~/Img/outbox.gif" ImageExpandedUrl="~/Img/outboxOver.gif" Text="Outbox" />
</Items>
</radm:RadMenu> Use the ImageExpandedUrl property to specify the image that will be used when the user moves the mouse over the item. If the ImageExpandedUrl property is set to empty string the image specified by the ImageUrl property will be used. Use "~" (tilde) when referring to images within the current ASP.NET application. Gets or sets the name of the field from the data source to bind to the ImageExpandedUrl property of a RadMenuItem object to which the RadMenuItemBinding object is applied. The name of the field from the data source to bind to the ImageExpandedUrl of a RadMenuItem to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. Gets or sets the target window or frame to display the Web page content linked to when the menu item is clicked. The target window or frame to load the Web page linked to when the Item is selected. Values must begin with a letter in the range of a through z (case insensitive), except for the following special values, which begin with an underscore: _blank Renders the content in a new window without frames. _parent Renders the content in the immediate frameset parent. _self Renders the content in the frame with focus. _top Renders the content in the full window without frames. The default value is empty string. Use the Target property to specify the frame or window that displays the Web page linked to when the menu item is clicked. The Web page is specified by setting the NavigateUrl property. If this property is not set, the Web page specified by the NavigateUrl property is loaded in the current window. The following example demonstrates how to use the Target property ASPX: <radM:RadMenu runat="server" ID="RadMenu1"> <Items> <radM:RadMenuItem Target="_blank" NavigateUrl="http://www.google.com" /> </Items> </radM:RadMenu> Gets or sets the name of the field from the data source to bind to the Target property of a RadMenuItem object to which the RadMenuItemBinding object is applied. The name of the field from the data source to bind to the Target of a RadMenuItem to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. Gets or sets a value indicating whether the menu item is enabled. Use the Enabled property to specify or determine whether a menu item is functional. When set to false, the item appears dimmed. Gets or sets the name of the field from the data source to bind to the Enabled property of a RadMenuItem object to which the RadMenuItemBinding object is applied. The name of the field from the data source to bind to the Enabled of a RadMenuItem to which the RadMenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set. Gets or sets the menu depth to which the RadMenuItemBinding object is applied. When creating a RadMenuItemBinding object, you must specify the criteria for binding. The criteria indicate when a data item should be bound to a menu item. You can specify the Depth property, the DataMember property, or both. Use the Depth property to specify the menu depth at which to apply the RadMenuItemBinding object. For example, the following RadMenuItemBinding declaration binds the Name and ID fields of the data source to the Text and Value properties, respectively, of all menu items with a depth of 0: 
            <asp:RadMenuItemBinding Depth="0" TextField="Name" ValueField="ID">
Sometimes you might need to create a menu item binding that specifies both a depth and a data member. This is often used when the data source contains items at different levels that have the same data member value. For example, you can have
<Item> elements that appear at different levels within an XML file. The following RadMenuItemBinding declarations show how to specify menu item bindings that apply to identical data members at different menu depths: 
            		
            			<asp:RadMenuItemBinding DataMember="Item" Depth="1" TextField="Title">
            		
            	
            		
            			<asp:RadMenuItemBinding DataMember="Item" Depth="2" TextField="ISBN">
If a menu item binding is defined without a depth and a data member, the menu item binding is applied to all menu items within the menu. This is commonly used when all data items have the same properties and should be displayed identically, regardless of the menu depth. After the binding criteria are established, you can then bind a property of a RadMenuItem object that can be bound to a value. You can bind to a field of a data item or to a static value. When bound to a static value, all RadMenuItem objects to which the RadMenuItemBinding object is applied share the same value. Properties bound to fields contain the values of the field from the data source. If conflicting RadMenuItemBinding objects are defined, the Menu control applies the menu item bindings in the following order of precedence: The RadMenuItemBinding object that defines and matches both a depth and a data member. The RadMenuItemBinding object that defines and matches the data member only. The RadMenuItemBinding object that defines and matches the depth only. The RadMenuItemBinding object that defines neither the depth nor the data member. (This type of menu item binding is applied to all menu items in the menu.) The RadMenuItemBinding object that does not have a match in the data source. In this case, the value returned by the ToString() method of the data item is then bound to the Text and Value properties of the menu items to which the RadMenuItemBinding object is applied. Gets or sets the string that specifies the display format for the text of a menu item to which the RadMenuItemBinding object is applied. RadTreeView Gets the component's current version. Gets or sets a value indicating whether to use the embedded JavaScript files or not. True if embedded JavaScript files are to be used; otherwise false. The default value is true. Use this property for debugging purposes or to apply any modifications to the JavaScript files. Defines properties that menu item containers (RadTreeView, RadTreeNode) should implement Gets the parent IMenuItemContainer. Gets the collection of child items. A RadTreeNodeCollection that represents the child items. Use this property to retrieve the child items. You can also use it to programmatically add or remove items. Constructor Internal method. Should not be invoked directly. Internal method. Should not be invoked directly. Internal method. Should not be invoked directly. Gets the current state of RadTreeView as XML string. XML String Gets the current state of RadTreeView's context menus as XML string. XML String Populates RadTreeView from XML String. The string Populates ContextMenus from XML String The string Populates RadTreeView from XML content File at runtime. The location of the file. Inherited from WebControl. Inherited from WebControl Inherited from WebControl Returns the first instance of the node (RadTreeNode) with the specified Value or null if no node is found. Returns the first instance of the node (RadTreeNode) with the specified Text or null if no node is found. This method returns the node, whose attributes collection contains the specified paramethers. This methods clears the selected nodes of the current RadTreeView instance. Useful when you need to clear node selection after postback. This methods clears the checked nodes of the current RadTreeView instance. Useful when you need to clear check selection after postback. Expands all nodes in the tree. Collapses all nodes in the tree. Gets a linear ArrayList of ALL nodes in the current treeview instance. ArrayList of ALL Nodes Gets a collection of RadTreeNode objects that represents the root nodes in the RadTreeView control. Use the Nodes property to get a RadTreeNodeCollection object that contains all the root nodes in the tree. This collection is commonly used to quickly iterate through all the root nodes, or to access a specific root node in the tree. Note:
A typical tree structure has only one root node; however, you can add multiple root nodes to the TreeView control. The Nodes property can also be used to manage the root nodes in the tree programmatically. You can add, insert, remove, and retrieve RadTreeNode objects from the collection. Any updates to the collection are automatically reflected in the RadTreeView control after the next round trip to the server. To access the child nodes of a root node, use the Nodes property of the node. Use the ChildNodes property of each subsequent parent-level node to navigate down the node levels. eThe event that fires upon node click. The event that fires upon node drag and drop. The event that fires upon treeview context click The event that is fired upon Node binding. The event that is fired upon Node creating. The event that fires upon node expanding. The event that fires upon node collapsing. Fires only for server-side load on demand (ExpandMode = ExpandMode.ServerSide) The event that fires when a node text has been edited (and changed) client-side. The event that fires when a node text has been checked. Gets a collection of RadTreeNode objects that represent the nodes in the control that display a selected check box. An ArrayList collection of the checked nodes. When check boxes are displayed in the RadTreeView control (by setting the CheckBoxes property to true), use the CheckedNodes property to determine which nodes display a selected check box. This collection is commonly used to iterate through all the nodes that have a selected check box in the tree. If the AutoPostBackOnCheck property of the tree is set to true, the NodeCheck event is raised when the check boxes of the RadTreeView control change state between posts to the server. This allows you to provide an event-handling method that performs a custom routine, such as updating a database or the displayed content, whenever this event occurs. Note:
The CheckedNodes collection is populated using a depth-first traversal of the tree structure: each parent node is processed down to its child nodes before the next parent node is populated. Protected Sub ShowCheckedNodes(ByVal sender As Object, ByVal e As System.EventArgs) Dim message As String = String.Empty Dim nodeCollection As ArrayList = RadTree1.CheckedNodes Dim node As RadTreeNode For Each node In nodeCollection message += node.FullPath Next node nodes.Text = message End Sub protected void ShowCheckedNodes(object sender, System.EventArgs e) { string message = string.Empty; ArrayList nodeCollection = RadTree1.CheckedNodes; foreach (RadTreeNode node in nodeCollection) { message += node.FullPath + "<br/>"; } nodes.Text = message; } Gets a collection of RadTreeNode objects that represent the nodes in the control that are currently selected. An ArrayList collection of the selected nodes. This collection is commonly used to iterate through all the nodes that have been selected in the tree. If the AutoPostBack property is set to true, the NodeClick event is raised when end-users select a node in the RadTreeView control. This allows you to provide an event-handling method that performs a custom routine, such as updating a database or the displayed content, whenever this event occurs. Note:
The SelectedNodes collection is populated using a depth-first traversal of the tree structure: each parent node is processed down to its child nodes before the next parent node is populated. Gets a RadTreeNode object that represents the selected node in the RadTreeView control. The text of a node in the RadTreeView control can be in one of three modes: default (none), selection (postback) mode and navigation mode. To put a node into navigation mode, set the Href property for the node to a value other than an empty string (""). To put a node into selection mode, set the AutoPostBack of the treeview to true (sets postback mode for all tree nodes) or set the PostBack property of any node to true. When a node is in selection mode, the user can select a node by clicking on the text in the node. Use the SelectedNode property to determine which node is selected in the TreeView control. Note:
A node cannot be selected when the TreeView control displays hyperlinks. When hyperlinks are displayed, the SelectedNode property always returns a null reference (Nothing in Visual Basic). When the user selects a different node in the RadTreeView control by clicking the text in the new node, the NodeClick event is raised, by default. If you set the MultipleSelect property of the treeview to true, end-users can select multiple nodes by holding the Ctrl / Shift keys while selecting. <radT:RadTreeView ID="RadTree1" runat="server" AutoPostBack="True" OnNodeClick="NodeClick" /> Protected Sub NodeClick(ByVal sender As Object, ByVal NodeEventArgs As RadTreeNodeEventArgs) info.Text = String.Empty Dim NodeClicked As RadTreeNode = NodeEventArgs.NodeClicked info.Text = NodeClicked.Text End Sub <radT:RadTreeView ID="RadTree1" runat="server" AutoPostBack="True" OnNodeClick="NodeClick" /> protected void NodeClick(object sender, RadTreeNodeEventArgs NodeEventArgs) { info.Text = string.Empty; RadTreeNode NodeClicked = NodeEventArgs.NodeClicked; info.Text = NodeClicked.Text; } Gets a value indicating whether the RadTreeView control has no nodes. Gets or sets the object from which the data-bound control retrieves its list of data items. RadTreeView fully supports binding to IList datasources (DataSet, DataTable), so you can easily populate your treeview instance with only a few lines of code. The built-in data binding supports auto-binding from a a single self-referencing table with ID -> ParentID relation.

Properties and methods related to data binding:

DataSource - (mandatory) object. Set to an instance of a DataSet or a DataTable
DataMember - (optional) string. If the DataSource is a DataSet and DataMember is set, then RadTreeView assumes the DataTable with the respective name in the DataSet. Otherwise the first DataTable in the DataSet is used.
DataFieldID - (mandatory) string. The name of the DataColumn holding the ID value;
DataFieldParentID - (mandatory) string. The name of the DataColumn holding the ParentID value; DataTextField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Text property. DataValueField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Value property.
DataBind() - (mandatory) menthod. Call this method after you've set the aforementioned properties per your scenario. Dim dbCon As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")) dbCon.Open() Dim adapter As New OleDbDataAdapter("SELECT * FROM Links", dbCon) Dim ds As New DataSet() adapter.Fill(ds) RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID" RadTree1.DataFieldParentID = "ParentID" RadTree1.DataSource = ds RadTree1.DataBind() OleDbConnection dbCon = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")); dbCon.Open(); OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT * FROM Links", dbCon); DataSet ds = new DataSet(); adapter.Fill(ds); RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID"; RadTree1.DataFieldParentID = "ParentID"; RadTree1.DataSource = ds; RadTree1.DataBind(); RadTree1.ExpandAllNodes(); RadTreeView fully supports binding to IList datasources (DataSet, DataTable), so you can easily populate your treeview instance with only a few lines of code. The built-in data binding supports auto-binding from a a single self-referencing table with ID -> ParentID relation.

Properties and methods related to data binding:

DataSource - (mandatory) object. Set to an instance of a DataSet or a DataTable
DataMember - (optional) string. If the DataSource is a DataSet and DataMember is set, then RadTreeView assumes the DataTable with the respective name in the DataSet. Otherwise the first DataTable in the DataSet is used.
DataFieldID - (mandatory) string. The name of the DataColumn holding the ID value;
DataFieldParentID - (mandatory) string. The name of the DataColumn holding the ParentID value; DataTextField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Text property. DataValueField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Value property.
DataBind() - (mandatory) menthod. Call this method after you've set the aforementioned properties per your scenario. Gets or sets the specific data member in a multimember data source to bind to a data listing control. Dim dbCon As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")) dbCon.Open() Dim adapter As New OleDbDataAdapter("SELECT * FROM Links", dbCon) Dim ds As New DataSet() adapter.Fill(ds) RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID" RadTree1.DataFieldParentID = "ParentID" RadTree1.DataSource = ds RadTree1.DataBind() OleDbConnection dbCon = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")); dbCon.Open(); OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT * FROM Links", dbCon); DataSet ds = new DataSet(); adapter.Fill(ds); RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID"; RadTree1.DataFieldParentID = "ParentID"; RadTree1.DataSource = ds; RadTree1.DataBind(); RadTree1.ExpandAllNodes(); Gets or sets the field name from a data source to bind to the RadTreeNode Text property. RadTreeView fully supports binding to IList datasources (DataSet, DataTable), so you can easily populate your treeview instance with only a few lines of code. The built-in data binding supports auto-binding from a a single self-referencing table with ID -> ParentID relation.

Properties and methods related to data binding:

DataSource - (mandatory) object. Set to an instance of a DataSet or a DataTable
DataMember - (optional) string. If the DataSource is a DataSet and DataMember is set, then RadTreeView assumes the DataTable with the respective name in the DataSet. Otherwise the first DataTable in the DataSet is used.
DataFieldID - (mandatory) string. The name of the DataColumn holding the ID value;
DataFieldParentID - (mandatory) string. The name of the DataColumn holding the ParentID value; DataTextField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Text property. DataValueField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Value property.
DataBind() - (mandatory) menthod. Call this method after you've set the aforementioned properties per your scenario. Dim dbCon As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")) dbCon.Open() Dim adapter As New OleDbDataAdapter("SELECT * FROM Links", dbCon) Dim ds As New DataSet() adapter.Fill(ds) RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID" RadTree1.DataFieldParentID = "ParentID" RadTree1.DataSource = ds RadTree1.DataBind() OleDbConnection dbCon = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")); dbCon.Open(); OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT * FROM Links", dbCon); DataSet ds = new DataSet(); adapter.Fill(ds); RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID"; RadTree1.DataFieldParentID = "ParentID"; RadTree1.DataSource = ds; RadTree1.DataBind(); RadTree1.ExpandAllNodes(); Gets or sets the field name from a data source to bind to the RadTreeNode Value property. RadTreeView fully supports binding to IList datasources (DataSet, DataTable), so you can easily populate your treeview instance with only a few lines of code. The built-in data binding supports auto-binding from a a single self-referencing table with ID -> ParentID relation.

Properties and methods related to data binding:

DataSource - (mandatory) object. Set to an instance of a DataSet or a DataTable
DataMember - (optional) string. If the DataSource is a DataSet and DataMember is set, then RadTreeView assumes the DataTable with the respective name in the DataSet. Otherwise the first DataTable in the DataSet is used.
DataFieldID - (mandatory) string. The name of the DataColumn holding the ID value;
DataFieldParentID - (mandatory) string. The name of the DataColumn holding the ParentID value; DataTextField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Text property. DataValueField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Value property.
DataBind() - (mandatory) menthod. Call this method after you've set the aforementioned properties per your scenario. Dim dbCon As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")) dbCon.Open() Dim adapter As New OleDbDataAdapter("SELECT * FROM Links", dbCon) Dim ds As New DataSet() adapter.Fill(ds) RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID" RadTree1.DataFieldParentID = "ParentID" RadTree1.DataSource = ds RadTree1.DataBind() OleDbConnection dbCon = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")); dbCon.Open(); OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT * FROM Links", dbCon); DataSet ds = new DataSet(); adapter.Fill(ds); RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID"; RadTree1.DataFieldParentID = "ParentID"; RadTree1.DataSource = ds; RadTree1.DataBind(); RadTree1.ExpandAllNodes(); Gets or sets the field name from a data source to determine the ID of the nodes to bind. RadTreeView fully supports binding to IList datasources (DataSet, DataTable), so you can easily populate your treeview instance with only a few lines of code. The built-in data binding supports auto-binding from a a single self-referencing table with ID -> ParentID relation.

Properties and methods related to data binding:

DataSource - (mandatory) object. Set to an instance of a DataSet or a DataTable
DataMember - (optional) string. If the DataSource is a DataSet and DataMember is set, then RadTreeView assumes the DataTable with the respective name in the DataSet. Otherwise the first DataTable in the DataSet is used.
DataFieldID - (mandatory) string. The name of the DataColumn holding the ID value;
DataFieldParentID - (mandatory) string. The name of the DataColumn holding the ParentID value; DataTextField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Text property. DataValueField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Value property.
DataBind() - (mandatory) menthod. Call this method after you've set the aforementioned properties per your scenario. Dim dbCon As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")) dbCon.Open() Dim adapter As New OleDbDataAdapter("SELECT * FROM Links", dbCon) Dim ds As New DataSet() adapter.Fill(ds) RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID" RadTree1.DataFieldParentID = "ParentID" RadTree1.DataSource = ds RadTree1.DataBind() OleDbConnection dbCon = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")); dbCon.Open(); OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT * FROM Links", dbCon); DataSet ds = new DataSet(); adapter.Fill(ds); RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID"; RadTree1.DataFieldParentID = "ParentID"; RadTree1.DataSource = ds; RadTree1.DataBind(); RadTree1.ExpandAllNodes(); Gets or sets the field name from a data source to determine the parent ID of the nodes to bind. RadTreeView fully supports binding to IList datasources (DataSet, DataTable), so you can easily populate your treeview instance with only a few lines of code. The built-in data binding supports auto-binding from a a single self-referencing table with ID -> ParentID relation.

Properties and methods related to data binding:

DataSource - (mandatory) object. Set to an instance of a DataSet or a DataTable
DataMember - (optional) string. If the DataSource is a DataSet and DataMember is set, then RadTreeView assumes the DataTable with the respective name in the DataSet. Otherwise the first DataTable in the DataSet is used.
DataFieldID - (mandatory) string. The name of the DataColumn holding the ID value;
DataFieldParentID - (mandatory) string. The name of the DataColumn holding the ParentID value; DataTextField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Text property. DataValueField (optional) - Gets or sets the field name from a data source to bind to the RadTreeNode Value property.
DataBind() - (mandatory) menthod. Call this method after you've set the aforementioned properties per your scenario. Dim dbCon As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")) dbCon.Open() Dim adapter As New OleDbDataAdapter("SELECT * FROM Links", dbCon) Dim ds As New DataSet() adapter.Fill(ds) RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID" RadTree1.DataFieldParentID = "ParentID" RadTree1.DataSource = ds RadTree1.DataBind() OleDbConnection dbCon = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~/TreeView/Data/Tree.mdb")); dbCon.Open(); OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT * FROM Links", dbCon); DataSet ds = new DataSet(); adapter.Fill(ds); RadTree1.DataTextField = "TextColumn" RadTree1.DataValueField = "ValueColumn" RadTree1.DataFieldID = "ID"; RadTree1.DataFieldParentID = "ParentID"; RadTree1.DataSource = ds; RadTree1.DataBind(); RadTree1.ExpandAllNodes(); Gets or sets the loading message that is displayed when child nodes are retrieved on AJAX calls. This property can be used for localization purposes (e.g. "Loading..." in different languages). Protected Sub LoadingMessagePositionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Select Case LoadingMessagePos.SelectedItem.Value Case "Before" RadTree1.LoadingMessagePosition = LoadingMessagePosition.BeforeNodeText RadTree1.LoadingMessageCssClass = "LoadingMessageBlue" RadTree1.LoadingMessage = "(loading ..)" Case "After" RadTree1.LoadingMessagePosition = LoadingMessagePosition.AfterNodeText RadTree1.LoadingMessageCssClass = "LoadingMessageBlue" RadTree1.LoadingMessage = "(loading ...)" Case "Below" RadTree1.LoadingMessagePosition = LoadingMessagePosition.BelowNodeText RadTree1.LoadingMessageCssClass = "LoadingMessage" RadTree1.LoadingMessage = "(loading ...)" Case "None" RadTree1.LoadingMessagePosition = LoadingMessagePosition.None End Select End Sub protected void LoadingMessagePositionChanged(object sender, System.EventArgs e) { switch (LoadingMessagePos.SelectedItem.Value) { case "Before" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.BeforeNodeText; RadTree1.LoadingMessageCssClass = "LoadingMessageBlue"; RadTree1.LoadingMessage = "(loading ..)"; break; case "After" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.AfterNodeText; RadTree1.LoadingMessageCssClass = "LoadingMessageBlue"; RadTree1.LoadingMessage = "(loading ...)"; break; case "Below" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.BelowNodeText; RadTree1.LoadingMessageCssClass = "LoadingMessage"; RadTree1.LoadingMessage = "(loading ...)"; break; case "None" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.None; break; } } Gets or sets the Css class name that is applied to the loading message when child nodes are retrieved on AJAX calls. Protected Sub LoadingMessagePositionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Select Case LoadingMessagePos.SelectedItem.Value Case "Before" RadTree1.LoadingMessagePosition = LoadingMessagePosition.BeforeNodeText RadTree1.LoadingMessageCssClass = "LoadingMessageBlue" RadTree1.LoadingMessage = "(loading ..)" Case "After" RadTree1.LoadingMessagePosition = LoadingMessagePosition.AfterNodeText RadTree1.LoadingMessageCssClass = "LoadingMessageBlue" RadTree1.LoadingMessage = "(loading ...)" Case "Below" RadTree1.LoadingMessagePosition = LoadingMessagePosition.BelowNodeText RadTree1.LoadingMessageCssClass = "LoadingMessage" RadTree1.LoadingMessage = "(loading ...)" Case "None" RadTree1.LoadingMessagePosition = LoadingMessagePosition.None End Select End Sub protected void LoadingMessagePositionChanged(object sender, System.EventArgs e) { switch (LoadingMessagePos.SelectedItem.Value) { case "Before" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.BeforeNodeText; RadTree1.LoadingMessageCssClass = "LoadingMessageBlue"; RadTree1.LoadingMessage = "(loading ..)"; break; case "After" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.AfterNodeText; RadTree1.LoadingMessageCssClass = "LoadingMessageBlue"; RadTree1.LoadingMessage = "(loading ...)"; break; case "Below" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.BelowNodeText; RadTree1.LoadingMessageCssClass = "LoadingMessage"; RadTree1.LoadingMessage = "(loading ...)"; break; case "None" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.None; break; } } Gets or sets the position of the loading message when child nodes are retrieved on AJAX calls. Protected Sub LoadingMessagePositionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Select Case LoadingMessagePos.SelectedItem.Value Case "Before" RadTree1.LoadingMessagePosition = LoadingMessagePosition.BeforeNodeText RadTree1.LoadingMessageCssClass = "LoadingMessageBlue" RadTree1.LoadingMessage = "(loading ..)" Case "After" RadTree1.LoadingMessagePosition = LoadingMessagePosition.AfterNodeText RadTree1.LoadingMessageCssClass = "LoadingMessageBlue" RadTree1.LoadingMessage = "(loading ...)" Case "Below" RadTree1.LoadingMessagePosition = LoadingMessagePosition.BelowNodeText RadTree1.LoadingMessageCssClass = "LoadingMessage" RadTree1.LoadingMessage = "(loading ...)" Case "None" RadTree1.LoadingMessagePosition = LoadingMessagePosition.None End Select End Sub protected void LoadingMessagePositionChanged(object sender, System.EventArgs e) { switch (LoadingMessagePos.SelectedItem.Value) { case "Before" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.BeforeNodeText; RadTree1.LoadingMessageCssClass = "LoadingMessageBlue"; RadTree1.LoadingMessage = "(loading ..)"; break; case "After" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.AfterNodeText; RadTree1.LoadingMessageCssClass = "LoadingMessageBlue"; RadTree1.LoadingMessage = "(loading ...)"; break; case "Below" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.BelowNodeText; RadTree1.LoadingMessageCssClass = "LoadingMessage"; RadTree1.LoadingMessage = "(loading ...)"; break; case "None" : RadTree1.LoadingMessagePosition = LoadingMessagePosition.None; break; } } Gets or sets the sort order of the tree nodes in RadTreeView. RadTreeView supports node sorting. The only thing you need to do is to set the Sort property of RadTreeView to one of the following values:
- Ascending
- Descending
- None
Please, take into account that the treeview sorts the nodes just prior to content rendering on screen, not upon node adding / removing from the collection. Protected Sub SortOrderChanged(ByVal sender As Object, ByVal e As System.EventArgs) Select Case SortOrder.SelectedItem.Value Case "Ascending" RadTree1.Sort = RadTreeViewSort.Ascending Case "Descending" RadTree1.Sort = RadTreeViewSort.Descending Case Else RadTree1.Sort = RadTreeViewSort.None End Select End Sub protected void SortOrderChanged(object sender, System.EventArgs e) { switch (SortOrder.SelectedItem.Value) { case "Ascending" : RadTree1.Sort = RadTreeViewSort.Ascending; break; case "Descending" : RadTree1.Sort = RadTreeViewSort.Descending; break; default: RadTree1.Sort = RadTreeViewSort.None; break; } } Gets a value indicating whether the text of the tree nodes are editable in the browser. End-users can edit the text of tree-nodes by pressing F2 when the node is selected or by clicking on a node that is already selected (slow double click). You can disable / enable node editing for specific tree nodes by setting the EditEnabled property of the specific RadTreeNode.
After node editing, RadTreeView fires the NodeEdit event and you can change the text of the node - the RadTreeNode instance is contained in the NodeEdited property of the event arguments and the new text is in the NewText property of the event arguments. <radT:RadTreeView ID="RadTree1" Runat="server" AllowNodeEditing="True" OnNodeEdit="HandleNodeEdit" /> Protected Sub HandleNodeEdit(ByVal sender As Object, ByVal NodeEvents As RadTreeNodeEventArgs) Dim nodeEdited As RadTreeNode = NodeEvents.NodeEdited Dim newText As String = NodeEvents.NewText nodeEdited.Text = newText End Sub <radT:RadTreeView ID="RadTree1" Runat="server" AllowNodeEditing="True" OnNodeEdit="HandleNodeEdit" /> protected void HandleNodeEdit(object sender, RadTreeNodeEventArgs NodeEvents) { RadTreeNode nodeEdited = NodeEvents.NodeEdited; string newText = NodeEvents.NewText; nodeEdited.Text = newText; } Gets or sets the value controlling the duration of the expand animation effect on collapse / expand. The default value is 2. Set the property to 0 to disable the animation effect on expand / collapse. Gets a value indicating whether the dotted lines indenting the nodes should be displayed or not. Gets a value indicating whether only the current branch of the treeview is expanded. The property closes all nodes that are not parents of the last expanded node. This property is only effective on the client browser - in postback modes you need to handle the logic yourself. The full location (path + filename) of the XML content file used to populate the menu. Gets or sets the base URL which the AJAX calls will be made to. the base URL which the AJAX calls will be made to. The AjaxUrl might need to be different on different usage scenarios. For example it is good to set it to Request.CurrentExecutionFilePath when using a Server.Transfer(). The full location (path + filename) of the XML content file used to populate the menu. The directory where image files used in the treeview reside (path relative to application root) When set to true all treenodes automatically generate server-event (postback). When set to true all the checkboxes generate server-event (postback) upon click. When set to true displays a checkbox next to each treenode. When set to true the treeview allows multiple node selection (by holding down ctrl key while selecting nodes) When set to true enables drag-and-drop functionality When set to true enables drag-and-drop visual clue (underline) between nodes while draggin Triggers both client and server side validation before posting back and firing user event-handlers. The name of the Javascript function the will be called upon focus on the treeview. The function must accept one parameter - the instance of the treeview that receives the focus. The name of the Javascript function that will be called upon click on a treenode. The function must accept a single parameter which is the instance of the node clicked. For example if you define OnClientClick="ProcessClientClick", you must define a javascript function defined in the following way (example):

function ProcessClientClick(node) { alert("You clicked on: " + node.Text); } The name of the Javascript function that will be called when the user highlights a treenode. Accepts a single parameter - the instance of the node highlighted. The name of the Javascript function that will be called when the user double clicks on a node. The name of the Javascript function that will be called after the user highlights a treenode. Accepts a single parameter - the instance of the node highlighted. The name of the Javascript function that will be called after the user edits a node Accepts three parameters, The name of the Javascript function that will be called when the user toggles (expand/collapse) a treenode.. The function must accept a single parameter which is the instance of the node clicked. For example if you define OnClientToggle="ProcessClientToggle", you must define a javascript function defined in the following way (example):

function ProcessClientToggle(node) { alert("You toggled: " + node.Text); } The name of the Javascript function that will be called when the user toggles (expand/collapse) a treenode. Receives a single parameter - the instance of the toggled node. The name of the Javascript function that will be called when the user drops a node onto another node. The function must accept two parameters - instances of source and destination nodes. For example if you define BeforeClientDrop="ProcessClientDrop", you must define a javascript function defined in the following way (example):

function ProcessClientDrop(sourceNode, destNode) { alert("You dropped " + sourceNode.Text + " onto " + destNode.Text); } The name of the Javascript function that will be called after the user drops a node onto another node. The function must accept two parameters - instances of source and destination nodes. For example if you define AfterClientDrop="ProcessClientDrop", you must define a javascript function defined in the following way (example):

function ProcessClientDrop(sourceNode, destNode) { alert("You dropped " + sourceNode.Text + " onto " + destNode.Text); } The name of the Javascript function that will be called before the user starts dragging a node. The function must accept one parameters - instance of the node being dragged. The function must return true if the action should be performed or false if you want to cancel dragging of this node. function ProcessClientDrag(sourceNode) { alert("You started dragging "); } The name of the Javascript function that will be called when the before the user clicks on a context menu item. The custom javascript function must accept two parameter - the instance of the node for which a context menu was displayed and the text of the context menu item that was selected. function ContextMenuClick(node, itemText) { status = "Context Menu Item " +itemText + " clicked for node "+ node.Text; } The name of the Javascript function that will be called when the before the user checks (checkbox) a treenode. The name of the Javascript function that will be called when the after the user checks (checkbox) a treenode. The name of the Javascript function that will be called when the user moves a mouse while dragging a node. Receives two parements - the instance of the node being dragged, and client-side browser events. Gets or sets the relative path of the folder containing the skins. If the skin folder is located in the project root and is named "Skins" the SkinsPath property should be set to: "~/Skins". Then you can create subfolders for individual skins e.g. Skins/Gold, Skins/Classic etc. A string specifying the relative path to the folder which contains RadTreeView skins. The default value is "~/RadControls/TreeView/Skins". RadTreeView ships with a set of predefined skins which are ready to use. They are located in RadControls/TreeView/Skins. Instructs the treeview to auto-scroll to the selected node after postback Note: This property is new in the .NET Framework version 2.0. Gets or sets the name of the validation group to which this validation control belongs. The name of the validation group to which this validation control belongs. The default is an empty string (""), which indicates that this property is not set. This property works only when CausesValidation is set to true. Gets or sets the URL of the page to post to from the current page when a tab from the tabstrip is clicked. The URL of the Web page to post to from the current page when a tab from the tabstrip control is clicked. The default value is an empty string (""), which causes the page to post back to itself. Gets a value indicating whether the page request is the result of a TreeView callback. if (!Page.IsPostBack && !RadTreeView1.IsCallBack) { // your init code here } If Not Page.IsPostBack AndAlso RadTreeView1.IsCallBack 'your init code here End If IsCallBack can be used to skip heavy initialization code. On TreeView callback, Page.IsPostBack is false and code inside If Not Page.IsPostBack block gets executed too. You can skip that by adding the RadTreeView.IsCallBack check. The delegate defining all RadTreeView Events. Summary description for ControlBuilderForm. Clean up any resources being used. Required method for Designer support - do not modify the contents of this method with the code editor. The editor for the RadTreeView items. The Windows form that hosts the RadTreeView editor. This enumeration controls the expand behaviour of the nodes. The default behaviour - all nodes are loaded in the intial request and expand is performed on the client, without server interaction Forces firing of the NodeExpand event - a postback occurs and developers can populate the node with its children in server side event handler Forces firing of the NodeExpand event asyncronously from the client without postback - the NodeExpand event fires and child nodes added to the node collection are automatically transferred to the client without postback. Specifies where the loading message is shown when Client-side load on demand is used. If the node text is "Some Text", the text is changed to "(loading ...) Some Text" when child nodes are being loaded (Assuming the LoadingMessage property has been set to "(loading...)"; If the node text is "Some Text", the text is changed to "Some Text (loading ...)" when child nodes are being loaded (Assuming the LoadingMessage property has been set to "(loading...)"; The text is not changed and (loading ...)" when child nodes are being loaded (Assuming the LoadingMessage property has been set to "(loading...)"; No loading text is displayed at all. The Telerik.WebControls.RadTreeViewSort enumeration supports three values - None, Ascending, Descending. Default is None. Nodes are not sorted at all. Nodes are sorted in ascending order (min to max) Nodes are sorted in descending order (max to min) Utility class for Design - Time VisualStudio.NET project management. Defines the common property categories' names Summary description for ContextMenu. Collection containing all items (of type ContextMenuItem) for the particular ContextMenu instance Constructor. The name of the ContextMenu - this uniquely identifies the menu and you can assign ContextMenus to different tree nodes by setting the ContextMenuName property of the node to the name of the ContextMenu. You can explicitly set width for the ContextMenu. Summary description for RadTreeNodeContextMenuItem. Constructor. Constructor. The text of the Context Menu item. Text of the item. The value of Text is displayed in the browser. Left-side image if you want images in your context menu. If set to true, fire a postback, firing the ContextMenuItemClick event. If false (default) no postback will occur. ID of the value - this might be helpful in some scenarios, for example multi-lingual context menus, where the item cannot be uniquely identified by its name. Represents a single TreeNode in the RadTreeView class. The RadTreeView control is made up of a hierarchy of TreeNodes represented by RadTreeNode objects. TreeNodes at the top level (level 0) that do not have a parent TreeNode are called root or top-level TreeNodes. A TreeNode that has a parent TreeNode is called a subTreeNode. All root TreeNodes are stored in the Nodes collection of the RadTreeView. SubTreeNodes are stored in a parent TreeNode's Nodes collection. You can access a TreeNode's parent TreeNode by using the Parent property. To create the TreeNodes for a RadTreeView control, use one of the following methods: Use declarative syntax to create static TreeNodes. Use a constructor to dynamically create new instances of the RadTreeNode class. These RadTreeNode objects can then be added to the Nodes collection of their parent. Bind RadTreeView control to a data source. When the user clicks a TreeNode, the RadTreeView control can either navigate to a linked Web page or simply post back to the server. If the NavigateUrl property of a TreeNode is set, the RadTreeView control navigates to the linked page. By default, a linked page is displayed in the same window or frame as the RadTreeView control. To display the linked content in a different window or frame, use the Target property. Each TreeNode has a Text and a Value property. The value of the Text property is displayed in the RadTreeView control, while the Value property is used to store any additional data about the TreeNode. Toggles Expand/Collapse state of the node. Expands all child nodes of the node. Expands all parent nodes of the node. Collapses recursively all child nodes of the node. Expands all parent nodes of the node. Returns the full path (location) of the node delimited by the specified character. The character to use as a delimiter Returns the full path of the node delimited by the specified character. The parent RadTreeNode. Null if there's no parent (root node). Custom CSS class applied only on the current node. Overrides NodeCssClass from the parent RadTreeView. Custom CSS class applied only on the current node when the mouse hovers the node. Overrides NodeCssClassOver from the parent RadTreeView. Custom CSS class applied only on the current node. Overrides NodeCssClassSelect from the parent RadTreeView. The text the the node displays on screen. Can be used to store information that is available both on client and server side. Can be used to distinguish between different categories of nodes. For example some nodes may belong to category "Country", others to "Continent", etc. Using the property makes it easier to find which category the current node belongs to on both client and server side. Displays a hint popup information when the user points the node with the mouse. If WindowsXP Narrator is turned on, it will read the text on the tooltip which is an importat requirement of Section 508 (government requirement for building software that can be used by people with disabilities) Optional image that is displayed before the text of the node. Optional. Should be used only when is specified. The image displayed when the node is expanded. This property is being used internally by the RadTreeView control. Setting it may lead to unpredictable results. The ID property is used internally. Use the Value property to store any item related data. Manages the item level of a particular Item instance. This property allows easy implementation/separation of the menu items in levels. Retrieves the index of the TreeNode within the parent The property is read-only. The URL the user is redirected to when he/she clicks on the node. Remember to add "http://" in front of links that lead outside your website. Specifies the name of the target frame for Href redirection. Supports "blank" for opening the specified Href in a new window. Sets the expanded/collapsed state of a tree-node that contains child nodes. If checkbox mode is turned on, this property shows whether the node is checked or not. If the parent RadTreeView has its CheckBoxes property set to true, RadTreeView automatically displays a checkbox next to each node. You can set this property to false for nodes that do not need to display a checkbox. If the current node is selected. By default, only one node can be selected, however you can enable multiple node selection by setting the MultipleSelect attribute of the parent RadTreeView to true. Enables / disabled the ability to drag this node. Enables / disabled the ability to drop nodes over this node. Enables / disabled the ability to edit a node. The context menu name that will be opened when end-users right-click the node. When set the ExpandMode.ServerSide will fire a server event (NodeExpand) so you can populate the node on demand. A Section 508 element - applied Gets the previous node sibling in the tree structure or returns null if this is the first node in the respective node group. Gets the next node sibling in the tree structure or returns null if this is the last node in the respective node group. Returns the full path (location) of the node delimited with slashes. For example if the current node has a Text attribute "Houston", its parent node has a Text attribute "Texas" and its parent (root) node has a Text attribute "U.S.A", FullPath will return "U.S.A/Texas/Houston" A collection of RadTreeNode objects in a RadTreeView control. The RadTreeNodeCollection class represents a collection of RadTreeNode objects. The RadTreeNode objects in turn represent menu items within a RadTreeView control. Use the indexer to programmatically retrieve a single RadTreeNode from the collection, using array notation. Use the Count property to determine the total number of menu items in the collection. Use the Add method to add menu items in the collection. Use the Remove method to remove menu items from the collection. Initializes a new instance of the RadTreeNodeCollection class. Use the constructor to create a new RadTreeNodeCollection class. The owner of the collection. Appends a RadTreeNode to the end of the collection. The following example demonstrates how to programmatically add items in a RadTreeView control. RadTreeNode newsItem = new RadTreeNode("News"); RadTreeView1.Nodes.Add(newsItem); Dim newsItem As RadTreeNode = New RadTreeNode("News") RadTreeView1.Nodes.Add(newsItem) Adds the items in an array of RadTreeNode objects to the collection. Use the AddRange method to add the items in the array of RadTreeNode objects specified by the items parameter. This allows you to add multiple RadTreeNode objects to the collection in a single step. The following example demonstrates how to use the AddRange method to add multiple items in a single step. void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { RadTreeNode[] items = new RadTreeNode[] { new RadTreeNode("First"), new RadTreeNode("Second"), new RadTreeNode("Third") }; RadTreeView1.Nodes.AddRange(items); } } Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not Page.IsPostBack Then Dim items() As RadTreeNode = {New RadTreeNode("First"), New RadTreeNode("Second"), New RadTreeNode("Third")} RadTreeView1.Nodes.AddRange(items) End If End Sub Inserts the specified RadTreeNode in the collection at the specified index location. Use the Insert method to add a RadTreeNode to the collection at the index specified by the index parameter. The location in the collection to insert the RadTreeNode. The RadTreeNode to add to the collection. Determines the index value that represents the position of the specified RadTreeNode in the collection. The zero-based index position of the specified RadTreeNode in the collection. Use the IndexOf method to determine the index value of the RadTreeNode specified by the item parameter in the collection. If an item with this criteria is not found in the collection, -1 is returned. A RadTreeNode to search for in the collection. Determines whether the collection contains the specified RadTreeNode. true if the collection contains the specified item; otherwise, false. Use the Contains method to determine whether the RadTreeNode specified by the item parameter is in the collection. A RadTreeNode to search for in the collection. Removes the specified RadTreeNode from the collection. Use the Remove method to remove a RadTreeNode from the collection. The following example demonstrates how to programmatically remove a RadTreeNode from a RadTreeView control. RadTreeNode newsItem = RadTreeView1FindTabByText("News"); if (newsItem != null) { RadTreeView1.Nodes.Remove(newsItem); } Dim newsItem As RadTreeNode = RadTreeView1FindTabByText("News") If Not newsItem Is Nothing Then RadTreeView1.Nodes.Remove(newsItem) End If Removes the RadTreeNode at the specified index from the collection. Use the RemoveAt method to remove the RadTreeNode at the specified index from the collection. The index of the RadTreeNode to remove. Removes all items from the collection. Use the Clear method to remove all items from the collection. The Count property is set to 0. Searches the RadTreeNodeCollection for the first RadTreeNode with a Text property equal to the specified value. A RadTreeNode whose Text property is equal to the specified value. The method returns the first item matching the search criteria. If no item is matching then null (Nothing in VB.NET) is returned. The value to search for. Searches the RadTreeNodeCollection for the first RadTreeNode with a Value property equal to the specified value. A RadTreeNode whose Value property is equal to the specified value. The method returns the first item matching the search criteria. If no item is matching then null (Nothing in VB.NET) is returned. The value to search for. Searches the RadTreeNodeCollection for the first Item with a NavigateUrl property equal to the specified value. A Item whose NavigateUrl property is equal to the specified value. The method returns the first Item matching the search criteria. If no Item is matching then null (Nothing in VB.NET) is returned. The value to search for. Gets a RadTreeNode at the specified index in the collection. Use this indexer to get a RadTreeNode from the collection at the specified index, using array notation. The zero-based index of the RadTreeNode to retrieve from the collection. Used to retrieve the node that was clicked in the browser and generated the postback. Typically used in user event handlers that handle the NodeClick event. Used to retrieve the source node of the NodeDrop event. Used to retrieve the destination node of the NodeDrop event. The drop position of the source node regarding the destination node - over (default), above, below. Used to retrieve the last node that has been bound. Used to retrieve the currently created item; Used to retrieve the the node that has been edited; Used to retrieve the the node that has been checked. Used to retrieve the the new text of the edited node; The text of the context menu item that was clicked The ID of the context menu item that was clicked The ID of the Html element the node was dropped over. The DataRow corresponding to the Node being bound. Constructor. Constructor. Summary description for RadTreeViewImages. Summary description for XmlParser.