TreeNode.Selected Property
Gets or sets a value that indicates whether the node is selected.
Assembly: System.Web (in System.Web.dll)
Use the Selected property to specify or determine whether the node is selected.
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Although the property can be used to determine whether the node is selected, it is more common to use the SelectedNode property. |
Only one node can be selected at a time in the TreeView control when using this property.
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As an alternative, you can also select the node by using the Select method. |
The value of this property is stored in view state.
The following code example demonstrates how to use the Selected property to select a node in the TreeView control.
<%@ Page Language="C#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> void Button_Command(Object sender, CommandEventArgs e) { // Iterate through the child nodes of the root node and find // the nodes for Chapter One and Chapter Two. foreach(TreeNode node in LinksTreeView.Nodes[0].ChildNodes) { // Select the appropriate node based on which button was clicked. switch(node.Text) { case "Chapter One": // If the button clicked was "Chapter One", select the node // using the Selected property. if (e.CommandName == "Chapter One") { // Select the node using the Selected property. node.Selected = true; } break; case "Chapter Two": // If the button clicked was "Chapter Two", select the node // using the Select method. if (e.CommandName == "Chapter Two") { // Select the node using the Select method. node.Select(); } break; default: // Do nothing. break; } } } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>TreeNode Selected and Select() Example</title> </head> <body> <form id="form1" runat="server"> <h3>TreeNode Selected and Select() Example</h3> <asp:TreeView id="LinksTreeView" Font-Names= "Arial" ForeColor="Blue" SelectedNodeStyle-BackColor="Yellow" ExpandDepth="2" runat="server"> <LevelStyles> <asp:TreeNodeStyle ChildNodesPadding="10" Font-Bold="true" Font-Size="12pt" ForeColor="DarkGreen"/> <asp:TreeNodeStyle ChildNodesPadding="5" Font-Bold="true" Font-Size="10pt"/> <asp:TreeNodeStyle ChildNodesPadding="5" Font-UnderLine="true" Font-Size="10pt"/> <asp:TreeNodeStyle ChildNodesPadding="10" Font-Size="8pt"/> </LevelStyles> <Nodes> <asp:TreeNode Text="Table of Contents"> <asp:TreeNode Text="Chapter One" Selected="True"> <asp:TreeNode Text="Section 1.0"> <asp:TreeNode Text="Topic 1.0.1"/> <asp:TreeNode Text="Topic 1.0.2"/> <asp:TreeNode Text="Topic 1.0.3"/> </asp:TreeNode> <asp:TreeNode Text="Section 1.1"> <asp:TreeNode Text="Topic 1.1.1"/> <asp:TreeNode Text="Topic 1.1.2"/> <asp:TreeNode Text="Topic 1.1.3"/> <asp:TreeNode Text="Topic 1.1.4"/> </asp:TreeNode> </asp:TreeNode> <asp:TreeNode Text="Chapter Two"> <asp:TreeNode Text="Section 2.0"> <asp:TreeNode Text="Topic 2.0.1"/> <asp:TreeNode Text="Topic 2.0.2"/> </asp:TreeNode> </asp:TreeNode> </asp:TreeNode> <asp:TreeNode Text="Appendix A" /> <asp:TreeNode Text="Appendix B" /> <asp:TreeNode Text="Appendix C" /> </Nodes> </asp:TreeView> <br /><br /> <asp:Button id="SelectChapterOneButton" Text="Select Chapter One" CommandName="Chapter One" OnCommand="Button_Command" runat="server"/> <asp:Button id="SelectChapterTwoButton" Text="Select Chapter Two" CommandName="Chapter Two" OnCommand="Button_Command" runat="server"/> </form> </body> </html>
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
