TreeNodeEventArgs.Node Property

Note: This property is new in the .NET Framework version 2.0.

Gets the node that raised the event.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

public TreeNode Node { get; }
/** @property */
public TreeNode get_Node ()

public function get Node () : TreeNode

Property Value

A TreeNode that represents the node that raised the event.

Use the Node property to access the properties of the node that raised the event. The Node property returns a TreeNode object and is commonly used to determine the contents of the node, to modify the properties of the node, or to add child nodes dynamically.

The following code example demonstrates how to use the Node property to determine the text value of an expanded node.

<%@ Page Language="C#" %>

<script runat="server">

  void Node_Expand(Object sender, TreeNodeEventArgs e)

    Message.Text = "You expanded the " + e.Node.Text + " node.";


  void Node_Collapse(Object sender, TreeNodeEventArgs e)

    Message.Text = "You collapsed the " + e.Node.Text + " node.";




    <form runat="server">
      <h3>TreeView TreeNodeExpand and TreeNodeCollapse Example</h3>
      <asp:TreeView id="BookTreeView"
          <asp:TreeNode Value="Chapter 1" 
            Text="Chapter 1">
            <asp:TreeNode Value="Section 1"
              Text="Section 1">
              <asp:TreeNode Value="Paragraph 1" 
                Text="Paragraph 1">
            <asp:TreeNode Value="Section 2" 
              Text="Section 2">
      <asp:Label id="Message" runat="server"/>


Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0