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TreeNode.Depth Property

Gets the depth of the node.

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

[BrowsableAttribute(false)]
public int Depth { get; }

Property Value

Type: System.Int32
The depth of the node.

Use the Depth property to determine the depth of the node. The depth represents the number of levels of hierarchy between a node and the root node. For example, a root node has a depth of zero. A child of the root node has a depth of one, and so on.

The following code example demonstrates how use the Depth property to determine the depth of a node. It initializes all nodes with a depth of one to a selected state. For this example to work correctly, you must copy the sample XML data below to a file named Newsgroup.xml.



<%@ 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 Data_Bound(Object sender, TreeNodeEventArgs e)
  {

    // Check the depth of a node as it is being bound to data.
    // Initialize the Checked property to true if the depth is 1.
    if(e.Node.Depth == 1)
    {

      e.Node.Checked = true;

    }
    else
    {

      e.Node.Checked = false;

    }

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Checked Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>TreeNode Checked Example</h3>

      <asp:TreeView id="NewsgroupTreeView" 
        DataSourceID="NewsgroupXmlDataSource"
        OnTreeNodeDataBound="Data_Bound"
        ShowCheckBoxes="All"
        ExpandDepth="2"  
        runat="server">

        <DataBindings>
          <asp:TreeNodeBinding DataMember="category" TextField="Name"/>
          <asp:TreeNodeBinding DataMember="group" TextField="Name"/>
        </DataBindings>

      </asp:TreeView>

      <asp:XmlDataSource id="NewsgroupXmlDataSource"  
        DataFile="Newsgroup.xml"
        runat="server">
      </asp:XmlDataSource>

    </form>
  </body>
</html>



The following code is sample XML data for the previous example.

<category name="news.microsoft.com">
    <group name="microsoft.public.dotnet.framework.aspnet"/>
    <group name="microsoft.public.dotnet.framework.aspnet.mobile"/>
    <group name="microsoft.public.dotnet.framework.aspnet.webservices"/>
</category>

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

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.

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