TreeNode.Depth Property

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets the depth of the node.

public:
 property int Depth { int get(); };

[System.ComponentModel.Browsable(false)]
public int Depth { get; }

[<System.ComponentModel.Browsable(false)>]
member this.Depth : int

Public ReadOnly Property Depth As Integer

Property Value

Int32

The depth of the node.

Attributes: BrowsableAttribute

Examples

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.

ASP.NET (C#)


<%@ 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>


<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub Data_Bound(ByVal sender As Object, ByVal e As TreeNodeEventArgs)

    ' 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 Then

      e.Node.Checked = True

    Else

      e.Node.Checked = False

    End If

  End Sub

</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>

Remarks

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.

Applies to

Продукт	Версії
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

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