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TreeNodeBindingCollection.RemoveAt Method

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

Removes the TreeNodeBinding object at the specified index location from the TreeNodeBindingCollection object.

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

public void RemoveAt (
	int index
)
public void RemoveAt (
	int index
)
public function RemoveAt (
	index : int
)

Parameters

index

The zero-based index location of the TreeNodeBinding to remove.

Use the RemoveAt method to remove the TreeNodeBinding object located at index from a TreeNodeBindingCollection object. All items that follow that node are then moved up to fill the vacant position. The indexes of the moved items are also updated.

As an alternative, you can remove a specific TreeNodeBinding object by using the Remove method. You can also remove every node in the collection by using the Clear method.

The following code example demonstrates how to use the RemoveAt method to remove a TreeNodeBinding object programmatically from a TreeNodeBindingCollection object. For this example to work correctly, you must copy the XML data that is located at the end of this section to a file called Book.xml.


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

<script runat="server">

  void Page_Load(Object sender, EventArgs e)
  {

    // Use the RemoveAt method to remove the TreeNodeBinding object 
    // for the third-level nodes (index 2).
    BookTreeView.DataBindings.RemoveAt(2);

    // Create a new TreeNodeBinding object and set its properties.
    TreeNodeBinding newBinding = new TreeNodeBinding();
    newBinding.DataMember = "Section";
    newBinding.TextField = "Subject";

    // Use the Insert method to insert the TreeNodeBinding object 
    // into the DaaBindings collection at index 2.
    BookTreeView.DataBindings.Insert(2, newBinding);

  }

</script>

<html>
  <body>
    <form runat="server">
    
      <h3>TreeNodeBindingCollection Insert and RemoveAt Example</h3>
    
      <asp:TreeView id="BookTreeView" 
        DataSourceID="BookXmlDataSource"
        runat="server">
         
        <DataBindings>
          <asp:TreeNodeBinding DataMember="Book" TextField="Title"/>
          <asp:TreeNodeBinding DataMember="Chapter" TextField="Heading"/>
          <asp:TreeNodeBinding DataMember="Section" TextField="Heading"/>
        </DataBindings>
         
      </asp:TreeView>
      
      <asp:XmlDataSource id="BookXmlDataSource"  
        DataFile="Book.xml"
        runat="server">
      </asp:XmlDataSource>
    
    </form>
  </body>
</html>


The following is the XML data for the preceding code example.

<Book Title="Book Title">
    <Chapter Heading="Chapter 1">
        <Section Heading="Section 1"
            Subject="Subject 1">
        </Section>
        <Section Heading="Section 2"
            Subject="Subject 1">
        </Section>
    </Chapter>
    <Chapter Heading="Chapter 2">
        <Section Heading="Section 1"
            Subject="Subject 1">
        </Section>
    </Chapter>
</Book>

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
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