TreeNodeBindingCollection.Item Property (Int32)

 
System_CAPS_noteNote

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Gets or sets the TreeNodeBinding object at the specified index in the TreeNodeBindingCollection object.

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

public TreeNodeBinding this[
	int i
] { get; set; }

Parameters

i
Type: System.Int32

The zero-based index of the TreeNodeBinding to retrieve.

Property Value

Type: System.Web.UI.WebControls.TreeNodeBinding

The TreeNodeBinding at the specified index in the TreeNodeBindingCollection.

Use the Item indexer to access a TreeNodeBinding object from the TreeNodeBindingCollection object located at i using array notation. The Item indexer allows you to modify or replace a TreeNodeBinding object in the collection directly.

The following code example demonstrates how to use the Item indexer to access the items that are in a TreeNodeBindingCollection object. The TreeNodeBinding object for the third-level nodes is updated programmatically with new values. 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#" %>

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

  void Page_Load(Object sender, EventArgs e)
  {

    // Use the indexer to access the TreeNodeBinding object for
    // the third-level nodes (index 2) and change the value of 
    // its TextField property to "Subject".
    BookTreeView.DataBindings[2].TextField = "Subject";

  }

</script>

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

      <h3>TreeNodeBindingCollection Indexer 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>

.NET Framework
Available since 2.0
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