DataGridItem.ItemIndex Property

 

Gets the index of the DataGridItem object from the Items collection of the DataGrid control.

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

public virtual int ItemIndex { get; }

Property Value

Type: System.Int32

The index of the DataGridItem from the Items collection of the DataGrid control.

Use the ItemIndex property to determine the index of the DataGridItem object from the Items collection of the DataGrid control.

System_CAPS_noteNote

This property applies only to data items in the DataGrid control. The ItemType property of the DataGridItem object must be set to ListItemType.Item, ListItemType.AlternatingItem, ListItemType.SelectedItem, or ListItemType.EditItem.

The following code example demonstrates how to use the ItemIndex property to display the index of the DataGridItem object from the Items collection of the DataGrid control.

System_CAPS_noteNote

The following code example uses the single-file code model and might not work correctly if copied directly into a code-behind file. This code example must be copied into an empty text file that has an .aspx extension. For more information on the Web Forms code model, see NIB: Events and Delegates.

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<script language="C#" runat="server">

   DataTable Cart;
   DataView CartView;

   ICollection CreateDataSource() 
   {
      DataTable dt = new DataTable();
      DataRow dr;

      dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
      dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
      dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));

      for (int i = 0; i < 10; i++) 
      {
         dr = dt.NewRow();

         dr[0] = i;
         dr[1] = "Item " + i.ToString();
         dr[2] = 1.23 * (i+1);

         dt.Rows.Add(dr);
      }

      DataView dv = new DataView(dt);
      return dv;
   }

   void Page_Load(Object sender, EventArgs e) 
   {

      if (!IsPostBack) 
      {
         // Need to load this data only once.
         ItemsGrid.DataSource = CreateDataSource();
         ItemsGrid.DataBind();
      }

   }

   void Button_Click(Object sender, EventArgs e) 
   {

      Label1.Text = "The DataSetIndex of each item in the DataGrid are: <br />"; 

      foreach (DataGridItem item in ItemsGrid.Items)
      { 
         Label1.Text += "<br />" + item.ItemIndex.ToString() +
                        " - " + item.Cells[1].Text;
      }

   }

</script>

<head runat="server">
    <title>DataGridItem ItemIndex Example</title>
</head>
<body>

   <form id="form1" runat="server">

      <h3>DataGridItem ItemIndex Example</h3>

      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true"
           AutoGenerateColumns="true">

         <HeaderStyle BackColor="#00aaaa">
         </HeaderStyle>

         <FooterStyle BackColor="#00aaaa">
         </FooterStyle>

      </asp:DataGrid>

      <br />

      <asp:Button id="Button1"
           Text="Display ItemIndex of Items in DataGrid"
           OnClick="Button_Click"
           runat="server"/>

      <br /><br />

      <asp:Label id="Label1" 
           runat="server"/>

   </form>

</body>
</html>

.NET Framework
Available since 1.1
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