Bruno Alexandre / DataGrid with thead and tfoot Example

// #########################################
// Default.aspx.cs File
// #########################################

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Reflection;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            myDataGrid dg = new myDataGrid();
            dg.DataSource = new string[] { "1", "2", "3", "4", "5", "6" };
            dg.DataBind();

            ph.Controls.Add(dg);
        }
    }
}

public class myDataGrid : System.Web.UI.WebControls.DataGrid
{
    protected override void OnPreRender(EventArgs e)
    {
        Table table = Controls[0] as Table;

        if (table != null && table.Rows.Count > 0)
        {
            // first row is the Table Header <thead>
            table.Rows[0].TableSection = TableRowSection.TableHeader;
            // last row is the Footer Header <tfoot> (comment for not using this)
            table.Rows[table.Rows.Count - 1].TableSection = TableRowSection.TableFooter;

            FieldInfo field = typeof(WebControl).GetField("tagKey", BindingFlags.Instance | BindingFlags.NonPublic);
            foreach (TableCell cell in table.Rows[0].Cells)
                field.SetValue(cell, HtmlTextWriterTag.Th);
        }
        base.OnPreRender(e);
    }
}


<!--
// #########################################
// Default.aspx File
// #########################################
-->

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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">
<head runat="server">
    <title>DataGrid with thead and tfoot Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h1>
            DataGrid example</h1>
        <asp:PlaceHolder ID="ph" runat="server" />
    </div>
    </form>
</body>
</html>