Handle Button Event with command arguments in asp.net

   

   

            onclick="ClickMe" />
   

   

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;


public partial class search : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void ClickMe(object sender, EventArgs e)
    {
        Button btn = (Button)sender;

        if (btn.CommandArgument.Equals("Reg"))
        {
            System.Windows.Forms.MessageBox.Show("Register Button Clicked !");
        }
        else
        {
            System.Windows.Forms.MessageBox.Show("Login Button Clicked !");
        }