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

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

    }

    protected void btnDrill_Click(object sender, EventArgs e)
    {
        Hashtable fieldValues = new Hashtable();

        Button btnDrill = sender as Button;

        ((GridDataItem)btnDrill.NamingContainer).ExtractValues(fieldValues);
        
        //now fieldValues contains all the column values for the given row
        //and you can use those for further database operations.
    }


}
