//To detect the Repeater item  on button click clicked on 

  ImageButton close = (ImageButton)sender;
  RepeaterItem gvRow = (RepeaterItem)close.NamingContainer;
  String URL = ((HtmlInputHidden)gvRow.FindControl("Text1")).Value;

//To delete row from table in c# if datakey is equal to the column value in table


   DataSet ds_cart = (DataSet)(Session["TempCart"]);
   String[] arr = e.CommandArgument.ToString().Split(',');
   foreach (DataRow row in ds_cart.Tables[0].Rows)
   {
       if (row["OrderID"].ToString() == arr[0].ToString())
       {
         row.Delete();
         break; 
       }
        
    }