protected void GridView2_RowCommand(object sender, GridViewCommandEventArgs e) { if (e.CommandName == "Delete") { try { string file_id = Convert.ToString(e.CommandArgument); bl.File_id = file_id; if (Session["User_Id"] != null) { bl.User_id = Session["User_Id"].ToString(); } else { if (Request.Cookies["User_Id"] != null) { Session["User_Id"] = Request.Cookies["User_Id"].Value; bl.User_id = Request.Cookies["User_Id"].Value; } } rb = dl.delete_file_upload(bl); if (rb.status == true) { Utilities.MessageBox_UpdatePanel(UpdatePanel2, "Deleted Successfully"); } else { Utilities.MessageBox_UpdatePanel(UpdatePanel2, "Not Deleted "); } GetFileUpload_report(); } catch (NullReferenceException) { // Utilities.MessageBox_UpdatePanel_Redirect(UpdatePanel2, "Your Session Has Expired Please Login Again", "../Logout.aspx"); } } }