protected void row_deleting(object sender, GridViewDeleteEventArgs e) { int id = Convert.ToInt32((grd_list_tutors.DataKeys[e.RowIndex].Value)); class_list_package cls2 = new class_list_package(); int i = cls2.delete(id); if (i > 0) { ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('Record deleted successfully')", true); } else { ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('Record not deleted successfully')", true); } databind1(); }