protected void EmployeesGrid_RowDeleting(object sender, DevExpress.Web.Data.ASPxDataDeletingEventArgs e)
        {
            int          rowindex = EmployeesGrid.FindVisibleIndexByKeyValue(e.Keys[EmployeesGrid.KeyFieldName]);
            ASPxGridView grid     = (ASPxGridView)sender;
            var          id       = grid.GetRowValues(rowindex, "ID").ToString();

            db.D_Grup(Convert.ToInt32(id));
            e.Cancel = true;
            EmployeesGrid.CancelEdit();
            Update();
        }