private void grdData_SelectionChanged(object sender, EventArgs e) { if (grdData.SelectedRows == null || grdData.SelectedRows.Count < 1) { return; } string id = grdData.SelectedRows[0].Cells["ColCode"].Value.ToString(); grdMenu.AllowUserToOrderColumns = false; IsysService service = sysService.GetService(); grdMenu.DataSource = service.GetMenuByRoleId(id); }