DevExpress自定义Spreadsheetcontrol 单元格右键菜单

using DevExpress.XtraSpreadsheet;using DevExpress.XtraSpreadsheet.Commands;using DevExpress.XtraSpreadsheet.Services;using DevExpress.XtraSpreadsheet.Menu;        private void spreadsheetControl1_PopupMenuShowing(object sender, PopupMenuShowingEventArgs e)        {            if (e.MenuType == SpreadsheetMenuType.Cell)            {                // Remove the "Clear Contents" menu item.                e.Menu.RemoveMenuItem(SpreadsheetCommandId.FormatClearContentsContextMenuItem);                // Disable the "Hyperlink" menu item.                e.Menu.DisableMenuItem(SpreadsheetCommandId.InsertHyperlinkContextMenuItem);                // Create a menu item for the Spreadsheet command, which inserts a picture into a worksheet.                ISpreadsheetCommandFactoryService service = (ISpreadsheetCommandFactoryService)spreadsheetControl1.GetService(typeof(ISpreadsheetCommandFactoryService));                SpreadsheetCommand cmd = service.CreateCommand(SpreadsheetCommandId.InsertPicture);                SpreadsheetMenuItemCommandWinAdapter menuItemCommandAdapter = new SpreadsheetMenuItemCommandWinAdapter(cmd);                SpreadsheetMenuItem menuItem = (SpreadsheetMenuItem)menuItemCommandAdapter.CreateMenuItem(DevExpress.Utils.Menu.DXMenuItemPriority.Normal);                menuItem.BeginGroup = true;                e.Menu.Items.Add(menuItem);                // Insert a new item into the Spreadsheet popup menu and handle its click event.                SpreadsheetMenuItem myItem = new SpreadsheetMenuItem("My Menu Item", new EventHandler(MyClickHandler));                e.Menu.Items.Add(myItem);            }        }        public void MyClickHandler(object sender, EventArgs e)        {            MessageBox.Show("My Menu Item Clicked!");        }