c# - 将项目添加到 PopupMenu

Question

我正在尝试寻找如何将项目添加到 devExpress PopupMenu。我尝试了以下方法:

        manager = new BarManager();
        listBoxMenu = new PopupMenu(manager);

        listBoxMenu.ItemLinks.Add(manager.Items["Remove item"]);
        listBoxMenu.ItemLinks.Add(manager.Items["Clear items"]);

如此处 http://documentation.devexpress.com/#WindowsForms/CustomDocument5472 所示(在底部)，但它给我一个错误，提示该项目未初始化。

添加项目的正确方法是什么？我到处都找不到。

编辑，这是我的做法:

        //Creates the popup menu to be used for the keywords listbox
        manager = new BarManager();
        listBoxMenu = new PopupMenu(manager);

        item = new BarButtonItem(manager, "Copy");
        item2 = new BarButtonItem(manager, "Clear Item");
        item3 = new BarButtonItem(manager, "Clear All Items");

        listBoxMenu.ItemLinks.Add(item);
        listBoxMenu.ItemLinks.Add(item2);
        listBoxMenu.ItemLinks.Add(item3);

        //Adds the seperator on the second item
        item2.Links[0].BeginGroup = true;

        manager.ItemClick += manager_ItemClick;

Answer 1

检查此代码片段并使用相同的方式实现。

//创建弹出窗口并管理对象

private DevExpress.XtraBars.BarManager barManager1;
        private DevExpress.XtraBars.PopupMenu buttonContextMenu;
        DevExpress.XtraBars.BarButtonItem menuButtonExport = new DevExpress.XtraBars.BarButtonItem();
        DevExpress.XtraBars.BarButtonItem menuButtonSave = new DevExpress.XtraBars.BarButtonItem();

        public TestForm8()
        {
            InitializeComponent();
            barManager1 = new BarManager();
            this.barManager1.Form = this;
            buttonContextMenu = new DevExpress.XtraBars.PopupMenu(barManager1);                 
            this.buttonContextMenu.Name = "subViewContextMenu";            


            menuButtonExport.Caption = "E&xport";
            menuButtonExport.Id = 1;
            menuButtonExport.Name = "menuButtonExport";
            menuButtonExport.ItemClick += new ItemClickEventHandler(menuButtonExport_ItemClick);

            menuButtonSave.Caption = "S&ave";
            menuButtonSave.Id = 2;
            menuButtonSave.Name = "menuButtonSave";
            menuButtonSave.ItemClick += new ItemClickEventHandler(menuButtonSave_ItemClick);
//add items to barmanager
            this.barManager1.Items.AddRange(new DevExpress.XtraBars.BarItem[] {
            menuButtonExport,
            menuButtonSave
            });
//create links between bar items and popup
            buttonContextMenu.ItemLinks.Add(barManager1.Items["menuButtonExport"]);
            buttonContextMenu.ItemLinks.Add(barManager1.Items["menuButtonSave"]);
//finally set the context menu to the control or use the showpopup method on right click of control
            barManager1.SetPopupContextMenu(btnInsert, buttonContextMenu);
}

逐步引用以包含弹出窗口:

How to: Create a popup menu
How to: Add items to a container bar item (menu)
Populating Popup Menus
BarManager.SetPopupContextMenu Method