c# – VS 2015动态菜单命令不像宣传的那样工作

Command1Package.cs：

using Microsoft.VisualStudio;
using Microsoft.VisualStudio.Shell;
using System;
using System.ComponentModel.Design;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.InteropServices;

namespace minimal {
    [PackageRegistration(UseManagedResourcesOnly = true)]
    [InstalledProductRegistration("#110","#112","1.0",IconResourceID = 400)] // Info on this package for Help/About
    [ProvideMenuResource("Menus.ctmenu",1)]
    [Guid(Command1Package.PackageGuidString)]
    [ProvideAutoLoad(VSConstants.UICONTEXT.NoSolution_string)]
    [SuppressMessage("StyleCop.CSharp.DocumentationRules","SA1650:ElementDocumentationMustBeSpelledCorrectly",Justification = "pkgdef,VS and vsixmanifest are valid VS terms")]
    public sealed class Command1Package : Package {
        public const string PackageGuidString = "3e88287b-7b79-403d-ae8d-3329af218869";
        public Command1Package() {
            }

        #region Package Members

        protected override void Initialize() {
            Debug.WriteLine("minimal package instantiated");
            Command1.Initialize(this,GetService(typeof(IMenuCommandService)) as OleMenuCommandService);
            base.Initialize();
            }

        #endregion
        }
    }

Command1.cs：

using Microsoft.VisualStudio.Shell;
using System;
using System.ComponentModel.Design;
using System.Diagnostics;

namespace minimal {
    internal sealed class Command1 {
        public static readonly Guid CommandSet = new Guid("c1388361-6429-452c-8ba0-580d292ef0ca");
        private Command1() {
            }

        public static void Initialize(Package package,OleMenuCommandService mcs) {
            AddOneCommand(mcs,0x0100,"Renamed placeholder command");  // the placeholder
            AddOneCommand(mcs,0x0101,"Dynamic command 1"); // a dynamic command
            AddOneCommand(mcs,0x0102,"Dynamic command 2");
            }

        internal static void AddOneCommand(OleMenuCommandService mcs,uint cmdid,string cmdname) {
            Debug.WriteLine("AddOneCommand" + cmdid.ToString("X4"));
            CommandID id = new CommandID(CommandSet,(int) cmdid);
            OleMenuCommand mc = new OleMenuCommand(new EventHandler(MenuItemCallback),id,cmdname);
            mc.BeforeQueryStatus += OnBeforeQueryStatus;
            mcs.AddCommand(mc);
            }

        private static void OnBeforeQueryStatus(object sender,EventArgs e) {
            OleMenuCommand mc = sender as OleMenuCommand;
            Debug.WriteLine("OnBeforeQueryStatus called for " + mc.CommandID.ToString());
            }

        private static void MenuItemCallback(object sender,EventArgs e) {
            OleMenuCommand mc = sender as OleMenuCommand;
            System.Windows.Forms.MessageBox.Show("MenuItemCallback called for " + mc.CommandID.ToString());
            }
        }
    }

Command1Package.vsct：

<?xml version="1.0" encoding="utf-8"?>
<CommandTable xmlns="http://schemas.microsoft.com/VisualStudio/2005-10-18/CommandTable" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <Extern href="stdidcmd.h"/>
    <Extern href="vsshlids.h"/>

    <Commands package="guidCommand1Package">

        <Groups>
            <Group guid="guidCommand1PackageCmdSet" id="MyMenuGroup" priority="0x0600">
                <Parent guid="guidSHLMainMenu" id="IDM_VS_MENU_TOOLS"/>
            </Group>
            <Group guid="guidCommand1PackageCmdSet" id="MyMenuSubgroup" priority="0x0100">
                <Parent guid="guidCommand1PackageCmdSet" id="SubMenu"/>
            </Group>
        </Groups>

        <Menus>
            <Menu guid="guidCommand1PackageCmdSet" id="SubMenu" priority="0x0100" type="Menu">
                <Parent guid="guidCommand1PackageCmdSet" id="MyMenuGroup"/>
                <Strings>
                    <ButtonText>Minimal commands</ButtonText>
                    <CommandName>MinimalCommands</CommandName>
                </Strings>
            </Menu>
        </Menus>

        <Buttons>
            <Button guid="guidCommand1PackageCmdSet" id="Command1Id" priority="0x0100" type="Button">
                <Parent guid="guidCommand1PackageCmdSet" id="MyMenuSubgroup" />
                <CommandFlag>DynamicItemStart</CommandFlag>
                <CommandFlag>TextChanges</CommandFlag>
                <CommandFlag>DynamicVisibility</CommandFlag>
                <Strings>
                    <ButtonText>Invoke Command1</ButtonText>
                    <CommandName>Command1</CommandName>
                </Strings>
            </Button>
        </Buttons>

    </Commands>

    <Symbols>
        <GuidSymbol name="guidCommand1Package" value="{3e88287b-7b79-403d-ae8d-3329af218869}" />
        <GuidSymbol name="guidCommand1PackageCmdSet" value="{c1388361-6429-452c-8ba0-580d292ef0ca}">
            <IDSymbol name="MyMenuGroup" value="0x1020" />
            <IDSymbol name="MyMenuSubgroup" value="0x1021"/>
            <IDSymbol name="SubMenu" value="0x200"/>
            <IDSymbol name="Command1Id" value="0x0100" />
        </GuidSymbol>
    </Symbols>
</CommandTable>

一些观察：

>如果包中没有[ProvideAutoLoad]属性,则在执行占位符命令之前,框架不会实例化包,该命令是该子菜单上唯一的项目.似乎VS向导生成的代码应该为您执行此操作,因为在Package类的帮助条目中未提及此属性(以及许多其他属性).
>我真的希望占位符不会出现在菜单上.但是将其标记为不可见(在OnBeforeQueryStatus中)会使整个子菜单消失.我能做的最好的事情是更改此命令的名称. “如何：动态添加菜单项”的帮助条目没有提到这一点. (不要费心阅读VS 2015的条目,因为示例代码是不必要的复杂,并没有显示如何动态添加菜单命令这一简单的事情.VS 2012示例更容易遵循.)
>< rant> Dang,但这在MFC中更容易！ GetMenu(),GetSubMenu()等我认为.net应该比传统的Win32编程更容易.< / rant>
>有没有更好的方法将动态项添加到菜单？