菜单项的动态可见性

Question

在我的VS扩展中,我需要为我的新项目类型添加菜单项.但我希望它只显示我的自定义类型.所以我将此代码添加到.vcst文件中:

  <Button guid="_Interactive_WindowCmdSet" id="cmdidLoadUI" priority="0x0100" type="Button">
    <Parent guid="_Interactive_WindowCmdSet" id="ProjectItemMenuGroup" />
    <Icon guid="guidImages" id="bmpPic1" />
    <CommandFlag>DynamicVisibility</CommandFlag>
    <Strings>
      <ButtonText>Load</ButtonText>
    </Strings>
  </Button>


  <Group  guid="_Interactive_WindowCmdSet" id="ProjectItemMenuGroup" priority="0x0600">
    <Parent guid="guidSHLMainMenu" id="IDM_VS_CTXT_PROJNODE"/>
  </Group>

并将此代码添加到包初始化:

            // Create the command for the menu item.
            CommandID projectMenuCommandID = new CommandID(GuidList.Interactive_WindowCmdSet, (int)PkgCmdIDList.cmdidLoadUI);
            OleMenuCommand projectmenuItem = new OleMenuCommand(LoadUIMenuItemCallback, projectMenuCommandID);
            projectmenuItem.BeforeQueryStatus += projectmenuItem_BeforeQueryStatus;
            mcs.AddCommand(projectmenuItem);

查询状态处理程序是:

    private void projectmenuItem_BeforeQueryStatus(object sender, EventArgs e)
    {
        OleMenuCommand menuCommand = sender as OleMenuCommand;

        if (menuCommand != null)
            menuCommand.Visible = IsProjectOfRightType(GetSelected<Project>());
    }

问题是 - 这个状态处理程序永远不会被调用.所以我为所有项目类型显示了此菜单项.

我也试过IOleCommandTarget在我的包上实现接口,比如:

    public int QueryStatus(ref Guid guidCmdGroup, uint cCmds, OLECMD[] prgCmds, IntPtr pCmdText)
    {
        // Disable all commands in case if project is VisuaART project, otherwise - disable them.
        OLECMDF cmdf;

        for (int i = 0; i < cCmds; i++)
        {
            var command = prgCmds[i];
            if (command.cmdID == PkgCmdIDList.cmdidLoadUI)
            {
                if (IsProjectOfRightType(GetSelected<Project>()))
                    command.cmdf = (uint)COMMAND_SUPPORTED;
                else
                    command.cmdf = (uint)COMMAND_UNSUPPORTED;
            }

        }
        return VSConstants.S_OK;
    }

    private const OLECMDF COMMAND_SUPPORTED = OLECMDF.OLECMDF_SUPPORTED | OLECMDF.OLECMDF_ENABLED;
    private const OLECMDF COMMAND_UNSUPPORTED = OLECMDF.OLECMDF_INVISIBLE;

但这也没有帮助.调用方法,但设置OLECMDF.OLECMDF_INVISIBLE不执行任何操作.如何为不支持的菜单项隐藏此菜单项？

Answer 1

可能问题与包的负载有关.要自动加载Package,只需将此属性添加到Package Class:

[ProvideAutoLoad("f1536ef8-92ec-443c-9ed7-fdadf150da82")]

例:

.
.
[ProvideAutoLoad("f1536ef8-92ec-443c-9ed7-fdadf150da82")]
public sealed class MyPackageTest : Package
{
.
.

如果不添加此属性,则只需在单击"包"的任何按钮时加载该类.

我希望我有所帮助.