Visual Studio扩展：如何在选择时获取解决方案文件夹的“路径”？

Question

上一个问题： Visual Studio扩展：如何禁用本机命令？

我构建了一个扩展来正确管理Git模块，为此，我在解决方案中有一个名为SubModules的文件夹。

我设法将上下文菜单添加到解决方案文件和项目文件中，但是在右键单击SubModules文件夹（即“删除”，“添加”）时，我想禁用一些本机命令。

我现在知道如何禁用所需的本机命令，但要这样做，我需要获取所选解决方案文件夹的“路径”。

我尝试实现IVsSelectionEvents，但是没有运气（o在转换之前不为null）：

public int OnSelectionChanged(IVsHierarchy pHierOld, uint itemidOld, IVsMultiItemSelect pMISOld, ISelectionContainer pSCOld, IVsHierarchy pHierNew, uint itemidNew, IVsMultiItemSelect pMISNew, ISelectionContainer pSCNew)
{
    var o = GetProjectItem(pHierNew, itemidNew);
    return VSConstants.S_OK;
}

private static ProjectItem GetProjectItem(IVsHierarchy hierarchy, uint itemId)
{
    object o;
    if (hierarchy.GetProperty(itemId, (int)__VSHPROPID.VSHPROPID_ExtObject, out o) == VSConstants.S_OK)
    {
        var t = o as SolutionFolder; // ==> null

        return o as ProjectItem; // ==> null
    }
    return null;
}

使用我拥有的代码（从另一个问题开始）（我想在其中找到“路径”，但是我可以使用上面的“解决方案”进行管理），我尝试将其强制转换为SolutionFolder或FileProperties ...仍然没有运气; 即使MSDN告诉返回的对象应该是FileProperties类型。 在(Marshal.GetObjectForIUnknown(selectionContainerPtr) as ISelectionContainer)上使用QuickWatch进行探索，我可以进入私有属性_nodes ，在那里，我可以看到我的SolutionFolder节点并使用其Parent属性来确保它是我想要的文件夹阻止命令。 这是实际的代码：

private static void CommandEvents_BeforeExecute(string Guid, int ID, object CustomIn, object CustomOut, ref bool CancelDefault)
{
    string name = GetCommandName(Guid, ID);

    if (name == "Project.AddNewSolutionFolder")
    {
        CancelDefault = true;
    }
    if (name == "Edit.Delete")
    {
        CancelDefault = true;

        IVsMultiItemSelect multiItemSelect = null;
        IntPtr hierarchyPtr = IntPtr.Zero;
        IntPtr selectionContainerPtr = IntPtr.Zero;
        uint itemid = 0;

        int hr = monitorSelection.GetCurrentSelection(out hierarchyPtr, out itemid, out multiItemSelect, out selectionContainerPtr);
        object[] selected = new object[2];
        (Marshal.GetObjectForIUnknown(selectionContainerPtr) as ISelectionContainer).GetObjects(2, 1, selected);


        var t = selected[0] as VSLangProj.FileProperties; // ==> null
        var t2 = selected[0] as SolutionFolder; // ==> null
        var b = 1;
    }

    if (name == "View.Branch")
    {
        //TODO: Could disable this command if not able to find the branch changing command (that would be cancelled and launch ours)
        menuBranchOpened = true;
    }

    if (menuBranchOpened)
    {
        var a = 1;
    }

}

我受到启发并尝试过（除了上面的那个似乎真的很接近之外，没有任何工作）：

• 获取Visual Studio解决方案文件和文件夹
• Visual Studio扩展：在解决方案资源管理器中获取当前所选文件的路径
• 如何使用vs包在解决方案资源管理器中获取所选项目的详细信息

Answer 1

最后，浏览（更多）回答我上一个问题的其他人的网站，我终于找到了它。 因此，我将分享一种我知道在解决方案资源管理器中选择了哪种类型的项目的方法。

applicationObject = await ServiceProvider.GetGlobalServiceAsync(typeof(SDTE)) as DTE2; // Was initiate in a method

private enum SelectionTypes
{
    Other = 0,
    InSubModules = 1,
    IsAFolder = 2,
    IsAProject = 4,
    InAProject = 8
}

private static List<SelectionTypes> GetSelectionTypes()
{
    ThreadHelper.ThrowIfNotOnUIThread();
    var selectionTypes = new List<SelectionTypes>();

    EnvDTE.UIHierarchy solutionExplorer = applicationObject.ToolWindows.SolutionExplorer;
    object[] items = solutionExplorer.SelectedItems as object[];
    //{ Name = "WindowBase" FullName = "Microsoft.VisualStudio.Platform.WindowManagement.DTE.WindowBase"}
    if (items.Length > 0)
    {
        for (int i = 0; i < items.Length; i++)
        {
            var selectionType = SelectionTypes.Other;
            var selectedItem = items[0] as EnvDTE.UIHierarchyItem;
            var currentItem = selectedItem;
            var subModulesParentsCount = 0;
            var countingSubModulesParents = false;
            var nbParents = -1;

            if (currentItem.Object.GetType().FullName == "Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProject") selectionType |= SelectionTypes.IsAProject;
            if (currentItem.Object.GetType().FullName == "Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAFolderItem") selectionType |= SelectionTypes.IsAFolder;

            while (currentItem != null)
            {
                nbParents++;
                if (countingSubModulesParents) subModulesParentsCount++;

                if (currentItem.Name == "SubModules")
                {
                    subModulesParentsCount = 0;
                    countingSubModulesParents = true;
                }

                if (currentItem.Object.GetType().FullName == "Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProject") selectionType |= SelectionTypes.InAProject;

                currentItem = currentItem.Collection.Parent as EnvDTE.UIHierarchyItem;
            }

            if (selectionType == SelectionTypes.Other && nbParents != 0) selectionType |= SelectionTypes.IsAFolder;

            if (subModulesParentsCount == 1)
            {
                selectionType |= SelectionTypes.InSubModules;
            }

            selectionTypes.Add(selectionType);
        }
    }

    return selectionTypes;
}