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 Extension: How to disable native command?

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

我设法将我的上下文菜单添加到解决方案文件和项目文件中，但是当我右键单击我的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我想要的本机命令，但为此，我需要获取所选解决方案文件夹的“路径”。

我试图实现IVsSelectionEvents，但没有运气（o在转换之前不是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;
}

使用我的代码（从另一个问题）（我想找到“路径”，但我可以使用上面的“解决方案”管理），我试图转换为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，我可以进入查看私有属性_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阻止命令的文件夹。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;
    }

}

我受到了启发和尝试（没有工作，除了上面的一个似乎真的很近）：

• Get Visual Studio Solution Files and Folders
• Visual Studio Extension: Get the path of the current selected file in the Solution Explorer
• How to get the details of the selected item in solution explorer using vs package

Answer 1

最后，探索（更多）回答我之前问题的其他人的网站，我终于找到了它。因此，我将分享一个方法，以了解在解决方案资源管理器中选择了哪些类型的项目。

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;
}