從匿名函數獲取返回值，該返回值轉換為無效返回委托

Question

我正在努力返回用戶所關注的當前Active Directory的確切路徑，然后我找到了一些代碼，盡管它們似乎都無法正常工作且存在錯誤。 但是這段代碼似乎可以正常工作...無論如何我都想返回所提到的路徑（在此代碼中稱為currDirectory ；當我在此代碼中將void類型更改為字符串類型並使用return currDirectory ，出現錯誤

從匿名函數返回的值轉換為void返回的委托無法返回值

任何人都可以更改此代碼，以便它可以將currDirectory作為字符串返回嗎？

class Class2
{
    public static void Main()
    {
        RefreshWindow();  
    }

    public static string RefreshWindow()
    {
        Guid CLSID_ShellApplication = new Guid("13709620-C279-11CE-A49E-444553540000");
        Type shellApplicationType = Type.GetTypeFromCLSID(CLSID_ShellApplication, true);

        object shellApplication = Activator.CreateInstance(shellApplicationType);
        object windows = shellApplicationType.InvokeMember("Windows", System.Reflection.BindingFlags.InvokeMethod, null, shellApplication, new object[] { });

        Type windowsType = windows.GetType();
        object count = windowsType.InvokeMember("Count", System.Reflection.BindingFlags.GetProperty, null, windows, null);

        Parallel.For(0, (int)count, i =>
        {
            object item = windowsType.InvokeMember("Item", System.Reflection.BindingFlags.InvokeMethod, null, windows, new object[] { i });
            Type itemType = item.GetType();
            string itemName = (string)itemType.InvokeMember("Name", System.Reflection.BindingFlags.GetProperty, null, item, null);

            if (itemName == "Windows Explorer" || itemName == "File Explorer")
            {
                string currDirectory = HttpUtility.HtmlEncode((string)itemType.InvokeMember("LocationURL", System.Reflection.BindingFlags.GetProperty, null, item, null)).Replace("///", @"\").Replace("/", @"\").Replace("%20", " ").Replace(@"file:\", "");

                Console.WriteLine(currDirectory);
                Console.Read();

                return currDirectory;
            }
        });
    }
}

Answer 1

您的代碼將不會返回單個路徑，它將返回所有打開的Windows資源管理器實例，因此，如果您打開了多個實例，則將全部返回。無論如何，請看下面我的解決方案，它應該可以解決您的問題。

public static string[] RefreshWindow()
{

    Guid CLSID_ShellApplication = new Guid("13709620-C279-11CE-A49E-444553540000");
    Type shellApplicationType = Type.GetTypeFromCLSID(CLSID_ShellApplication, true);

    object shellApplication = Activator.CreateInstance(shellApplicationType);
    object windows = shellApplicationType.InvokeMember("Windows", System.Reflection.BindingFlags.InvokeMethod, null, shellApplication, new object[] { });

    Type windowsType = windows.GetType();
    var count = (int)windowsType.InvokeMember("Count", System.Reflection.BindingFlags.GetProperty, null, windows, null);

    string[] currentDirectories = new string[count];
    Parallel.For(0, count, i =>
    {
        object item = windowsType.InvokeMember("Item", System.Reflection.BindingFlags.InvokeMethod, null, windows, new object[] { i });
        Type itemType = item.GetType();
        string itemName = (string)itemType.InvokeMember("Name", System.Reflection.BindingFlags.GetProperty, null, item, null);
        if (itemName == "Windows Explorer" || itemName == "File Explorer")
        {
            string currDirectory = HttpUtility.HtmlEncode((string)itemType.InvokeMember("LocationURL", System.Reflection.BindingFlags.GetProperty, null, item, null)).Replace("///", @"\").Replace("/", @"\").Replace("%20", " ").Replace(@"file:\", "");

            currentDirectories[i] =  currDirectory;
        }

    });
    return currentDirectories;
}

結果應該是這樣的：