如何刷新/重新加载桌面

我有一个WPF C#项目,我正在实现Windows文件夹选项的设置。 其中之一是“单击以打开项目”(而不是双击)。 当我更改注册表项时,我需要刷新我找到解决方案的Windows资源管理器。 但桌面不刷新,甚至手动刷新它不会应用更改。 我使用过IActiveDesktop :: ApplyChanges方法,但没有用(或者我犯了一个错误)。 我也使用了这段代码片段,但它仍然没有应用我所做的更改:

SHChangeNotify(0x8000000, 0x1000, IntPtr.Zero, IntPtr.Zero); 

这里是我用来刷新Win Explorer的完整代码片段(女巫来自这个网站):

 [System.Runtime.InteropServices.DllImport("Shell32.dll")] private static extern int SHChangeNotify(int eventId, int flags, IntPtr item1, IntPtr item2); public static void RefreshWindowsExplorer() { // Refresh the desktop SHChangeNotify(0x8000000, 0x1000, IntPtr.Zero, IntPtr.Zero); // Refresh any open explorer windows // based on http://stackoverflow.com/questions/2488727/refresh-windows-explorer-in-win7 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); for (int i = 0; i < (int)count; i++) { object item = windowsType.InvokeMember("Item", System.Reflection.BindingFlags.InvokeMethod, null, windows, new object[] { i }); Type itemType = item.GetType(); // Only refresh Windows Explorer, without checking for the name this could refresh open IE windows string itemName = (string)itemType.InvokeMember("Name", System.Reflection.BindingFlags.GetProperty, null, item, null); if (itemName == "Windows Explorer") { itemType.InvokeMember("Refresh", System.Reflection.BindingFlags.InvokeMethod, null, item, null); } } } 

这适用于Windows资源管理器,但不适用于桌面(这是奇怪的,因为桌面也依赖于资源管理器)。 那么我应该如何重新加载桌面以使我的更改生效?

感谢您的所有回复和评论。 我终于想出了解决这个问题的方法。 我们可以隐藏所有桌面图标,然后再次显示它们。 这将强制桌面重新加载。

更新:在Window 8中, SHELLDLL_DefViewWorkerW窗口之一的WorkerW 。 (而不是Progman )所以这里是更新的代码,也适用于Windows 8和8.1:

  [DllImport("user32.dll", SetLastError = true)] static extern IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", SetLastError = true)] static extern IntPtr GetWindow(IntPtr hWnd, GetWindow_Cmd uCmd); [DllImport("user32.dll", CharSet = CharSet.Auto)] static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam); enum GetWindow_Cmd : uint { GW_HWNDFIRST = 0, GW_HWNDLAST = 1, GW_HWNDNEXT = 2, GW_HWNDPREV = 3, GW_OWNER = 4, GW_CHILD = 5, GW_ENABLEDPOPUP = 6 } private const int WM_COMMAND = 0x111; [DllImport("user32.dll", SetLastError = true)] static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow); private delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam); [DllImport("user32.dll", CharSet = CharSet.Unicode)] private static extern int GetWindowText(IntPtr hWnd, StringBuilder strText, int maxCount); [DllImport("user32.dll", CharSet = CharSet.Unicode)] private static extern int GetWindowTextLength(IntPtr hWnd); [DllImport("user32.dll")] private static extern bool EnumWindows(EnumWindowsProc enumProc, IntPtr lParam); [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount); public static string GetWindowText(IntPtr hWnd) { int size = GetWindowTextLength(hWnd); if (size++ > 0) { var builder = new StringBuilder(size); GetWindowText(hWnd, builder, builder.Capacity); return builder.ToString(); } return String.Empty; } public static IEnumerable FindWindowsWithClass(string className) { IntPtr found = IntPtr.Zero; List windows = new List(); EnumWindows(delegate(IntPtr wnd, IntPtr param) { StringBuilder cl = new StringBuilder(256); GetClassName(wnd, cl, cl.Capacity); if (cl.ToString() == className && (GetWindowText(wnd) == "" || GetWindowText(wnd) == null)) { windows.Add(wnd); } return true; }, IntPtr.Zero); return windows; } static void ToggleDesktopIcons() { var toggleDesktopCommand = new IntPtr(0x7402); IntPtr hWnd = IntPtr.Zero; if (Environment.OSVersion.Version.Major < 6 || Environment.OSVersion.Version.Minor < 2) //7 and - hWnd = GetWindow(FindWindow("Progman", "Program Manager"), GetWindow_Cmd.GW_CHILD); else { var ptrs = FindWindowsWithClass("WorkerW"); int i = 0; while (hWnd == IntPtr.Zero && i < ptrs.Count()) { hWnd = FindWindowEx(ptrs.ElementAt(i), IntPtr.Zero, "SHELLDLL_DefView", null); i++; } } SendMessage(hWnd, WM_COMMAND, toggleDesktopCommand, IntPtr.Zero); } 

现在我们可以两次切换桌面图标:

  ToggleDesktopIcons(); ToggleDesktopIcons(); 

希望这有助于其他人......

如果您已经发布了更改该设置的代码,我会在回复之前根据以下建议对其进行测试。

你有没有尝试过:

1)从上面的代码中删除if (itemName == "Windows Explorer")语句,以便刷新每个窗口(包括桌面)?

2)通过SendMessage WIN32 API广播WM_SETTINGCHANGE?

 private const int HWND_BROADCAST = 0xffff; private const int WM_WININICHANGE = 0x001a, WM_SETTINGCHANGE = 0x001a, INI_INTL = 1; [DllImport("user32.dll")] private static extern int SendMessage(int hWnd, uint wMsg, uint wParam, uint lParam); SendMessage(HWND_BROADCAST, WM_SETTINGCHANGE, 0, INI_INTL); 

[信用]

3)IActiveDesktop.ApplyChanges

 [ComImport] [Guid("F490EB00-1240-11D1-9888-006097DEACF9")] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] public interface IActiveDesktop { [PreserveSig] int ApplyChanges(AD_Apply dwFlags); // [...] // Note: There is a lot more to this interface, // please see PInvoke.net link below. } private const int AD_APPLY_REFRESH = 4; IActiveDesktop.ApplyChanges(AD_APPLY_REFRESH); 

[PInvoke.net – IActiveDesktop]

如果这些不起作用,请告诉我。 如果归结为它,可以保存所有打开的资源管理器窗口及其位置,终止资源管理器,等待资源管理器重新启动,重新打开每个资源管理器窗口并重新定位它们……如果这是可以接受的。

希望这可以帮助。