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“单击打开一个项目”（而不是双击）。 当我为这个问题更改注册表项时，我需要刷新我找到解决方案的Windows资源管理器。 但是桌面不会刷新，甚至手动刷新也不会应用更改。 我使用IActiveDesktop :: ApplyChanges方法，但没有工作（或者我犯了一个错误）。 我也使用了这段代码片段，但它仍然不适用我所做的更改：
SHChangeNotify(0x8000000, 0x1000, IntPtr.Zero, IntPtr.Zero);
这里是我用来刷新Win Explorer（女巫来自这个网站）的完整代码片段：
[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（这很奇怪，因为桌面也取决于资源管理器）。 那么我应该如何重新加载桌面以便我的更改生效？
如果您发布了更改该设置的代码，我会在回复之前根据以下建议进行测试。
你有没有尝试过：
1）从上面的代码中删除语句if (itemName == "Windows Explorer") ，所以它刷新每个窗口（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。 如果涉及到它，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...如果可以接受的话。
希望这可以帮助。
感谢您的回复和评论。 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，然后再显示它们。 这将强制桌面重新加载。
更新：在Window 8中， SHELLDLL_DefView是WorkerW窗口之一的子项。 （而不是Progman ）所以这里是更新的代码，它也适用于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<IntPtr> FindWindowsWithClass(string className)
{
IntPtr found = IntPtr.Zero;
List<IntPtr> windows = new List<IntPtr>();
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);
}
现在我们可以切换两次桌面图标：
ToggleDesktopIcons();
ToggleDesktopIcons();
希望这可以帮助别人...
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