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.
我已经使用了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：
我已经使用了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,IntPtr.Zero);
// Refresh any open explorer windows
// based on https://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,windows,null);
for (int i = 0; i < (int)count; i++)
{
object item = windowsType.InvokeMember("Item",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",item,null);
if (itemName == "Windows Explorer")
{
itemType.InvokeMember("Refresh",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？
解决方法
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_DefView是WorkerW窗口之一的子代. (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,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),"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……