在WPF中检测系统主题更改
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对于WPF应用程序，我需要检测DWM何时打开/关闭或系统主题何时更改。
WinForms中有这样的事件，但是我在WPF中看不到任何事件。
没有找到相关结果
已邀请:
3 个回复
疼嘶桐
事件的原因）。也就是说，当切换DWM和更改主题时，Windows会将消息发送到所有窗口，并且您仍然可以从WPF层深入到低级别以访问这些消息并相应地操纵WPF控件。 作为窗口的window3ѭ事件的一部分，将窗口过程附加到WPF窗口的HWND（窗口句柄）。在您的窗口过程中，分别处理和窗口消息。 这是一个简单的示例（根据我的问题改编了样板代码）：private IntPtr hwnd; private HwndSource hsource; private void Window_SourceInitialized(object sender, EventArgs e) { if ((hwnd = new WindowInteropHelper(this).Handle) == IntPtr.Zero) { throw new InvalidOperationException(\"Could not get window handle.\"); } hsource = HwndSource.FromHwnd(hwnd); hsource.AddHook(WndProc); } private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) { switch (msg) { case WM_DWMCOMPOSITIONCHANGED: // Define this as 0x31A case WM_THEMECHANGED: // Define this as 0x31E // Respond to DWM being enabled/disabled or system theme being changed return IntPtr.Zero; default: return IntPtr.Zero; } }绊伦欧
感秆暴壳
private const int WM_DWMCOLORIZATIONCOLORCHANGED = 0x320; private const int WM_DWMCOMPOSITIONCHANGED = 0x31E; private const int WM_THEMECHANGED = 0x031A; protected override void WndProc(ref Message m) { switch(m.Msg) { case WM_DWMCOLORIZATIONCOLORCHANGED: case WM_DWMCOMPOSITIONCHANGED: case WM_THEMECHANGED: // you code here break; default: break; } base.WndProc(ref m); }Microsoft.Win32.SystemEvents.UserPreferenceChanged += SystemEvents_UserPreferenceChanged; private void SystemEvents_UserPreferenceChanged(object sender, Microsoft.Win32.UserPreferenceChangedEventArgs e) { if (e.Category == Microsoft.Win32.UserPreferenceCategory.General) { // your code here, compare saved theme color with current one } }