WPF 精修篇 窗体唯一（Single） 显示在最前

原文: WPF 精修篇 窗体唯一（Single） 显示在最前

只运行一个窗体 并在一次点击时 显示到最前

发现用

SetForegroundWindow 并不是稳定的有效 

最后使用 SetWindowPos

贴码了

  
  
public const int HWND_TOPMOST = -1;
public const int HWND_NOTOPMOST = -2;
protected override void OnStartup(StartupEventArgs e)
{

bool isNewInstance;
base.OnStartup(e);
Mutex mutex = new Mutex( true, "Single", out isNewInstance);
if (isNewInstance != true)
{
IntPtr intPtr = FindWindowW( null, "Single");
if (intPtr != IntPtr.Zero)
{


SetWindowPos(intPtr, HWND_TOPMOST, 0, 0, 0, 0, 1 | 2);
SetWindowPos(intPtr, HWND_NOTOPMOST, 0, 0, 0, 0, 1 | 2);
SetForegroundWindow(intPtr);

}

Shutdown();
}
}
[ DllImport("User32", CharSet = CharSet.Unicode)]
static extern IntPtr FindWindowW(String lpClassName, String lpWindowName);
[ DllImport("User32", CharSet = CharSet.Unicode)]
static extern Boolean SetForegroundWindow(IntPtr hWnd);
[ DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern int SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int y, int Width, int Height, int flags);

[ DllImport("user32.dll")]
public static extern IntPtr SetFocus(IntPtr hWnd);
 
 

代码：

https://download.csdn.net/download/q465162770/12003540