WPF 设置第二次打开程序直接弹出第一次打开的程序

激活已经打开窗口函数
[DllImport("user32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);
[DllImport("user32.dll")]
private static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);
[DllImport("user32.dll")]
private static extern bool IsIconic(IntPtr hWnd);
private const int SW_RESTORE = 9;
/// <summary>
/// 激活已打开窗口
/// </summary>
public static void RaiseOtherProcess()
{
Process proc = Process.GetCurrentProcess();
foreach (Process otherProc in
Process.GetProcessesByName(Process.GetCurrentProcess().ProcessName))
{
if (proc.Id != otherProc.Id)
{
IntPtr hWnd = otherProc.MainWindowHandle;
if (IsIconic(hWnd))
{
ShowWindowAsync(hWnd, 9);
}
SetForegroundWindow(hWnd);
break;
}
}
}
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启动入口调用示例
//获取启动进程名
string strProcessName = System.Diagnostics.Process.GetCurrentProcess().ProcessName;
//检查进程是否已经启动，已经启动则退出程序，显示已启动的程序。
if (System.Diagnostics.Process.GetProcessesByName(strProcessName).Length > 1)
{
RaiseOtherProcess();
Application.Current.Shutdown();
return;
}