WPF整理-Mutex確保Application單例運行

有時咱們不但願咱們的WPF應用程序能夠同時運行有多個實例，當咱們試圖運行第二個實例的時候，已經運行的實例也應該彈出來。

咱們能夠用Mutex來實現

打開App.xaml.cs，在App類中添加以下內容

    public partial class App : Application
    {
        [DllImport("user32", CharSet = CharSet.Unicode)]
        static extern IntPtr FindWindow(string cls, string win);
        [DllImport("user32")]
        static extern IntPtr SetForegroundWindow(IntPtr hWnd);
        [DllImport("user32")]
        static extern bool IsIconic(IntPtr hWnd);
        [DllImport("user32")]
        static extern bool OpenIcon(IntPtr hWnd);

        protected override void OnStartup(StartupEventArgs e)
        {
            bool isNew;
            var mutex = new Mutex(true, "My Singleton Instance", out isNew);
            if (!isNew)
            {
                ActivateOtherWindow();
                Shutdown();
            }
        }
        private static void ActivateOtherWindow()
        {
            var other = FindWindow(null, "MainWindow");
            if (other != IntPtr.Zero)
            {
                SetForegroundWindow(other);
                if (IsIconic(other))
                    OpenIcon(other);
            }
        }
    }

 

WPF實現和WinForm略有區別，請參考DebugLZQ前面的博文：使用內核對象Mutex能夠防止同一個進程運行兩次

Update：擴展參考：Process and Assembly