WPF外包公司—技术分享WPF只运行一个实例

首先引用Microsoft.VisualBasic
然后新建一个类 single
   public class single:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase
    {
       App a;
       public single()
       {
           this.IsSingleInstance = true;
       }
       protected override bool OnStartup(Microsoft.VisualBasic.ApplicationServices.StartupEventArgs eventArgs)
       {
           a = new App();
           a.InitializeComponent();
           a.Run();
           return false;
       }
       protected override void OnStartupNextInstance(Microsoft.VisualBasic.ApplicationServices.StartupNextInstanceEventArgs eventArgs)
       {
           base.OnStartupNextInstance(eventArgs);
           a.activate();
       }
    }

app.cs
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);
            Window1 w = new Window1();
            w.Show();
        }
        public void activate()
        {
            MainWindow.Activate();
        }
        private void Application_SessionEnding(object sender, SessionEndingCancelEventArgs e)
        {

        }
        private void Application_Startup(object sender, StartupEventArgs e)
        {

        }
        private void Application_Exit(object sender, ExitEventArgs e)
        {

        }
    }
app.g.cs
        [System.STAThreadAttribute()]
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        public static void Main(string [] a ) {
            single s = new single();
            s.Run(a);
        }

来源：https://www.cnblogs.com/dotfun/archive/2012/09/17/2688119.html

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