.net4.0中wpf单例启动

添加Microsoft.VisualBasic引用,头引用

using Microsoft.VisualBasic.ApplicationServices;

打开App.xaml.cs文件,将文件修改为如下

class Program

    {

        [STAThread]

        static void Main(string[] args)

        {

            SingleInstanceApp a = new SingleInstanceApp();

            a.Run(args);

        }

    }



    /// <summary>

    /// App.xaml 的交互逻辑

    /// </summary>

    public partial class App : System.Windows.Application

    {

        protected override void OnStartup(System.Windows.StartupEventArgs e)

        {

            base.OnStartup(e);

            InitializeComponent();

        }

    }



    public class SingleInstanceApp : WindowsFormsApplicationBase

    {

        App win = null;

        public SingleInstanceApp()

        {

            this.IsSingleInstance = true;

        }



        protected override bool OnStartup(Microsoft.VisualBasic.ApplicationServices.StartupEventArgs eventArgs)

        {

            win = new App();

            win.Run();

            return false;

        }



        protected override void OnStartupNextInstance(StartupNextInstanceEventArgs eventArgs)

        {

            foreach (System.Windows.Window _win in win.Windows)

            {

                if (_win.Visibility == System.Windows.Visibility.Visible)

                {

                    _win.Activate();

                }

            }

        }

    }

　　编译下,vs会告知有2个入口函数,定位到App.g.cs的main函数,直接删除掉就可以了~~以上代码通用,无需修改任何东西..当然,要写入自己的个性需求则自己改~~