App_win_iot_V2.0/IOTContainer/App.xaml.cs

using IOTContainer.Common;
using Microsoft.VisualBasic.ApplicationServices;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Security.Principal;
using System.Threading.Tasks;
using System.Windows;

namespace IOTContainer
{
    public class EntryPoint
    {
        [STAThread]
        public static void Main(string[] args)
        {
            try
            {
                SingleInstanceManager manager = new SingleInstanceManager();

                var identity = WindowsIdentity.GetCurrent();
                var principal = new WindowsPrincipal(identity);
                if (principal.IsInRole(WindowsBuiltInRole.Administrator))
                {
                    // 当前正在以管理员权限运行。
                }
                manager.Run(args);
            }
            catch (Exception ex)
            {
                Log.MyLog.WriteLogFile("出错：" + ex);
            }
            
        }
    }
    /// <summary>
    /// App.xaml 的交互逻辑
    /// </summary>
    public partial class App : Application
    {
        public App()
        {
            InitializeComponent();
        }
        public void Activate()
        {
            this.MainWindow.Show();
            this.MainWindow.Activate();
        }
    }

    public class SingleInstanceManager :
        Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase
    {
        private App wpfapp; // 这才是真正的WPF Application
        /// <summary>
        /// 单例程序
        /// </summary>
        public SingleInstanceManager()
        {
            this.IsSingleInstance = true;
        }

        // 第一次打开调这个方法
        protected override bool OnStartup(
            Microsoft.VisualBasic.ApplicationServices.StartupEventArgs e)
        {
            wpfapp = new App();
            wpfapp.Run();

            return false;
        }

        /// <summary>
        /// 当有其他应用程序实例化时，则触发此事件，弹出已存在的实例窗口
        /// </summary>
        /// <param name="eventArgs"></param>
        protected override void OnStartupNextInstance(StartupNextInstanceEventArgs eventArgs)
        {
            // Subsequent launches
            base.OnStartupNextInstance(eventArgs);
            //wpfapp.Activate();
        }
    }
}