App.xaml.cs

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using GZKL.Client.UI.Common;

namespace GZKL.Client.UI
{
    /// <summary>
    /// App.xaml 的交互逻辑
    /// </summary>
    public partial class App : Application
    {
        private static Mutex AppMutex;
        protected override void OnStartup(StartupEventArgs e)
        {
            AppMutex = new Mutex(true, "GZKL.Client.UI", out var createdNew);

            if (!createdNew)
            {
                var current = Process.GetCurrentProcess();

                foreach (var process in Process.GetProcessesByName(current.ProcessName))
                {
                    if (process.Id != current.Id)
                    {
                        Win32Helper.SetForegroundWindow(process.MainWindowHandle);
                        break;
                    }
                }
                Shutdown();
            }
        }
    }
}