87 lines
2.5 KiB
C#
87 lines
2.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Data;
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using System.Diagnostics;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Windows;
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namespace 软件系统客户端Wpf
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{
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/// <summary>
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/// App.xaml 的交互逻辑
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/// </summary>
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public partial class App : Application
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{
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/// <summary>
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/// 指示了应用程序退出时的代码
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/// </summary>
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public static int QuitCode { get; set; } = 0;
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protected override void OnStartup(StartupEventArgs e)
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{
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base.OnStartup(e);
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//捕获未处理的异常
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AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
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Process process = Process.GetCurrentProcess();
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//遍历应用程序的同名进程组
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foreach (Process p in Process.GetProcessesByName(process.ProcessName))
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{
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//不是同一进程则关闭刚刚创建的进程
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if (p.Id != process.Id)
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{
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//此处显示原先的窗口需要一定的时间，不然无法显示
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ShowWindowAsync(p.MainWindowHandle, 9);
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SetForegroundWindow(p.MainWindowHandle);
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Thread.Sleep(10);
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Current.Shutdown();//关闭当前的应用程序
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return;
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}
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}
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P1:
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LoginWindow lw = new LoginWindow();
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bool? result = lw.ShowDialog();
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if (result.Value == true)
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{
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MainWindow mw = new MainWindow();
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MainWindow = mw;
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mw.ShowDialog();
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if (QuitCode == 1)
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{
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//继续显示登录窗口
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QuitCode = 0;
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goto P1;
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}
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else
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{
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Current.Shutdown();//关闭当前的应用程序
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}
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}
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else
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{
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Environment.Exit(0);
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}
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}
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private void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
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{
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}
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[DllImport("User32.dll")]
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private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
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[DllImport("User32.dll")]
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private static extern bool SetForegroundWindow(IntPtr hWnd);
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}
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}
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