MeterVision_v2/MeterVision/App.xaml.cs

using MeterVision.Dlg;
using MeterVision.Util;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Threading;

namespace MeterVision
{
    /// <summary>
    /// App.xaml 的交互逻辑
    /// </summary>
    public partial class App : Application
    {
        // protected override void OnStartup(StartupEventArgs e)
        //{
        //    base.OnStartup(e);

        //    this.DispatcherUnhandledException += new DispatcherUnhandledExceptionEventHandler(App_DispatcherUnhandledException);
        //    // 设置许可证上下文为非商业用途
        //    //ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
        //}

        private static Mutex mutex = new Mutex(true, "{E1805A91-1078-417D-9B65-43FCFCA504CC_tt}");
        protected override void OnStartup(StartupEventArgs e)
        {
            if (!mutex.WaitOne(TimeSpan.Zero, true))
            {
                //如果另一个实例已经拥有这个互斥锁，那么当前实列将不会继续运行
                MessageBox.Show("程序已经在运行。");
                Current.Shutdown();
                return;
            }

            base.OnStartup(e);
            this.DispatcherUnhandledException += new DispatcherUnhandledExceptionEventHandler(App_DispatcherUnhandledException);


            MainWindow mainWindow = new MainWindow();
            this.MainWindow = mainWindow;

            // 检查是否已注册
            if (LicenseMana.IsLicensed())
            {
                // 已注册，显示主界面
                mainWindow.Show();
            }
            else
            {
                // 未注册，弹出注册对话框
                RegisterDlg registerDlg = new RegisterDlg();
                bool? result = registerDlg.ShowDialog();

                if (result == true)
                {
                    // 用户成功注册，显示主界面
                    mainWindow.Show();
                }
                else
                {                    
                    Shutdown();
                }
            }
            //---------------------------------------------------------------------------------
        }

        protected override void OnExit(ExitEventArgs e)
        {
            //释放互斥锁
            if(mutex != null)
            {
                mutex.ReleaseMutex();
                mutex.Close();
            }
            base.OnExit(e);
        }


        private void App_DispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
        {
            // 检查异常类型
            if (e.Exception is AccessViolationException)
            {
                // 记录或处理访问违规错误
                MessageBox.Show("访问无效内存，程序即将停止。", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                e.Handled = true;  // 防止程序崩溃
            }
            else
            {
                // 其他异常处理
                MessageBox.Show($"发生错误: {e.Exception.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                e.Handled = true;  // 防止程序崩溃
            }
        }



    }
}