VacuumPressureMembranePoreSizeAnalyzer/App.xaml.cs

using MembranePoreTester.Communication;
using MembranePoreTester.Models;
using MembranePoreTester.Views;
using Microsoft.Extensions.Configuration;
using OfficeOpenXml;
using System;
using System.IO;
using System.Windows;

namespace MembranePoreTester
{
    public partial class App : Application
    {
        public static UserRole CurrentUserRole { get; set; } = UserRole.Operator;

        public static IPlcService PlcService { get; private set; }
        public static PlcConfiguration PlcConfig { get; private set; }

        protected override async void OnStartup(StartupEventArgs e)
        {
            ExcelPackage.LicenseContext = LicenseContext.NonCommercial;

            base.OnStartup(e);

            // 防止在登录窗口关闭时应用程序因没有窗口而自动退出
            ShutdownMode = ShutdownMode.OnExplicitShutdown;

            // 显示登录窗口，验证用户身份
            var loginWindow = new LoginWindow();
            if (loginWindow.ShowDialog() != true)
            {
                Shutdown();
                return;
            }

            // 登录成功后初始化数据库和PLC连接
            using var db = new AppDbContext();
            db.Database.EnsureCreated();

            var builder = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

            var configuration = builder.Build();
            PlcConfig = configuration.GetSection("PlcSettings").Get<PlcConfiguration>();

            if (PlcConfig == null)
                throw new InvalidOperationException("PLC settings missing in appsettings.json");

            PlcService = new ModbusTcpPlcService(PlcConfig);

            var plcService = App.PlcService as ModbusTcpPlcService;
            try
            {
                await plcService.EnsureConnectedAsync();
            }
            catch (Exception ex)
            {
                MessageBox.Show($"PLC 连接失败：{ex.Message}");
            }

            // 启动主窗口，设置为应用程序的主窗口并恢复默认的退出模式
            var mainWindow = new MainWindow();
            MainWindow = mainWindow;
            ShutdownMode = ShutdownMode.OnMainWindowClose;
            mainWindow.Show();
        }

        protected override void OnExit(ExitEventArgs e)
        {
            (PlcService as IDisposable)?.Dispose();
            base.OnExit(e);
        }
    }
}