App.xaml.cs

@@ -1,4 +1,6 @@
 using MembranePoreTester.Communication;
+using MembranePoreTester.Models;
+using MembranePoreTester.Views;
 using Microsoft.Extensions.Configuration;
 using OfficeOpenXml;
 using System;
@@ -9,18 +11,31 @@ 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 async override void OnStartup(StartupEventArgs e)
+        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(); // 自动建表
+            db.Database.EnsureCreated();
 
             var builder = new ConfigurationBuilder()
                 .SetBasePath(Directory.GetCurrentDirectory())
@@ -43,6 +58,12 @@ namespace MembranePoreTester
             {
                 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)