将开关后台服务改为实时响应

App.xaml.cs

@@ -66,10 +66,25 @@ public partial class App : Application
         
         MainWindow = Host.Services.GetRequiredService<MainView>();
         MainWindow.Show();
+
+        // 根据配置启动服务
+        var connectionSettings = PMSWPF.Config.ConnectionSettings.Load();
+        if (connectionSettings.EnableS7Service)
+        {
+            Host.Services.GetRequiredService<S7BackgroundService>().StartService();
+        }
+        if (connectionSettings.EnableMqttService)
+        {
+            Host.Services.GetRequiredService<MqttBackgroundService>().StartService();
+        }
     }
 
     protected override async void OnExit(ExitEventArgs e)
     {
+        // 停止服务
+        Host.Services.GetRequiredService<S7BackgroundService>().StopService();
+        Host.Services.GetRequiredService<MqttBackgroundService>().StopService();
+
         await Host.StopAsync();
         Host.Dispose();
         LogManager.Shutdown();
@@ -82,14 +97,8 @@ public partial class App : Application
         services.AddSingleton<NavgatorServices>();
         services.AddSingleton<IDialogService, DialogService>();
         services.AddSingleton<GrowlNotificationService>();
-        if (ConnectionSettings.Load().EnableS7Service)
+        services.AddSingleton<S7BackgroundService>();
-        {
+        services.AddSingleton<MqttBackgroundService>();
-            services.AddHostedService<S7BackgroundService>(); // Register as HostedService
-        }
-        if (ConnectionSettings.Load().EnableMqttService)
-        {
-            services.AddHostedService<MqttBackgroundService>();
-        }
         services.AddSingleton<MainViewModel>();
         services.AddSingleton<HomeViewModel>();
         services.AddSingleton<DevicesViewModel>();

Services/MqttBackgroundService.cs

@@ -17,7 +17,7 @@ namespace PMSWPF.Services
     /// <summary>
     /// MQTT后台服务，继承自BackgroundService，用于在后台管理MQTT连接和数据发布。
     /// </summary>
-    public class MqttBackgroundService : BackgroundService
+    public class MqttBackgroundService
     {
         // 数据服务实例，用于访问和操作应用程序数据，如MQTT配置和变量数据。
         private readonly DataServices _dataServices;
@@ -43,11 +43,9 @@ namespace PMSWPF.Services
         }
 
         /// <summary>
-        /// 后台服务的执行方法，当服务启动时调用。
+        /// 启动MQTT后台服务。
         /// </summary>
-        /// <param name="stoppingToken">用于取消操作的CancellationToken。</param>
+        public async void StartService()
-        /// <returns>表示异步操作的任务。</returns>
-        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
         {
             NlogHelper.Info("MqttBackgroundService started."); // 记录服务启动信息
 
@@ -63,15 +61,13 @@ namespace PMSWPF.Services
             _timer = new Timer(DoWork, null, TimeSpan.Zero, TimeSpan.FromSeconds(5)); // 每5秒轮询一次
 
             // 使服务保持运行，直到收到停止请求。
-            await Task.Delay(Timeout.Infinite, stoppingToken);
+            // await Task.Delay(Timeout.Infinite, stoppingToken);
         }
 
         /// <summary>
-        /// 后台服务的停止方法，当服务停止时调用。
+        /// 停止MQTT后台服务。
         /// </summary>
-        /// <param name="stoppingToken">用于取消操作的CancellationToken。</param>
+        public async void StopService()
-        /// <returns>表示异步操作的任务。</returns>
-        public override async Task StopAsync(CancellationToken stoppingToken)
         {
             NlogHelper.Info("MqttBackgroundService stopping."); // 记录服务停止信息
 
@@ -95,7 +91,7 @@ namespace PMSWPF.Services
             _mqttConfigurations.Clear();
             _mqttVariableData.Clear();
 
-            await base.StopAsync(stoppingToken);
+            
         }
 
         /// <summary>

Services/S7BackgroundService.cs

@@ -16,7 +16,7 @@ namespace PMSWPF.Services
     /// <summary>
     /// S7后台服务，继承自BackgroundService，用于在后台周期性地轮询S7 PLC设备数据。
     /// </summary>
-    public class S7BackgroundService : BackgroundService
+    public class S7BackgroundService
     {
         // 数据服务实例，用于访问和操作应用程序数据，如设备配置。
         private readonly DataServices _dataServices;
@@ -91,15 +91,13 @@ namespace PMSWPF.Services
         }
 
         /// <summary>
-        /// 后台服务的执行方法，当服务启动时调用。
+        /// 启动S7后台服务。
         /// </summary>
-        /// <param name="stoppingToken">用于取消操作的CancellationToken。</param>
+        public void StartService()
-        /// <returns>表示异步操作的任务。</returns>
-        protected override Task ExecuteAsync(CancellationToken stoppingToken)
         {
             NlogHelper.Info("S7后台服务正在启动。");
             // 创建一个CancellationTokenSource，用于控制轮询线程的取消。
-            _cancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(stoppingToken);
+            _cancellationTokenSource = new CancellationTokenSource();
 
             // 创建并启动轮询线程。
             _pollingThread = new Thread(() => PollingLoop(_cancellationTokenSource.Token))
@@ -107,8 +105,6 @@ namespace PMSWPF.Services
                                  IsBackground = true // 设置为后台线程，随主程序退出而退出
                              };
             _pollingThread.Start();
-
-            return Task.CompletedTask;
         }
 
         /// <summary>
@@ -307,11 +303,9 @@ namespace PMSWPF.Services
         }
 
         /// <summary>
-        /// 后台服务的停止方法，当服务停止时调用。
+        /// 停止S7后台服务。
         /// </summary>
-        /// <param name="stoppingToken">用于取消操作的CancellationToken。</param>
+        public void StopService()
-        /// <returns>表示异步操作的任务。</returns>
-        public override async Task StopAsync(CancellationToken stoppingToken)
         {
             NlogHelper.Info("S7 Background Service is stopping.");
 
@@ -332,7 +326,7 @@ namespace PMSWPF.Services
 
             _s7PlcClients.Clear(); // 清空PLC客户端字典。
 
-            await base.StopAsync(stoppingToken);
+            
         }
     }
 }

ViewModels/SettingViewModel.cs

@@ -7,17 +7,22 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using PMSWPF.Services;
 
 namespace PMSWPF.ViewModels;
 
 public partial class SettingViewModel : ViewModelBase
 {
     private ConnectionSettings _connectionSettings;
+    private readonly S7BackgroundService _s7BackgroundService;
+    private readonly MqttBackgroundService _mqttBackgroundService;
 
-    public SettingViewModel()
+    public SettingViewModel(S7BackgroundService s7BackgroundService, MqttBackgroundService mqttBackgroundService)
     {
         _connectionSettings = ConnectionSettings.Load();
         AvailableDbTypes = Enum.GetNames(typeof(SqlSugar.DbType)).ToList();
+        _s7BackgroundService = s7BackgroundService;
+        _mqttBackgroundService = mqttBackgroundService;
     }
 
     public List<string> AvailableDbTypes { get; set; }
@@ -116,6 +121,14 @@ public partial class SettingViewModel : ViewModelBase
                 _connectionSettings.EnableS7Service = value;
                 OnPropertyChanged();
                 _connectionSettings.Save();
+                if (value)
+                {
+                    _s7BackgroundService.StartService();
+                }
+                else
+                {
+                    _s7BackgroundService.StopService();
+                }
             }
         }
     }
@@ -130,6 +143,14 @@ public partial class SettingViewModel : ViewModelBase
                 _connectionSettings.EnableMqttService = value;
                 OnPropertyChanged();
                 _connectionSettings.Save();
+                if (value)
+                {
+                    _mqttBackgroundService.StartService();
+                }
+                else
+                {
+                    _mqttBackgroundService.StopService();
+                }
             }
         }
     }

Views/SettingView.xaml.cs

@@ -1,5 +1,6 @@
 using PMSWPF.ViewModels;
 using System.Windows.Controls;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace PMSWPF.Views;
 
@@ -8,6 +9,6 @@ public partial class SettingView : UserControl
     public SettingView()
     {
         InitializeComponent();
-        DataContext = new SettingViewModel();
+        DataContext = App.Current.Services.GetRequiredService<SettingViewModel>();
     }
 }