添加了防止短时间内重复调用

App.xaml.cs

@@ -81,7 +81,7 @@ public partial class App : Application
         services.AddSingleton<IDialogService, DialogService>();
         services.AddSingleton<GrowlNotificationService>();
         services.AddHostedService<S7BackgroundService>(); // Register as HostedService
-        // services.AddHostedService<MqttBackgroundService>();
+        services.AddHostedService<MqttBackgroundService>();
         services.AddSingleton<MainViewModel>();
         services.AddSingleton<HomeViewModel>();
         services.AddSingleton<DevicesViewModel>();

Services/MqttBackgroundService.cs

@@ -129,7 +129,7 @@ namespace PMSWPF.Services
 
                                 // 发布MQTT消息。
                                 await client.PublishAsync(message);
-                                NlogHelper.Info($"Published {variable.Name} = {variable.DataValue} to {topic}/{variable.Name}"); // 记录发布信息
+                                NlogHelper.Info($"Published {variable.Name} = {variable.DataValue} to {topic}/{variable.Name}",throttle:true); // 记录发布信息
                                 variable.IsModified = false; // 发布后重置修改标志。
                             }
                         }