使用新框架与技术代替旧框架与技术，实现涂装车间后道标签扫码程序

RIZO_Application.Modules.Base/ViewModels/PrintViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Prism.Events;
+using Prism.Regions;
+using RIZO_Application.Core;
+using RIZO_Application.Core.Mvvm;
+
+namespace RIZO_Application.Modules.Base.ViewModels
+{
+    public class PrintViewModel : RegionViewModelBase
+    {
+        private readonly IEventAggregator _eventAggregator;
+        private SubscriptionToken _token;
+
+        public PrintViewModel(
+            IRegionManager regionManager,
+            IEventAggregator eventAggregator) 
+            : base(regionManager)
+        {
+            _eventAggregator = eventAggregator;
+            // 订阅事件，使用UI线程处理，保持强引用
+            _token = _eventAggregator.GetEvent<SystemLogEvent>().Subscribe(OnReceived, ThreadOption.UIThread, true);
+        }
+
+        private void OnReceived(string message)
+        {
+
+        }
+
+        public void Destroy()
+        {
+            _token?.Dispose();
+        }
+    }
+}