全局组件通讯研究

linesider_screen_bankend/Modules/linesider_screen_bankend.Modules.ModuleName/ViewModels/SettingsPageViewModel.cs

@@ -1,7 +1,11 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Diagnostics;
+using System.Windows;
+using Dm;
 using linesider_screen_bankend.Core.Mvvm;
 using linesider_screen_bankend.Services.Interfaces;
+using Prism.Commands;
 using Prism.Ioc;
 using Prism.Regions;
 
@@ -9,6 +13,7 @@ namespace linesider_screen_bankend.Modules.ModuleName.ViewModels
 {
     public class SettingsPageViewModel : RegionViewModelBase
     {
+
         private List<string> _portList;
         public List<string> PortList
         {
@@ -56,15 +61,20 @@ namespace linesider_screen_bankend.Modules.ModuleName.ViewModels
             set { SetProperty(ref _mqtttTopic, value); }
         }
 
+        // 按钮事件
+        private DelegateCommand _testCommand;
+        public DelegateCommand TestCommand =>
+        _testCommand ?? (_testCommand = new DelegateCommand(ExecuteTestCommand));
 
 
-
-        IPortService _portService;
-        public SettingsPageViewModel(IRegionManager regionManager, IPortService portService) :
+        private IPortService _portService;
+        private IPrintService _printService;
+        public SettingsPageViewModel(IRegionManager regionManager, IPortService portService, IPrintService printService) :
             base(regionManager)
         {
             Debug.WriteLine("viewModel方法启动测试1");
             _portService = portService;
+            _printService = printService;
             Message = "139.224.232.211";
             InitializePortAndBaudLists();
         }
@@ -74,10 +84,15 @@ namespace linesider_screen_bankend.Modules.ModuleName.ViewModels
             PortList = _portService.GetPortOptions();
             BaudList = _portService.GetBaudOptions();
         }
-
         public override void OnNavigatedTo(NavigationContext navigationContext)
         {
             //do something
         }
+
+        // 按钮事件
+        void ExecuteTestCommand()
+        {
+            _printService.DoPrint("测试地址");
+        }
     }
 }