Prism 基础知识学习发布订阅

Posted 2023-03-18 聆听微风

Prism 基础知识学习（五）发布订阅

在 ViewBViewModel.cs中

    public class ViewBViewModel : IDialogAware
    
        /// <summary>
        /// 发送消息
        /// </summary>
        /// <param name="agregator"></param>
        public ViewBViewModel(IEventAggregator agregator)
        
            agregator.GetEvent<MessageEvent>().Publish("Hellow");
        

        public string Title  get; set; 


        public event Action<IDialogResult> RequestClose;

        public bool CanCloseDialog()
        
            return true;
        

        public void OnDialogClosed()
        

        

        public void OnDialogOpened(IDialogParameters parameters)
        
        

在 ViewC.xaml.cs中

    public partial class ViewC : UserControl
    
        public ViewC(IEventAggregator eventAggregator)
        
            InitializeComponent();
            eventAggregator.GetEvent<MessageEvent>().Subscribe(arg =>
                
                    MessageBox.Show($"接收到消息:arg");
                
                );
        
    

新建类 MessageEvent.cs

namespace ModuleB

    public class MessageEvent:PubSubEvent<string>