C# WPF MVVM模式Prism框架下事件发布与订阅

 public class PersonInfo
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public string Sex { get; set; }

        public override string ToString()
{
            string report = $"[Name] = [{Name}],[Age] = [{Age}],[Sex] = [{Sex}]";
            return report;
        }

    }
    public class PersonInfoEven : PubSubEvent<PersonInfo>
    {

    }

 this.eventAggregator = ServiceLocator.Current.GetInstance<IEventAggregator>();

 eventAggregator.GetEvent<PersonInfoEven>().Subscribe(ShowNews);

   private void ShowNews(PersonInfo obj)
        {
            TxtLabel = $"{obj.ToString()}";
        }

//创建一个命令，当执行该命令时执行发布事件的逻辑     
PubSubEventCommand = new DelegateCommand(PubSubEventMessage);

//发布事件方法
private void PubSubEventMessage()
        {
           
            eventAggregator.GetEvent<PersonInfoEven>().Publish(new PersonInfo() {Name ="zyr",Age = 18,Sex = "nan" });
        }

eventAggregator.GetEvent<PersonInfoEven>().Unsubscribe(ShowNews);//解除订阅