WPF框架Prism中使用MVVM架构

    public class TestViewModel : ViewModelBase
    {
        private string _message;

        public string Message
        {
            get { return _message; }
            set { _message = value; RaisePropertyChanged(); }
        }
    }

    public class TestViewModel : BindableBase
    {
        private string _message;

        public string Message
        {
            get { return _message; }
            set { _message = value; RaisePropertyChanged(); }
        }
    }

    public class TestViewModel : ViewModelBase
    {
        public RelayCommand SendCommand { get; set; }

        public RelayCommand<string> SendMessageCommand { get; set; }
    }

    public class TestViewModel : ViewModelBase
    {
        public DelegateCommand SendCommand { get; set; }

        public DelegateCommand<string> SendMessageCommand { get; set; }
    }

//创建事件
public class SavedEvent : PubSubEvent<string> { }

//发布
IEventAggregator.GetEvent<SavedEvent>().Publish("some value");

//订阅
IEventAggregator.GetEvent<SavedEvent>().Subscribe(.Subscribe(message=>
            {
                //do something
            });

eventAggregator.GetEvent<MessageSentEvent>()
               .Subscribe(arg =>
               {
                   //do something
               },
               ThreadOption.PublisherThread,
               false,
               //设置条件为token等于“MessageListViewModel” 则接收消息
               message => message.token.Equals(nameof(MessageListViewModel)));

var event = IEventAggregator.GetEvent<MessageSentEvent>();

event.Subscribe(OnMessageReceived);

event.Unsubscribe(OnMessageReceived);

var _event = eventAggregator.GetEvent<MessageSentEvent>();

var token = _event.Subscribe(OnMessageReceived);

_event.Unsubscribe(token);