Galasoft Messenger显示窗口

Question

我想从ViewModel打开一个窗口。 如何使用Galasoft Messenger创建并显示它？

public partial class View { 
    public View() { 
     InitializeComponents(); 
     //Register Open message 
    } 

    //This is called when ViewModel sends a message 
    public void OpenView() { 
     new View().Show(); 
    } 
} 

public class ViewModel { 
    public ViewModel() { 
     //Send message to open some view 
    } 
} 

Answer 1

这种情况并不需要将一个对象从ViewModel传递给View;因此，只注册类型对象，传递null，但令牌是关键。

public partial class View { 
    public View() { 
     InitializeComponents(); 
     //Register Open message BEFORE ViewModel calls Messenger.Default.Send 
     Messenger.Default.Register<object>(this, ViewModel.OpenViewToken, p => { OpenView(); }); 
    } 

    //This is called when ViewModel sends a message 
    public void OpenView() { 
     new View().Show(); 
    } 
} 

public class ViewModel { 
    public static readonly Guid OpenViewToken = Guid.NewGuid(); 
    public ViewModel() { 
     Messenger.Default.Send<object>(null, OpenViewToken); 
    } 
}