如何通過代碼

Question

一個完整的例子

public delegate void mouseup_delegate(object obj, MouseButtonEventArgs args); 

    constructor() 
    { 
     TextBlock text_block = new TextBlock() { Text = "aa" }; 
     Style style = new Style(); 
     //style.Setters.Add(new EventSetter(){Event=TextBlock.MouseUpEvent, Handler=new mouseup_delegate(this.textblockClicked)}); 
     style.Setters.Add(new EventSetter(TextBlock.MouseUpEvent, new mouseup_delegate(this.textblockClicked))); 
     text_block.Style = style; 
    } 

    public void textblockClicked(object sender, MouseButtonEventArgs args) 
    { 
     MessageBox.Show("mouse up"); 
    } 

添加eventsetter但是當我運行應用程序時，一個異常thown：處理器類型無效

什麼不對的代碼？

Answer 1

EventSetter預計您提供的代表是MouseButtonEventHandler而不是mouseup_delegate。