WPF:求教如何注销一个控件上的指定事件？

Question

比如如何注销一个按钮btn上的Click事件？

Answer 1

button1.Click += new System.EventHandler(this.button1_Click);//注册
button1.Click -= new System.EventHandler(this.button1_Click);//注销

Answer 2

我的意思是this.button1_Click是不能得到的。。

Answer 3

   
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("你好");
            this.button1.Click-=new RoutedEventHandler(button1_Click);
        }

Answer 4

假如我不知道调用的是button1_Click
应该怎么注销？

Answer 5

你那button1.Enable=false算了

Answer 6

 static void Main(string[] args)
        {
            System.Windows.Forms.Button btn = new System.Windows.Forms.Button();
            btn.Click += new EventHandler(btn_Click);
            btn.Click += new EventHandler(btn_Click2);
            btn.Click += new EventHandler(btn_Click3);
            PropertyInfo pi = btn.GetType().GetProperty("Events", BindingFlags.Instance | BindingFlags.NonPublic);
            EventHandlerList ehl = (EventHandlerList)pi.GetValue(btn, null);
            FieldInfo fieldInfo = (typeof(System.Windows.Forms.Control)).GetField("EventClick", BindingFlags.Static | BindingFlags.NonPublic);
            Delegate d = ehl[fieldInfo.GetValue(null)];
            foreach (Delegate del in d.GetInvocationList())
                Console.WriteLine(del.Method.Name);
        }        static void btn_Click(object sender, EventArgs e)
        {
            Console.WriteLine("Click1");
        }        static void btn_Click2(object sender, EventArgs e)
        {
            Console.WriteLine("Click2");
        }        static void btn_Click3(object sender, EventArgs e)
        {
            Console.WriteLine("Click3");
        }