控件动态创建与删除

private void Button_Add_Click(object sender, System.Windows.RoutedEventArgs e)  
        {  
            Button btn = new Button();  
            //btn.Name = "newButton";//这样设置则注册名字可为：canvas.RegisterName(btn.Name, btn);
            btn.Width = 100;  
            btn.Height= 50;  
            canvas.Children.Add(btn);  
            canvas.RegisterName("newButton", btn);//注册名字，以便以后使用   
        }  
 
        private void Button_Remove_Click(object sender, RoutedEventArgs e)  
        {  
            Button btn = canvas.FindName("newButton") as Button;//找到刚新添加的按钮   
            if (btn != null)//判断是否找到，以免在未添加前就误点了   
            {  
                canvas.Children.Remove(btn);//移除对应按钮控件   
                canvas.UnregisterName("newButton");//还需要把对用的名字注销掉，否则再次点击Button_Add会报错   
            }  
        }

　　　　RegisterName中的第一个重载不能为“111”之类的可强制转换为int的string。