ScrollViewer在滾動時不觸發MouseWheel事件

Question

ScrollViewer的MouseWheel事件僅在滾動條位於其軌道的末端（頂部或底部/左側或右側）時纔會觸發。 MouseWheel事件在介於兩者之間的任何位置時不會觸發。

有沒有人有任何線索如何捕捉滾動時，它是由鼠標滾輪造成的？

Answer 1

您需要添加以下代碼捕獲滾動事件

public MainPage() 
    { 
     InitializeComponent(); 
     HtmlPage.Window.AttachEvent("DOMMouseScroll", OnMouseWheel); 
     HtmlPage.Window.AttachEvent("onmousewheel", OnMouseWheel); 
     HtmlPage.Document.AttachEvent("onmousewheel", OnMouseWheel); 
     } 

private void OnMouseWheel(object sender, HtmlEventArgs args) 
     { 
     // Your code goes here 
     } 

參考：http://blog.thekieners.com/2009/04/06/how-to-enable-mouse-wheel-scrolling-in-silverlight-without-extending-controls/

要真正獲得完整的滾動正常工作（不使用鼠標滾輪事件搞亂），看到我的回答這個問題 - How can I get the mouse wheel to work correctly with the Silverlight 4 ScrollViewer

Answer 2

滾動查看器實際上正在發射事件。事件正在處理中，因此，處理程序將不會被調用。解決方法是使用AddHandler方法添加處理程序。

除了使用UIElement.MouseWheel Event的，使用UIElement.AddHandler method，就像這樣：

MyScrollViewer.AddHandler(FrameworkElement.MouseWheelEvent, 
    delegate(object sender, MouseWheelEventArgs e) 
    { 
     //if e.Handled == true then the page was actually scrolled, 
     // otherwise, the scrollviewer is either at the beginning or at the end 
     if (e.Handled == true) 
     { 
      //Here, you can do what you need 
     } 
    }, 
true); 

Answer 3

@ davidle1234：

public delegate void SVMouseWheelDelegate(object sender, MouseWheelEventArgs e); 
    public SVMouseWheelDelegate SVMouseWheelHandler { get; set; } 

    private void SVMouseWheelHandlerLogic(object sender, MouseWheelEventArgs e) 
    { 
     //if e.Handled == true then the page was actually scrolled, 
     // otherwise, the scrollviewer is either at the beginning or at the end 
     if (e.Handled == true) 
     { 
      //Here, you can do what you need 
     } 
    } 

，並使用它，像這樣：

MyScrollViewer.AddHandler(FrameworkElement.MouseWheelEvent, SVMouseWheelHandler, true);