捕获silverlight滚轮事件

 

silverlight小技巧

捕获silverlight滚轮事件

1. 在页面初始化时添加代码
• HtmlPage.Window.AttachEvent("DOMMouseScroll", OnMouseWheel);
• HtmlPage.Window.AttachEvent("onmousewheel", OnMouseWheel);
  
• HtmlPage.Document.AttachEvent("onmousewheel", OnMouseWheel);
  
2. Mozilla/Safari浏览器监听detail属性，IE/Opera浏览器监听wheelDelta属性

private void OnMouseWheel(object sender, HtmlEventArgs args)
{
    double mouseDelta = 0;
    ScriptObject e = args.EventObject;
    // Mozilla and Safari   
    if (e.GetProperty("detail") != null)
    {
        mouseDelta = ((double)e.GetProperty("detail"));
    } // IE and Opera   
    else if (e.GetProperty("wheelDelta") != null)
    {
        mouseDelta = ((double)e.GetProperty("wheelDelta"));
    }
    mouseDelta = Math.Sign(mouseDelta);
}