SiteMapPath动态添加查询串

 protected void SiteMapPath1_ItemDataBound(object sender, SiteMapNodeItemEventArgs e)
        {
            try
            {
                HyperLink myhl = (HyperLink)e.Item.Controls[0];
                if (myhl != null)
                {

               
                    string myurl = HttpContext.Current.Request.Url.Query;
                    myhl.NavigateUrl += myurl.Equals(string.Empty) ? "" : myurl;

                }
            }
            catch
            { }
        }