C# - 如何更改HTML元素属性

为了从服务器端访问这些控件,您需要使它们成为runat ="server"

  
               
  
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在代码隐藏中:

foreach(Control ctrl in nav.controls)
{
   if(!ctrl is HtmlAnchor)
   {
      string url = ((HtmlAnchor)ctrl).Href;
      if(url == GetCurrentPage())  // <-- you'd need to write that
         ctrl.Parent.Attributes.Add("class", "active");
   }
}