asp.net如何获取所有html控件

        Type pageType = this.GetType();
        System.Reflection.FieldInfo[] fields = pageType.GetFields(System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance );        
        foreach (System.Reflection.FieldInfo f in fields)
        {
            if (f.GetValue(this) is System.Web.UI.HtmlControls.HtmlControl)
                Response.Write(f.Name + "<br />");
        }