override render 方法

有时候需要在ASP.net  或MVC 中在页面呈现前，把要显示的内容作一个拦截，更改内容后显示。

只要重写

protected override void Render(System.Web.UI.HtmlTextWriter writer) 方法。

 

例如： 我把返回的内容中的html 的标题进行改变，可以如下操作

 

protected override void Render(System.Web.UI.HtmlTextWriter writer)
       {
           StringBuilder sb = new StringBuilder();
           HtmlTextWriter tw = new HtmlTextWriter(new System.IO.StringWriter(sb));
           //Render the page to the new HtmlTextWriter which actually writes to the stringbuilder
           base.Render(tw);

           //Get the rendered content
           string sContent = sb.ToString();

           //set title
           sContent = Regex.Replace(sContent, @"(?<=title>)(.*?)(?=</title>)","我的标题");
           //Now output it to the page, if you want
           writer.Write(sContent);
       }

感谢google，再一次BS baidu