將ASP.NET頁面內容輸出到字串中

以下是一個頁面code-behind的程式碼範例，其中利用了這個函數來對頁面的輸出內容進行過濾，經此處理後的內容才最終顯示在瀏覽器中。

 

public partial class FilterDemo : System.Web.UI.Page

{

  HtmlTextWriter _oldWriter = null;

  StringWriter _stringWriter = new StringWriter();

  protected override HtmlTextWriter CreateHtmlTextWriter(TextWriter tw)

  {

    _oldWriter = base.CreateHtmlTextWriter(tw);

    return base.CreateHtmlTextWriter(_stringWriter);

  }

  protected override void Render(HtmlTextWriter writer)

  {

    base.Render(writer);

    string html = _stringWriter.ToString();

    html = html.Replace("REPLACE ME!", "IT WAS REPLACED!");

    _oldWriter.Write(html);

  }

}