如何在URL重写后，form标记中的Action值也用虚拟地址？

http://blog.joycode.com/dotey/archive/2005/03/10/45572.aspx?Pending=true

http://blog.joycode.com/scottgu/archive/2007/03/01/94004.aspx

综合以上讨论，首先建立/App_Browsers/Form.broswer文件，其内容为：

< browsers >
     < browser  refID ="Default" >
         < controlAdapters >
             < adapter  controlType ="System.Web.UI.HtmlControls.HtmlForm"
                        adapterType ="FormRewriterControlAdapter"   />
         </ controlAdapters >
     </ browser >

</ browsers >

再建立FormRewriterControlAdapter类：

     public   class  FormRewriterControlAdapter : System.Web.UI.Adapters.ControlAdapter
    {
         protected   override   void  Render(HtmlTextWriter writer)
        {

             if  (writer  is  System.Web.UI.Html32TextWriter)
            {
                writer  =   new  FormFixerHtml32TextWriter(writer.InnerWriter);
            }
             else
            {
                writer  =   new  FormFixerHtmlTextWriter(writer.InnerWriter);
            }

             base .Render(writer);
        }
    }

     #region  FormFixerHtml32TextWriter
     internal   class  FormFixerHtml32TextWriter : System.Web.UI.Html32TextWriter
    {
         private   string  _url;  //  假的URL

         internal  FormFixerHtml32TextWriter(TextWriter writer)
            :  base (writer)
        {
            _url  =  HttpContext.Current.Request.RawUrl;
        }

         public   override   void  WriteAttribute( string  name,  string  value,  bool  encode)
        {
             //  如果当前输出的属性为form标记的action属性，则将其值替换为重写后的虚假URL
             if  (_url  !=   null   &&   string .Compare(name,  " action " ,  true )  ==   0 )
            {
                value  =  _url;
            }
             base .WriteAttribute(name, value, encode);
        }
    }
     #endregion

     #region  FormFixerHtmlTextWriter
     internal   class  FormFixerHtmlTextWriter : System.Web.UI.HtmlTextWriter
    {
         private   string  _url;
         internal  FormFixerHtmlTextWriter(TextWriter writer)
            :  base (writer)
        {
            _url  =  HttpContext.Current.Request.RawUrl;
        }

         public   override   void  WriteAttribute( string  name,  string  value,  bool  encode)
        {
             if  (_url  !=   null   &&   string .Compare(name,  " action " ,  true )  ==   0 )
            {
                value  =  _url;
            }

             base .WriteAttribute(name, value, encode);
        }
    }
     #endregion