url重写后页面回传问题

最近在做项目时遇到了URL重写后当页面回传时，url又刷回原值；这个问题困扰了很久，终于找到解决办法了。具体办法如下：可以通过自定义页面基类，重写默认的HtmlTextWriter方法，重写属性输出WriteAttribute(string name, string value, bool encode)方法，当输出action时，将action属性的值强制转换为当前虚URL(HttpContext.Current.Request.RawUrl，上面的~/showVisasAll_(\w+)\.aspx)

最后就是让所有的页面都调用这个基类，修改一下Web.config就好了
<!-- Openlab.Controls.OLPage为页面基类，Openlab.Controls为基类所在dll -->
<pages pageBaseType="Openlab.Controls.OLPage, Openlab.Controls"/>

附页面基类完整代码（参考CS代码完成）：

 
   

  
    
  
  
    using
  
     System; 
  
    using
  
     System.IO; 
  
    using
  
     System.Web; 
  
    using
  
     System.Web.UI;  
  
    namespace
  
     Openlab.Controls 
  
    ...
  
    {  /**//// <summary>  /// 页面基类  /// </summary>  public class OLPage : Page  ...{  public OLPage()  ...{  }   Render#region Render   /**//// <summary>  /// 重写默认的HtmlTextWriter方法，修改form标记中的value属性，使其值为重写的URL而不是真实URL。  /// </summary>  /// <param name="writer"></param>  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);  }  #endregion    }   FormFixers#region FormFixers   FormFixerHtml32TextWriter#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   FormFixerHtmlTextWriter#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   #endregion }