public static string ParseRazor(HttpContext context,
   string csHtmlVirtualPath, object model = null)
  {
   string fullpath = context.Server.MapPath(csHtmlVirtualPath);//将虚拟路径转换为绝对路径
   string cshtml = File.ReadAllText(fullpath); //将整个cshtml代码读取出来
   string cacheName = fullpath + File.GetLastWriteTime(fullpath);//返回上次写入指定文件或目录的日期和时间。
   string html = Razor.Parse(cshtml, model, cacheName);
   return html;
  }
  /// <summary>
  /// 直接将读取的cshtml代码转换完后，直接返回给客户端
  /// </summary>
  /// <param name="context"></param>
  /// <param name="csHtmlVirtualPath"></param>
  /// <param name="model"></param>
  public static void OutputRazor(HttpContext context,
   string csHtmlVirtualPath, object model = null)
  {
   string html = ParseRazor(context, csHtmlVirtualPath, model);
   context.Response.Write(html);    
  }