/// 
 /// 过滤标记 /// 
 /// 包括HTML，脚本，数据库关键字，特殊字符的源码  /// 
     
      已经去除标记后的文字
          public static string NoHTML(string Htmlstring)     {
   if (Htmlstring == null)         {
   return "";         } else         {
   //删除脚本             Htmlstring = Regex.Replace(Htmlstring, @"
     
      ]*?>.*?", "", RegexOptions.IgnoreCase); //删除HTML             Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);             Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);             Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);             Htmlstring = Regex.Replace(Htmlstring, @"
      
     

转自：http://hi.baidu.com/squirrel_/blog/item/7c4c083b9b8384e714cecb7f.html