正则过滤html标记

    class Class1
    {
        /// <summary>
        /// 去除HTML标记
        /// </summary>
        /// <param name="strHtml">包括HTML的源码 </param>
        /// <returns>已经去除后的文字</returns>
       public static string StripHTML(string strHtml)
        {
            string[] aryReg ={
         @"<script[^>]*?>.*?</script>",

          @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""'])(file://[""'tbnr]|[^/7])*?/7|/w+)|.{0})|/s)*?(///s*)?>",
          @"([\r\n])[\s]+",
          @"&(quot|#34);",
          @"&(amp|#38);",

          @"&(lt|#60);",
          @"&(gt|#62);", 
          @"&(nbsp|#160);", 
          @"&(iexcl|#161);",
          @"&(cent|#162);",
          @"&(pound|#163);",
          @"&(copy|#169);",
          @"&#(\d+);",
          @"-->",
          @"<!--.*\n"
        
         };

           string[] aryRep = {
           "",
           "",
           "",
           "\"",
           "&",
           "<",
           ">",
           " ",
           "\xa1",//chr(161),
           "\xa2",//chr(162),
          "\xa3",//chr(163),
           "\xa9",//chr(169),
           "",
           "\r\n",
           ""
          };

            string newReg = aryReg[0];
            string strOutput = strHtml;
            for (int i = 0; i < aryReg.Length; i++)
            {
                Regex regex = new Regex(aryReg[i], RegexOptions.IgnoreCase);
                strOutput = regex.Replace(strOutput, aryRep[i]);
            }

            strOutput.Replace("<", "");
            strOutput.Replace(">", "");
            strOutput.Replace("\r\n", "");


            return strOutput;
        }
    }

源：http://www.cnblogs.com/mishy/archive/2008/01/03/1024953.html