利用正则表达式去掉html代码

using System.Text.RegularExpressions;//需要引用

  // 利用正则表达式去掉"<"和">"之间的内容
  private string StripHT(string strHtml)
  {
    Regex regex=new Regex("<.+?>",RegexOptions.IgnoreCase);
   string strOutput=regex.Replace(strHtml,"");
   return strOutput;
   }


//方法二(不知为什么此方法占用CPU100%)

public static string DropHTML(string strHtml)
  {
   string [] aryReg ={
          @"<script[^>]*?>.*?</script>",
          @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""''])(\\[""''tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>",
          @"([\r])[\s]+",
          @"&(quot|#34);",
          @"&(amp|#38);",
          @"&(lt|#60);",
          @"&(gt|#62);",
          @"&(nbsp|#160);",
          @"&(iexcl|#161);",
          @"&(cent|#162);",
          @"&(pound|#163);",
          @"&(copy|#169);",
          @"&#(\d+);",
          @"-->",
          @"<!--.*"         
          };

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

   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","");
   return strOutput;
      
   }

http://www.cnblogs.com/wang123/archive/2007/09/19/898668.html