[转]C# 替换去除HTML标记方法(正则表达式)

using System.Text.RegularExpressions;     //包含正则表达式   

 public static string NoHTML(string Htmlstring) //去除HTML标记   

      {   

 //删除脚本   

          Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);   

 //删除HTML   

          Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"([rn])[s]+", "", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", """, RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "xa1", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "xa2", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "xa3", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "xa9", RegexOptions.IgnoreCase);   

          Htmlstring = Regex.Replace(Htmlstring, @"&#(d+);", "", RegexOptions.IgnoreCase);   

          Htmlstring.Replace("<", "");   

          Htmlstring.Replace(">", "");   

          Htmlstring.Replace("rn", "");   

          Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();   

 return Htmlstring;   

      }  

using System.Text.RegularExpressions;     //包含正则表达式

 public static string NoHTML(string Htmlstring) //去除HTML标记

      {

 //删除脚本

          Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);

 //删除HTML

          Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"([rn])[s]+", "", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", """, RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "xa1", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "xa2", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "xa3", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "xa9", RegexOptions.IgnoreCase);

          Htmlstring = Regex.Replace(Htmlstring, @"&#(d+);", "", RegexOptions.IgnoreCase);

          Htmlstring.Replace("<", "");

          Htmlstring.Replace(">", "");

          Htmlstring.Replace("rn", "");

          Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

 return Htmlstring;

      }

 示例:

C#代码  

/// <summary>   

 /// 将所有HTML标签替换成""   

 /// </summary>   

 /// <param name="strHtml"></param>   

 /// <returns></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*)?>",   

 @"([rn])[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),   

 "",   

 "rn",   

 "" 

     };   

 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("rn", "");   

 return strOutput;   

      }