清除 HTML 标记函数

 public static string NoHTML(string Htmlstring) 
    { 

        //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, @"([/r/n])[/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("/r/n", "");

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

        return Htmlstring;

    }