/// <summary>/// 过滤标记/// </summary>/// <param name="NoHTML">包括HTML，脚本，数据库关键字，特殊字符的源码 </param>/// <returns>已经去除标记后的文字</returns>    public static string NoHTML(string Htmlstring)    {if (Htmlstring == null)        {return "";        }else        {//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 = Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);

//删除与数据库相关的词            Htmlstring = Regex.Replace(Htmlstring, "select", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "insert", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "delete from", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "count''", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "drop table", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "truncate", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "asc", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "mid", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "char", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "exec master", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "net localgroup administrators", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "and", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "net user", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "or", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "net", "", RegexOptions.IgnoreCase);//Htmlstring = Regex.Replace(Htmlstring,"*", "", RegexOptions.IgnoreCase);//Htmlstring = Regex.Replace(Htmlstring,"-", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "delete", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "drop", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, "script", "", RegexOptions.IgnoreCase);

//特殊的字符            Htmlstring = Htmlstring.Replace("<", "");            Htmlstring = Htmlstring.Replace(">", "");            Htmlstring = Htmlstring.Replace("*", "");            Htmlstring = Htmlstring.Replace("-", "");            Htmlstring = Htmlstring.Replace("?", "");            Htmlstring = Htmlstring.Replace(",", "");            Htmlstring = Htmlstring.Replace("/", "");            Htmlstring = Htmlstring.Replace(";", "");            Htmlstring = Htmlstring.Replace("*/", "");            Htmlstring = Htmlstring.Replace("\r\n", "");            Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

return Htmlstring;        }

    }