public static string FilterSpecial(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, @"[\t]", "", 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("*/", "");

Htmlstring = Htmlstring.Replace("\r\n", "");

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

return Htmlstring;

}

}