.net 字符串过滤标记(包括HTML，脚本，数据库关键字，特殊字符的源码)

/// <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 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, @"([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 = Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);

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

Htmlstring = Regex.Replace(Htmlstring, "/r", "", RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, "/n", "", 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("rn", "");

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

return Htmlstring;

}

}