asp.net 字符串过滤器代码,Asp.Net代码库,德仔网

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【Asp.Net】 asp.net 字符串过滤器
作者:Dezai.CN / 发布于2012/7/31/ 422
asp.net 字符串过滤器
<div>/// <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, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
 Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
 Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);</div>
<div> 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);</div>
<div> //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);</div>
<div> //特殊的字符
 Htmlstring = Htmlstring.Replace("<", "&lt;");
 Htmlstring = Htmlstring.Replace(">", "&gt;");
 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();</div>
<div> return Htmlstring;
 }
<div> }
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　字符串过滤器　
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