本文实例讲述了ASP.NET过滤HTML字符串的方法，供大家参考使用，具体代码如下：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | ///
<summary>去除HTML标记/// ///
</summary> ///
<param name="Htmlstring">包括HTML的源码</param> ///
<returns>已经去除后的文字</returns> public static string GetNoHTMLString(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;} ///
<summary>获取显示的字符串，可显示HTML标签，但把危险的HTML标签过滤，如iframe,script等。/// ///
</summary>///
<param name="str">未处理的字符串</param>///
<returns></returns>public static string GetSafeHTMLString(string str){ str
= Regex.Replace(str, @"<applet[^>]*?>.*?</applet>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<body[^>]*?>.*?</body>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<embed[^>]*?>.*?</embed>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<frame[^>]*?>.*?</frame>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<script[^>]*?>.*?</script>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<frameset[^>]*?>.*?</frameset>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<html[^>]*?>.*?</html>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<iframe[^>]*?>.*?</iframe>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<style[^>]*?>.*?</style>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<layer[^>]*?>.*?</layer>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<link[^>]*?>.*?</link>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<ilayer[^>]*?>.*?</ilayer>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<meta[^>]*?>.*?</meta>", "",
RegexOptions.IgnoreCase); str
= Regex.Replace(str, @"<object[^>]*?>.*?</object>", "",
RegexOptions.IgnoreCase); return str;} |
