ASP.NET过滤HTML字符串方法总结

2024-04-09 15:24:03 549

///<summary>去除HTML标记 /// ///</summary> ///<paramname="Htmlstring">包括HTML的源码</param> ///<returns>已经去除后的文字</returns> publicstaticstringGetNoHTMLString(stringHtmlstring) { //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(); returnHtmlstring; } ///<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> ///<paramname="str">未处理的字符串</param> ///<returns></returns> publicstaticstringGetSafeHTMLString(stringstr) { 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); returnstr; }

ASP.NET过滤HTML字符串方法总结

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