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C#正则删除HTML标签

2012-05-23 20:16 393 查看

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text.RegularExpressions;

public partial class Ceshi : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
string str = Regex.Replace("AAA\nBBB\nCCC<br>", "^", "开始=>", RegexOptions.Multiline | RegexOptions.IgnoreCase);//多行模式，每行前面加 '开始=>'
Response.Write(str);
string s = @"<html><title>title\\标题</title><head><script>alert('JS脚本');</script>head头部</head><body><table><tr><td>TD的内容1</td><td>TD的内容2</td></table><div style='width:100px;'>DIV的内容</div><span>span内容1</spaN><spAN>span内容2</SPAN></body></html>";
Response.Write(ClearHTMLTags(s));
}
}
public static string ClearHTMLTags(string HTML)
{
string[] Regexs ={
@"<script[^>]*?>.*?</script>",
@"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""'])(%7c[%5e/7])*?\7|\w+)|.{0})|\s)*?(\/\s]\\[""'tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>",
@"([\r\n])[\s]+",
@"&(quot|#34);",
@"&(amp|#38);",
@"&(lt|#60);",
@"&(gt|#62);",
@"&(nbsp|#160);",
@"&(iexcl|#161);",
@"&(cent|#162);",
@"&(pound|#163);",
@"&(copy|#169);",
@"&#(\d+);",
@"-->",
@"<!--.*\n"
};

string[] Replaces ={
"",
"",
"",
"\"",
"&",
"<",
">",
" ",
"\xa1", //chr(161),
"\xa2", //chr(162),
"\xa3", //chr(163),
"\xa9", //chr(169),
"",
"\r\n",
""
};

string s = HTML;
for (int i = 0; i < Regexs.Length; i++)
{
s = new Regex(Regexs[i], RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(s, Replaces[i]);
}
s.Replace("<", "");
s.Replace(">", "");
s.Replace("\r\n", "");
return s;
}
}

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