正则表达式

[wangj2001]

<TD class=msc><A class=t
href="http://www.xbom.com/iibs/ZH/buildcoupon.asp?couponchoice=F501154">xxyoup 搜索大全</A></TD>
其中msc,搜索大全是关键字(肯定存在)，我想用正则表达式获取一个网页中的url,比如http://www.xbom.com/iibs/ZH/buildcoupon.asp?couponchoice=F501154

[saucer]

try


using System.Text.RegularExpressions;


string s= @"<TD class=msc><A class=t href=""http://www.xbom.com/iibs/ZH/buildcoupon.asp?couponchoice=F501154"">xxyoup 搜索大全</A></TD>";

Regex re = new Regex(@"<a[^>]+href=(?:""(?<url>[^""]+)""|'(?<url>[^']+)')", RegexOptions.IgnoreCase);
Match m = re.Match(s);
if (m.Success)
{

Console.WriteLine("{0} is {1}", s, m.Groups["url"].Value);
}

[wangj2001]

差一步给分 我怎么才能排除掉clss!=msc 和文字不是“搜索大全”

[liduke]

先将想留的分成组，然后把不等组的替换

[saucer]

there is no general way to do that, normally, you would use

(?!.*msc).*

(?!.*搜索大全).*

in your case, it is properly easier to get the TD class and the text in the hyperlink, then check if they contain those words

[wangj2001]

能写个完整的例子 saucer(思归/MVP)