C#正则高手帮忙！！！

Question

<td class=tdn>1 </td> 
<td class=d> <a href="http://202.108.23.172/m?ct=134217728&tn=baidusg,让爱靠近  01 99 cn&word=mp3,http://file.99.cn/15/dalu/nangeshou/200807/rangaikaojin/YWMz.mp3,,[%C8%C3%B0%AE%BF%BF%BD%FC+%C2%DE%D6%D0%D0%F1]&si=%C8%C3%B0%AE%BF%BF%BD%FC;;%C2%DE%D6%D0%D0%F1;;277647;;277647&lm=16777216&sgid=1" title="请点击左键！来源网址：  http://file.99.cn  请参照百度权利声明使用" onclick="return ow(event,this)"  target="_blank"> <font style=color:#e10900>让爱靠近 </font>  01 99 cn </a> </td> 
<td> <a href="http://mp3.baidu.com/singerlist/%C2%DE%D6%D0%D0%F1.html" target="_blank"> <font style=color:#e10900>罗中旭 </font> </a>&nbsp; <a href="http://mp3.baidu.com/singerlist/.html" target="_blank"> </a>&nbsp; <a href="http://mp3.baidu.com/singerlist/.html" target="_blank"> </a>&nbsp; </td> 
<td class=al> <a href="http://mp3.baidu.com/albumlist/%C2%DE%D6%D0%D0%F1;;;;;;%C8%C3%B0%AE%BF%BF%BD%FC.html" target="_blank"> <font style=color:#e10900>让爱靠近 </font> </a>&nbsp; </td> 
<td> <a href="http://box.zhangmen.baidu.com/m?gate=1&ct=134217728&tn=baidumt,让爱靠近  01 99 cn&word=mp3,http://file.99.cn/15/dalu/nangeshou/200807/rangaikaojin/YWMz.mp3,,[%C8%C3%B0%AE%BF%BF%BD%FC+%C2%DE%D6%D0%D0%F1]&si=%C8%C3%B0%AE%BF%BF%BD%FC;;%C2%DE%D6%D0%D0%F1;;277647;;277647&lm=16777216" onclick="return ot(event,this,'277647')">试听 </a>&nbsp; </td> 
<td> <a href="http://mp3.baidu.com/m?tn=baidump3lyric&word=%C2%DE%D6%D0%D0%F1+%C8%C3%B0%AE%BF%BF%BD%FC&ct=150994944&lm=-1&lf=3" target="_blank">歌词 </a>&nbsp; </td> 
<td> &nbsp; </td> 
<td>3.8 M </td> 
<td>mp3 </td> 
<td class=spd> <img src="http://img.baidu.com/img/mp3/d9.gif"> </td> 需求是得到： 
<td> <a href="http://box.zhangmen.baidu.com/m?gate=1&ct=134217728&tn=baidumt,让爱靠近  01 99 cn&word=mp3,http://file.99.cn/15/dalu/nangeshou/200807/rangaikaojin/YWMz.mp3,,[%C8%C3%B0%AE%BF%BF%BD%FC+%C2%DE%D6%D0%D0%F1]&si=%C8%C3%B0%AE%BF%BF%BD%FC;;%C2%DE%D6%D0%D0%F1;;277647;;277647&lm=16777216" onclick="return ot(event,this,'277647')">试听 </a>&nbsp; </td> 
里 <a>标签href的URL。 
希望高手给出正则来。 

Answer 1

(?<=<td> <a href=").*?(?="\so)
Regex re = new Regex(@"(?<=<td> <a href="").*?(?=""\so)", RegexOptions.None);

Answer 2

Regex reg=new Regex("<td> <a href=[^>]+?>试听 </a>[^>]+?</td>");

Answer 3

只要试听的？Match m = Regex.Match(yourStr, @"(?<=href="")[^""]*(?=""[^>]*>\s*试听)", RegexOptions.IgnoreCase);
if (m.Success)
{
    MessageBox.Show(m.Value);
}

Answer 4

如果只要href的值，可以办到
href="(?<value>[^"]*)" 
参考分组