一个正则表达式

Question

<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=2">[2]</a>&nbsp;<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=3">[3]</a>&nbsp;<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=4">[4]</a>&nbsp;<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=5">[5]</a>&nbsp;<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=6">[6]</a>&nbsp;<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=7">[7]</a>&nbsp;<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=8">[8]</a>&nbsp;<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=9">[9]</a>&nbsp;<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=10">[10]</a>&nbsp;<a href="http://www.qihoo.com/wenda.php?kw=%C2%D6%CC%A5&ff=1&do=search&noq=q&src=nindex&page=2">下一页</a></div>正则匹配出  下一页的 Url  既 最靠近 下一页的  http://

Answer 1

从后面匹配即可，来我给你匹配Regex regex = new Regex("<a\\s+href=\"(.*?)\">下一页</a>", RegexOptions.RightToLeft);
Match match = regex.Match(你上面的那句话);
if(match.Success)
{
  String url = match.Group[1].ToString();
}