老调重弹，求一正则！

[beckfun]

						<ul class="vv41Table">
         	            <li class='vv4TableDIV1' >
						<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
         	            <li class='vv4TableDIV1' >
						<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
         	            <li class='vv4TableDIV1' >
						<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
         	            <li class='vv4TableDIV1' >
						<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
						</ul>

页面里有这么一个列表，匹配列表里面的a标签！ul外面也会有a标签，但是不匹配，只匹配<ul class="vv41Table">下的a标签

[阿非]

<ul class="vv41Table">
<li class='vv4TableDIV1' >
<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
<li class='vv4TableDIV1' >
<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
<li class='vv4TableDIV1' >
<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
<li class='vv4TableDIV1' >
<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
</ul>
<ul class="vv41Table1">
<li class='vv4TableDIV1' >
<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
<li class='vv4TableDIV1' >
<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
<li class='vv4TableDIV1' >
<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
<li class='vv4TableDIV1' >
<span class="vv41A"><a href="../ddddd/sss" target="_blank">********</a></span></li>
</ul>
------------------------------------
这样结果不正确

[dalmeeme]

嗯，可以这样：

		string s = File.ReadAllText(Server.MapPath("~/test.txt"));
		MatchCollection uls = Regex.Matches(s, @"(?is)<ul[^>]+class=""vv41Table""[^>]*>.*?</ul>");
		List<string> results = new List<string>();
		foreach (Match ul in uls)
		{
			MatchCollection anchors = Regex.Matches(ul.Value, @"(?is)<a[^>]+>.*?</a>");
			foreach (Match anchor in anchors)
				results.Add(anchor.Value);
		}
		foreach (string result in results)
			Response.Write(Server.HtmlEncode(result) + "<br/>");

[dalmeeme]

也可以用Dom方式获取，要简单得多：

		HtmlDocument htmlDoc = new HtmlDocument();
		htmlDoc.Load(Server.MapPath("~/test.txt"));
		HtmlNodeCollection anchors=htmlDoc.DocumentNode.SelectNodes(@"//ul[@class='vv41Table']//a");
		foreach (HtmlNode anchor in anchors)
			Response.Write(Server.HtmlEncode(anchor.OuterHtml) + "<br/>");

[yzf86211861]

高手啊 学习

[风一样的大叔]

我也是来学习的

[huangwenquan123]

            string str = File.ReadAllText(@"E:\1.txt");
            Regex reg = new Regex(@"(?is)(?<=<ul[^>]+?class=""vv41Table""[^>]*?>(?:(?!</?ul).)*)<a[^>]+>.*?</a>");
            foreach (Match m in reg.Matches(str))
                Console.WriteLine(m.Value);

[q107770540]

void Main()
{
					  string str = @"<ul class=""vv41Table"">
  <li class='vv4TableDIV1' >
  <span class=""vv41A""><a href=""../ddddd/sss"" target=""_blank"">********</a></span></li>
  <li class='vv4TableDIV1' >
  <span class=""vv41A""><a href=""../ddddd/sss"" target=""_blank"">********</a></span></li>
  <li class='vv4TableDIV1' >
  <span class=""vv41A""><a href=""../ddddd/sss"" target=""_blank"">********</a></span></li>
  <li class='vv4TableDIV1' >
  <span class=""vv41A""><a href=""../ddddd/sss"" target=""_blank"">********</a></span></li>
  </ul>
 <ul class=""vv41Table1"">
  <li class='vv4TableDIV1' >
  <span class=""vv41A""><a href=""../ddddd/sss"" target=""_blank"">********</a></span></li>
  <li class='vv4TableDIV1' >
  <span class=""vv41A""><a href=""../ddddd/sss"" target=""_blank"">********</a></span></li>
  <li class='vv4TableDIV1' >
  <span class=""vv41A""><a href=""../ddddd/sss"" target=""_blank"">********</a></span></li>
  <li class='vv4TableDIV1' >
  <span class=""vv41A""><a href=""../ddddd/sss"" target=""_blank"">********</a></span></li>
  </ul>
";

	  foreach(Match m in Regex.Matches(str,@"(?is)<ul class=(['""\s]?)vv41Table\1>.*?((<a[^>]*?>[^<>]+</a>).*?)+</ul>"))
	  {
	     foreach(Capture c in m.Groups[3].Captures)
		 {
		    Console.WriteLine(c.Value);
		 }
	  }
	  
	  /*
	<a href="../ddddd/sss" target="_blank">********</a>
	<a href="../ddddd/sss" target="_blank">********</a>
	<a href="../ddddd/sss" target="_blank">********</a>
	<a href="../ddddd/sss" target="_blank">********</a>
	  */
}

[人称猪]

我也是学习来的
没看懂~~

[dalmeeme]

		string s = File.ReadAllText(Server.MapPath("~/test.txt"));
		MatchCollection matches=Regex.Matches(s, @"(?is)(?<=<ul[^>]+class=""vv41Table""[^>]*>.*?)<a[^>]+>.*?</a>(?=.*?</ul>)");
		foreach (Match match in matches)
			Response.Write(Server.HtmlEncode(match.Value) + "<br/>");

[beckfun]

NND我蛋疼了！结贴！再新开一贴继续问!

[大渣吼吾系渣渣辉]