正则 截取固定开头结尾字符串中间的字符串
比如：class="g">topic.csdn.net/u/20091018/11/ef331a56-93f ... 2011-3-28 </span> - <a
其中以class="g">开头 ；</span> - <a结尾如何获取中间的字符串：topic.csdn.net/u/20091018/11/ef331a56-93f ... 2011-3-28 。


[解决办法]

C# code

        string str = "class="g">topic.csdn.net/u/20091018/11/ef331a56-93f ... 2011-3-28 </span> - <a";        Regex reg = new Regex(@"(?s)(?<=class="g">).*(?=</span> - <a)");        foreach (Match m in reg.Matches(str))        {            Response.Write(m.Value + "<br/><br/><br/><br/>");        }//topic.csdn.net/u/20091018/11/ef331a56-93f ... 2011-3-28
[解决办法]
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C# code

        string str = "class="g">topic.csdn.net/u/20091018/11/ef331a56-93f ... 2011-3-28 </span> - <a";
        Regex reg = new Regex(@"(?s)(?<……