C＃普通快递如何让这场比赛

Question

请帮我解决这个问题，非常感谢

string= 
" 
<span id="thread_aaaa" class="tsubject"> 
    <a href="viewthread.php?tid=12343245&amp;extra=page%3D1"> 
     WHAT I WANT TO GET1 
    </a> 
</span> 

<span id="thread_bbbb" class="tsubject"> 
    <a href="viewthread.php?tid=65456342&amp;extra=page%3D1"> 
     WHAT I WANT TO GET2 
    </a> 
</span> 
" 

我需要得到的是我想做的GET1的价值，我想GET2等

我使用： (" < span id=\"thread_)(.+?)< /a>< /span>")，但不工作，帮助

Answer 1

你正在寻找的正则表达式是：

(?<=aaa)(.*)(?=bbb) 

//匹配的两个字符串AAA和BBB

Answer 2

对于给定的新的示例串之间的任何字符，这会找到他们：

string str = @" 
< span id=""thread_aaaa"" class=""tsubject"" >< a href=""viewthread.php?tid=12343245&extra=page%3D1"" > WHAT I WANT TO GET1 </a></span> 

< span id=""thread_bbbb"" class=""tsubject"">< a href=""viewthread.php?tid=65456342&extra=page%3D1"" >WHAT I WANT TO GET2</a>< /span>"; 

Regex regex1 = new Regex(@"href.*>(.*)< *\/a"); 
var matches = regex1.Matches(str); 

foreach (var m in matches) 
{ 
    var match = (Match) m; 
    Console.WriteLine(match.Groups[1].Value.Trim()); // write the value to the console "pattern" 
} 

/* 
Output: 
WHAT I WANT TO GET1 
WHAT I WANT TO GET2 
*/