获取两个字符串之间的文本 Regex VB.Net [英] Get text between two strings Regex VB.Net

问题描述

我真的对正则表达式有严重的问题.我需要获取 2 个字符串之间的所有文本，在这种情况下，字符串是 <span class="user user-role-registered-member"> 和 </span>.

I really have serious problems with regex. I need to get all text between 2 strings, in this case that strings are <span class="user user-role-registered-member"> and </span>.

我在谷歌上搜索了很多问题(其中一些在 StackOverFlow 上)，并观看了 YouTube 教程，但仍然无法得到.

I googled pretty much questions (some of them are on StackOverFlow), and watched YouTube tutorials, still can't get it.

这是我认为可行的代码，但我不知道为什么不可行.

This is the code that i think would work, but i don't know why it doesn't.

Dim mystring As String = "<br>Terms of Service<br></br>Developers<br>"

Dim pattern1 As String = "(?<=<br>)(.*?)(?=<br>)"
Dim pattern2 As String = "(?<=</br>)(.*)(?=<br>)"

Dim m1 As MatchCollection = Regex.Matches(mystring, pattern1)
Dim m2 As MatchCollection = Regex.Matches(mystring, pattern2)
MsgBox(m1(0).ToString)
MsgBox(m2(0).ToString)

好的，所以这段代码工作得很好......使用<br>.我试图用 span 更改 pattern1 和 pattern2 的 <br> 但它不起作用.我知道我在这里犯了一个错误，但我不知道在哪里/如何.

Ok, so this code works pretty well....with <br>. I tried to change pattern1 and pattern2's <br> with span but it doesn't work. I know that i am making a mistake here, but i don't know where/how.

任何答案都会非常有帮助.

Any answer will be really helpful.

推荐答案

这可以轻松而精美地完成工作.当跨度内没有文本时，它不会返回匹配项，因此您无需担心空匹配项.然而，它会返回只有空格的组.

This does the job easily and beautifully. It won't return a match when there is no text inside the span, so you do not need to worry about empty matches. It will however return groups with only whitespace in them.

<span class=""user user-role-registered-member"">(.+)</span>

测试一下 此处.

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