string 如何获得两个其他字符之间的字符？
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How can I get the characters between 2 other characters?
提问by LiamGu
I have a string which at some point contains the set of characters in the following format [123].
我有一个字符串，它在某些时候包含以下格式的字符集[123]。
What I would like to do is get the characters between []but the characters in between are never the same length.
我想要做的是获取之间的字符，[]但两者之间的字符长度永远不会相同。
How would I go about this in VB.NET?
我将如何在 VB.NET 中解决这个问题？
回答by LukeH
Dim s As String = "foo [123]=ro bar"
Dim i As Integer = s.IndexOf("[")
Dim f As String = s.Substring(i + 1, s.IndexOf("]", i + 1) - i - 1)
回答by Davide
Dim s As String = "nav[1]=root"
dim result as String = s.Substring(s.IndexOf("[") + 1, s.IndexOf("]", s.IndexOf("[")) - s.IndexOf("[") - 1)
回答by the_lotus
You could use regular expression.
您可以使用正则表达式。
Dim s, result As String
Dim r As RegularExpressions.Regex
s = "aaa[bbbb]ccc"
r = New RegularExpressions.Regex("\[([^\]]*)\]")
If r.IsMatch(s) Then
result = r.Match(s).Value
Else
result = ""
End If
回答by JemoGlemo
the statement RegularExpressions.Regex("\[([^\]]*)\]")will returns the value inside bracket Andthe bracket its self!
该语句 RegularExpressions.Regex("\[([^\]]*)\]")将返回括号内的值和括号本身！
I have used this statement to return the IPAddress surrounded by () inside long string:-
我已经使用这个语句返回长字符串中由 () 包围的 IPAddress:-
Dim IPRegEx As Regex = New Regex("(?<=\().*?(?=\))")
回答by Mohib Sheth
You could do something like this..
你可以做这样的事情..
Dim val As String = str.Substring(1, str.Length - 2) // replace str with your string variable
