Get string between 2 strings

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VS2012

I want go get string between two strings. I will use for url

For example

VB

dim main as string = "kgjhnbkfm glnvfkdşlv http://ghkng.xfg/ngbf.png gvlkdjg"
dim before as string="http://"
dim after as string = ".png"
dim useless as string='I need to get between theese strings (before and after)
dim urlfinal as string=before+useless+after

Posted 3-May-13 8:01am

xboost

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3 solutions

Solution 1

You could use rexex for this:
Expresso - A Tool for Building and Testing Regular Expressions[^]
MAtch the part that is preseded by and followed by.

Posted 3-May-13 8:26am

Kenneth Haugland

Solution 3

I would suggest you look at regular expressions[^].

A quick C# solution (maybe not the best as my RegExp is not as good as it should be):

C#

string main = "kgjhnbkfm glnvfkdşlv http://ghkng.xfg/ngbf.png gvlkdjg";
Regex pattern = new Regex("(.*)http://(?<urlfinal>(.*)).png(.*)");

Match match = pattern.Match(main);

string urlFinal = "http://" + match.Groups["urlfinal"].Value + ".png";
</urlfinal>

It should be easily convertible to VB.NET.

Posted 3-May-13 8:33am

jsolutions_uk

Updated 3-May-13 8:43am

v2

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OriginalGriff · Accepted Answer · 2013-05-03T08:27:00

Use a Regex:

VB

Dim regex As Regex = New Regex( _
      "(?<=http://).*?(?=\.png)", _
    RegexOptions.Multiline _
    Or RegexOptions.CultureInvariant _
    Or RegexOptions.IgnorePatternWhitespace _
    Or RegexOptions.Compiled _
    )
Dim InputText As String = "kgjhnbkfm glnvfkdşlv http://ghkng.xfg/ngbf.png gvlkdjg"
Dim m As Match = regex.Match(InputText)
If (m.Success) Then
    Console.WriteLine(m.Value)
End If