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Use Regular Expressions to Extract Data Fields in VB.NET

Posted on 2009-03-31
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Last Modified: 2013-11-07
Dear Experts,

I need to use regular expressions to extracted data fields in a string received from a device attached to a serial port. The strings look like the one below:

+IPR: (),(300,600,1200,2400,4800,9600,19200,38400,57600,115200,230400)

The data I want extracted is the one in braces. Using the sample string above, regex should extract the data as follows:

Field1= "" ' i.e. empty screen because there is no data in the first set of braces ()
Field2 = "300,600,1200,2400,4800,9600,19200,38400,57600,115200,230400" ' i.e. data in the second set of braces

There may be more braces with data in the received strings. The returned data can be in a single keyed list e.g.

DataFields(0)=""
DataFields(1)="300,600,1200,2400,4800,9600,19200,38400,57600,115200,230400"
DataFields(3)=...

Any idea how I can best implement this in VB.NET?
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Question by:bmatumbura
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2 Comments
 
LVL 47

Accepted Solution

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Wayne Taylor (webtubbs) earned 2000 total points
ID: 24027741
Try this function, which returns a Generic list of type string.

Wayne
    Public Shared Function GetFields(ByVal fieldString As String) As List(Of String)
 
        Dim patt As String = "\((.*?)\)"
        Dim strList As New List(Of String)
        Dim mtchs As MatchCollection = Regex.Matches(fieldString, patt)
        For Each m As Match In mtchs
            strList.Add(m.Groups(1).Value)
        Next
        Return strList
 
    End Function

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Author Closing Comment

by:bmatumbura
ID: 31564763
Thanks, works perfect!
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