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VB.net substring help

Posted on 2012-03-20
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Last Modified: 2012-03-20
I'm trying to extract text..

If the first 12 characters are 5 numbers followed by a comma followed by 5 numbers followed by a comma, I want to assign everything following the second comma to a vaiable

i.e.
00582,00087,blahblah

myString would = blahblah

TIA
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Question by:Mike Miller
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8 Comments
 
LVL 41

Expert Comment

by:Kyle Abrahams
ID: 37743839
dim OrigString as string = "00582,00087,blahblah"
dim myString as String

myString =  OrigString.Split(",").Last
0
 

Author Comment

by:Mike Miller
ID: 37743848
Probably would work for me but what if the string is...


impor,tant,info,41341231

???
0
 
LVL 38

Expert Comment

by:PaulHews
ID: 37743854
Assuming that the string format is fixed:
Dim myString As String = teststring.Substring(12)

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Otherwise you could use code similar to what I answered in the last question about getting the content to the right of a particular character.
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Author Comment

by:Mike Miller
ID: 37743862
It would only be fixed if there is the format of 5number comma 5 number comma

Could be

blah,blah,blah

in which case I would not want to change the string
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LVL 38

Accepted Solution

by:
PaulHews earned 2000 total points
ID: 37743885
Instead you might want to use a regular expression:

 Dim myString As String = System.Text.RegularExpressions.Regex.Replace(teststring, "^\d{5},\d{5},", "")

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0
 
LVL 83

Expert Comment

by:CodeCruiser
ID: 37743888
Try

Dim idx As Integer = str.indexof(",")
if idx = 5 Then
   if str.Indexof(",", idx)=11 Then
      'further checks here and substring
   End If
End If
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 37743893
Regex is probably overkill for this, but you could do:

Dim myString As String
Dim m As System.Text.RegularExpressions.Match = System.Text.RegularExpressions.Regex.Match(input, "^\d{5},\d{5},(.*)")

If m.Success Then
    myString = m.Groups(1).Value
Else
    myString = String.Empty
End If

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0
 
LVL 41

Expert Comment

by:Kyle Abrahams
ID: 37743917
from:

dim OrigString as string = "00582,00087,blahblah"
dim myString as String = SubString(NthIndexOf(OrigString, "," , 2))




Public NotInheritable Class StringExtender
	Private Sub New()
	End Sub
	<System.Runtime.CompilerServices.Extension> _
	Public Shared Function NthIndexOf(target As String, value As String, n As Integer) As Integer
		Dim m As Match = Regex.Match(target, "((" & value & ").*?){" & n & "}")
		If m.Success Then
			Return m.Groups(2).Captures(n - 1).Index
		Else
			Return -1
		End If
	End Function
End Class

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