Regex format problem

[DotNetBlocks]

Hello, I have a string that i want to fit a specific format, but when i try and apply it i get an error.
What am i doing wrong?

dim chekme as string  ="999999999999"
  chekme = Format(chekme, "^\d{5}-\d{2}-\d{3}-\d{2}$")
  ' It should look like this "99999-99-999-99"

I get the following error:

Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

 

[onpnt]

your parameters are switched first. Error indicates you are not matching your arguments though. Mainly {0} which is the first.

Take a look at .NET Format String 101

I wouldn't give you a link and attempt to explain the Format method more but to be honest I have not dove into it that much so I may mislead you. It does seem like you want to do a RegEx.Replace though and not a String.Format.

Although in your case and after you read that article and possibly MS references you would I believe come up with something like this. Looks horribly inefficient though to me

Dim chekme As String = "123456789123"
Dim newStr As String = String.Format("{0}-{1}-{2}-{3}", _
chekme.Substring(0, 4), _
chekme.Substring(5, 2), _
chekme.Substring(7, 3), _
chekme.Substring(10, 2))

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[Drederick]

Imports System.Text.RegularExpressions

Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim chekme As String = "999999999999"
Dim re As New Regex("(\d{5})(\d{2})(\d{3})(\d{2})")

chekme = re.Replace(chekme, "$1-$2-$3-$4")
Debug.Print(chekme)
End Sub
End Class

 

[onpnt]

I was hoping there would be some kind of learning experience in saying that would be the way to go ;-)


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[DotNetBlocks]

Thanks onpnt and Drederick for your help.

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