Help with checking string format? (Windows App VS 2010, with VB.NET)

Hi,

I need to make sure my string s is in the following format: xxxx-xx-xxx-xxxx

How do check to make sure s is in the desired format, if not return an error message?

Or if length is 13 characters , s = 1305000200923, convert the string to 1305-00-020-0923

Thanks,

Victor
vcharlesAsked:
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käµfm³d 👽Commented:
How about?

If System.Text.RegularExpressions.Regex.IsMatch(theString, "^\d{13}$") 
    theString = theString.Insert(9, "-").Insert(6, "-").Insert(4, "-")
ElseIf Not System.Text.RegularExpressions.Regex.IsMatch(theString, "^\d{4}-\d{2}-\d{3}-\d{4}$") Then
    ' string does not match; return error
End If

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vcharlesAuthor Commented:
Thank You!
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