Hi all,

I trying to do UK postcode validation.

From a previous post by 'Toppers' I've got the code below. It looks
good however it fails if a postcode of, for example, xxxx 4at.

Does anyone have a better solution?

Thanks,

Ed


Sub MyTest()
ValidatePostCode "WX2 1BA"
End Sub


Sub ValidatePostCode(Byval PostCode as String)
'
' Validate UK Post Code
'
Dim v As Variant
Dim Outer As String, Inner As String
Dim invalid As Boolean


v = Split(PostCode, " ")
If UBound(v) = 0 Then
MsgBox "Post code " & PostCode & " does not contain a blank"
Exit Sub
End If


Outer = UCase(Trim(v(0)))
Inner = UCase(Trim(v(1)))
'
' Validate inner code .....
'
invalid = False
If Len(Inner) < 3 Then
invalid = True
Else
If Left(Inner, 1) Like "[0-9]" Then
If Mid(Inner, 2, 1) Like "[A-Z]" And Mid(Inner, 3, 1) Like "[A-
Z]" Then
Else
invalid = True
End If
Else
invalid = True
End If
End If
If invalid Then
MsgBox "Inner code " & Inner & " is invalid"
Exit Sub
End If
'
' Validate Outer code .....
'
invalid = False
Select Case Len(Outer)


Case Is = 2
If Left(Outer, 1) Like "[A-Z]" And Right(Outer, 1) Like "[0-9]"
Then
Else
invalid = True
End If
Case Is = 3
If Left(Outer, 1) Like "[A-Z]" And Right(Outer, 1) Like "[0-9]" _
And (Mid(Outer, 2, 1) Like "[A-Z]" Or Mid(Outer, 2, 1) Like
"[0-9]") Then
Else
invalid = True
End If
Case Is = 4
If Left(Outer, 1) Like "[A-Z]" And Right(Outer, 1) Like "[A-Z]" _
And (Mid(Outer, 2, 1) Like "[A-Z]" Or Mid(Outer, 2, 1) Like
"[0-9]") _
And (Mid(Outer, 3, 1) Like "[A-Z]" Or Mid(Outer, 3, 1) Like
"[0-9]") Then
Else
invalid = True
End If
Case Else
invalid = True
End Select


If invalid Then
MsgBox "Outer code " & Outer & " is invalid"
Exit Sub
End If


MsgBox "Post Code " & PostCode & " is valid"