How to validate postcode ( british) ?

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I am trying to validate British postcodes for my project and the problem is that there are several valid formats in the UK (A1 1AA / AA1 1AA / AA11 1AA) and many more.
Basically I need to be able to save customer details including their postcode therefore I need to be able to validate it. I have tried using the code below but it's not working.

What I have tried:

   Private Sub btnSubmit_Click(sender As Object, e As EventArgs) Handles btnSubmit.Click

Dim regPost As New System.Text.RegularExpressions.Regex("^[A-Za-z]{1,2}[0-9A-Za-z]{1,2}[ ]?[0-9]{0,1}[A-Za-z]{2}$")
       Dim strTest As String = "SW11 2LE"
       Dim strWrong As String = "11710"
       Debug.Print(strTest & " - " & regPost.IsMatch(strTest))
       Debug.Print(strWrong & " - " & regPost.IsMatch(strWrong))

Posted 23-Dec-17 2:02am

faiqaa

Updated 23-Dec-17 2:15am

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F-ES Sitecore 23-Dec-17 11:06am

My advice is not to bother. Postcodes change and if you end up refusing to validate a postcode that is valid it just annoys your users.

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OriginalGriff · Answer 1 · 2017-12-23T02:15:00

If in doubt, google: validate postcode ( british) - Google Search[^]
This links to Wikipedia: Postcodes in the United Kingdom - Wikipedia[^] which includes the UK Government validation Regex ...

In future, please try to do at least basic research yourself, and not waste your time or ours - particularly since you seem to be having the same problem repeatedly: Email and postcode?