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Need a regular expression or similar to verify entered mobilenumbers in VB.NET!

Posted on 2006-11-09
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Last Modified: 2008-02-01
Hello,

I need to write a regular expression or something similar that checks wether an entered mobile number is correct. Code is vb.net!
The numbers are all entered in one and the same textbox wich after clicking the submit button is verified by code and returns a boolean wether the number is correct or not.

The mobile number may also not contain letters and may not be empty and may not hold more than 17 characters including spaces.

Here are some examples of mobile numbers which are accepted and valid:

0031 6 12345678              (dutch mobile numbers)
0032 473 123456               (belgian mobile numbers)
0049 175 1234567             (German mobile numbers)

So basically for the dutch number that would be:
00<landcode><space><netnumber without 0><space><number>
00<31> <6> <12345678>                

belgian number :
00<landcode><space><netnumber without 0><space><number>
00<32> <473> <123456>

german number :
00<landcode><space><netnumber without 0><space><number>
00<49> <175> <1234567>

It doesnt have to be a regular expression but it would be great if it were. So long as the code works and does what it is supposed to do then thats alright with me.

Therefore I'm gonna give this question 400 points. Happy code solving fella's and dudettes.

Kind regards,
Gizeh




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Question by:Gizeh2000
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Accepted Solution

by:
riyazthad earned 400 total points
Comment Utility
Gizeh,

You can do it using reg expression. ou can check return value whether true or false.

For  dutch number :
        regex.Match(txtBox.Text,"^00\d{2}\x20[1-9]\x20\d{8}$").Success  
For  belgian number
        regex.Match(txtBox.Text,"^00\d{2}\x20[1-9]{3}\x20\d{6}$").Success  
For  german
        Regex.MatchtxtBox.Text, "^00\d{2}\x20[1-9]{3}\x20\d{7}$").Success

This will return TRUE if it is valid phone number.

I hope this will work out.

Thad
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Expert Comment

by:Fernando Soto
Comment Utility
Hi Gizeh2000;

This should do what you need.

Imports System.Text.RegularExpressions

        ' Sample Data
        Dim input As String = "0032 473 123456"

        If Regex.Match(input, "^00\d\d\s[1-9]\d*\s[1-9]\d+$").Value.Length <= 17 Then
            MessageBox.Show("Cell number is valid")
        Else
            MessageBox.Show("Cell number is NOT valid")
        End If


Fernando
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Author Comment

by:Gizeh2000
Comment Utility
Hi Thad,

Works like a charm! Thanks for taking the time to write down these reg expressions. And sorry Fernando, Thad was first so, first come first served.

Kind regards,
Gizeh
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Expert Comment

by:riyazthad
Comment Utility
Thanks Gizeh

Thad
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