Regular expression validating phone number
Regular expressions are a good way to validate text fields such as names, addresses, phone numbers, and other user information. A regular expression can easily check whether a user entered something that looks like a valid phone number.
You can use them to constrain input, apply formatting rules, and check lengths. By using capturing groups to remember each set of digits, the same regular expression can be used to replace the subject text with precisely the format you want.
‘^ is used to mask the start of regular expression and $ is used to mark the end.
‘$’ is used to stop matching too much string into final result than required.
The supported formats are 1234567890, 123-456-7890, 123.456.7890, 1, (123) 456 7890, and all related combinations.
If the phone number is valid, we will convert that our standard format, (123) 456-7890, so that the phone number records are consistently recorded.
To build your regular expression see help and examples.
Below is an example of how to restrict text entry to exactly five lowercase letters (e.g.
Regular expressions can also be used to validate that the input conforms to a given format.Using this package I created a utility class to validate some commonly used data elements. Regular Expressions Public Class Form1 Private Sub Button1_Click(By Val sender As System. Text = "Not Valid phone number" End If End Sub Variables in Visual Basic . NETRead and write Excel 2000 - 2003 file - Visual Basic . NETWhat is Visual Basic - A Detailed Analysis on Visual Basic Update Records in Access (2007) Table - Visual Basic . NETLogin Tutorial Using Access Database - Visual Basic . NET to My Sql Database Read (Lookup) records from Access Database - Visual Basic . NETRead (Lookup) records from Access Database - Visual Basic . NETVisual Basic Tutorials Simple Login Tutorial - Visual Basic . NET Placing Controls on Form Hangman Tutorial - Page 1 - Visual Basic .
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