Validating a phone number
It's available as a Nu Get package, which makes it easy to add to any project. NET project and hammering away, it's a good idea to review some of the documentation.
To get an idea of the kinds of idiosyncrasies and uncertainties associated with phone numbers, read some of the libphonenumber documentation, starting with: Falsehoods Programmers Believe About Phone Numbers You'll probably be shocked at the amount of phone number complexity you've been blissfully unaware of before.
Both these formats are documented as performing validation with a regular expression, but the documentation itself is silent on the regular expression(s) used.
A better understanding of how this class works can be had by examining the source code on Git Hub.
Lookup gives you the tools you need to do just that.
Application development frameworks, including the . Fortunately, there is a open source library, in your .If those checks pass we can use the You can use this pattern to perform a wide variety of checks and transformations on phone numbers, including formatting a number for international dialing from with mobile phones and landlines from various countries.If you want to try additional checks using the class in the Controller you can write them to output or add more fields to the view model and the view.The view model contains fields for the phone number's issuing country and the phone number to check. The Blip Phone sample project contains code to populate a dropdown field with a list of countries and return a two-character ISO country code in the viewmodel.You can use the code provided for the sample, or use the The controller action method accepts the view model returned from the HTML form by the MVC middleware and validates the antiforgery token and the model state of the view model.