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In the example below, Validation attributes, along with many other data annotations, are found in the System. Data Annotations namespace, which is available in both the . The Data Annotations namespace provides two ways of validating a telephone numbers as a data type, .Use the enumeration method when your phone number field is a simple type and use the derived class when the field is an object type.A read-through of the code reveals a number of potential concerns for robust phone number validation: determines if a submitted number is "phone number-ish" That's ok, because there is readily available code that performs much more extensive phone number validation.Google makes extensive use of phone numbers in its cloud applications, business operations, and in the Android, Chrome, and (presumably) Fuchsia operating systems.Fortunately, Tom Clegg has created a port of libphonenumber to C#, libphonenumber-csharp, so .NET developers can implement libphonenumber conveniently in their applications.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.
Although both approaches will work identically in the vast majority of cases, the derived class format does make your code more complex behind the scenes and provide a path for introducing bugs, so it’s better to use enumeration format unless your requirements call for the derived class.Now that you know, you have many reasons for including libphonenumber-csharp in your projects.Also be sure to check out the FAQ and the libphonenumber Readme.This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, Math ML, etc.If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, Mobile OK content, or to find broken links, there are other validators and tools available.
As an alternative you can also try our non-DTD-based validator.