Check if Model is valid outside of Controller

Question

I have a helper class that is passed an array of values that is then passed to a new class from my Model. How do I verify that all the values given to this class are valid? In other words, how do I use the functionality of ModelState within a non-controller class.

From the controller:

public ActionResult PassData() {     Customer customer = new Customer();     string[] data = Monkey.RetrieveData();     bool isvalid = ModelHelper.CreateCustomer(data, out customer); } 

From the helper:

public bool CreateCustomer(string[] data) {     Customter outCustomer = new Customer();     //put the data in the outCustomer var     //??? Check that it's valid  } 

Answer 1

You could use the data annotations validation outside of an ASP.NET context:

public bool CreateCustomer(string[] data, out Customer customer) {     customer = new Customer();     // put the data in the customer var      var context = new ValidationContext(customer, serviceProvider: null, items: null);     var results = new List<ValidationResult>();      return Validator.TryValidateObject(customer, context, results, true); }