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Troubleshooting Question

Data Annotations in an interface

Nitesh Patel
Nitesh Patel asked
Last Modified: 2020-11-16
We have an interface:

    public interface IContactName
        int PersonID { get; set; }
        string FirstName { get; set; }
        string LastName { get; set; }
        string MiddleName { get; set; }
        string AlsoKnownAs { get; set; }

We are suppose to validate the FirstName, LastName and MiddleName, to make sure they only contain, numbers, letters, period, hyphen and apostrophe.

The interface gets inherited by several classes.

I was thinking about adding the validation data annotation in the interface, above the properties we are validating.

        [RegularExpression("^[a-zA-Z0-9-`.\s]*$", ErrorMessage = "First Name can only contain Alphanumeric characters, numbers, hyphen and aphostrophe")]

Thinking out loud, since it is the names we are validating, and they should all have a standard format this should work. However, I am not sure about best practices. Therefore wanted to get some opinion. 

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