Question

I there a way in ASP.Net MVC to have a RegularExpression attribute on a model property to pull the pattern string property from resource file or another class?

When I attempt to use another class I get a message stating that the attribute values must be a constant, typeof expression, or an array.

Ultimately, I’m attempting to abstract some of these patterns so I don’t have to update multiple files if a bug is located in a pattern.

Example:

public class MyModel{
    [RegularExpression(StaticPatternClass.EmailPattern, ErrorMessage="invalid email")]
    public string email { get; set;}
}

public static class StaticPatternClass{
    public static string EmailPattern = @"My pattern here";
}

Answer 1

Try

public const string EmailPattern ….

instead