How to get the Display Name Attribute of an Enum member via MVC razor code?

Question

I\'ve got a property in my model called \"Promotion\" that its type is a flag enum called \"UserPromotion\". Members of my enum have display attributes set as follows:

Answer 1

Building on Todd's great answer which built on Aydin's great answer, here's a generic extension method that doesn't require any type parameters.

/// 

/// Gets human-readable version of enum.
/// 
/// DisplayAttribute.Name property of given enum.
public static string GetDisplayName(this T enumValue) where T : IComparable, IFormattable, IConvertible
{
    if (!typeof(T).IsEnum)
        throw new ArgumentException("Argument must be of type Enum");

    DisplayAttribute displayAttribute = enumValue.GetType()
                                                 .GetMember(enumValue.ToString())
                                                 .First()
                                                 .GetCustomAttribute();

    string displayName = displayAttribute?.GetName();

    return displayName ?? enumValue.ToString();
}

I needed this for my project because something like the below code, where not every member of the enum has a DisplayAttribute, does not work with Todd's solution:

public class MyClass
{
    public enum MyEnum 
    {
        [Display(Name="ONE")]
        One,
        // No DisplayAttribute
        Two
    }
    public void UseMyEnum()
    {
        MyEnum foo = MyEnum.One;
        MyEnum bar = MyEnum.Two;
        Console.WriteLine(foo.GetDisplayName());
        Console.WriteLine(bar.GetDisplayName());
    }
}
// Output:
//
// ONE
// Two

If this is a complicated solution to a simple problem, please let me know, but this was the fix I used.