I'm trying to use Automapper to map from a regular enum to an Enumeration Class (as described by Jimmy Bogard - http://lostechies.com/jimmybogard/2008/08/12/enumeration-classes/). The regular enum doesn't have the same values as the enumeration class does. I would therefore like to map using the Name if possible:
Enum:
public enum ProductType { ProductType1, ProductType2 }
Enumeration Class:
public class ProductType : Enumeration { public static ProductType ProductType1 = new ProductType(8, "Product Type 1"); public static ProductType ProductType2 = new ProductType(72, "Product Type 2"); public ProductType(int value, string displayName) : base(value, displayName) { } public ProductType() { } }
Any help to make this mapping work appreciated! I have attempted just a regular mapping:
Mapper.Map<ProductType, Domain.ProductType>();
.. but the mapped type has a value of 0.
Thanks, Alex
Here is how Automapper works - it gets public instance properties/fields of destination type, and matches the with public instance properties/fields of source type. Your enum does not have public properties. Enumeration class has two - Value and DisplayName. There is nothing to map for Automapper. Best thing you can use is simple mapper function (I like to use extension methods for that):
public static Domain.ProductType ToDomainProductType( this ProductType productType) { switch (productType) { case ProductType.ProductType1: return Domain.ProductType.ProductType1; case ProductType.ProductType2: return Domain.ProductType.ProductType2; default: throw new ArgumentException(); } }
Usage:
ProductType productType = ProductType.ProductType1; var result = productType.ToDomainProductType();
If you really want to use Automapper in this case, you ca provide this creation method to ConstructUsing method of mapping expression:
Mapper.CreateMap<ProductType, Domain.ProductType>() .ConstructUsing(Extensions.ToDomainProductType);
You also can move this creation method to Domain.ProductType class. Then creating its instance from given enum value will look like:
var result = Domain.ProductType.Create(productType);
UPDATE: You can use reflection to create generic method which maps between enums and appropriate enumeration class:
public static TEnumeration ToEnumeration<TEnum, TEnumeration>(this TEnum value) { string name = Enum.GetName(typeof(TEnum), value); var field = typeof(TEnumeration).GetField(name); return (TEnumeration)field.GetValue(null); }
Usage:
var result = productType.ToEnumeration<ProductType, Domain.ProductType>();
