How to create a map from model to Entity, and Entity to model, with AutoMapper?

Question

I have a model

class Account 
{
    public string Name { get; set; }
    public string EmailAddress1 { get; set; }
}

Is it possible to configure AutoMapper to somehow loop through each property on my class and map it to the correct Entity value.

I am able to make a converter with reflection myself:

public Entity ConvertToEntity()
{
    var propertyDict = typeof(Account).GetProperties()
      .Select(x => new KeyValuePair<string, object>(x.Name, x.GetValue(typeof(Account))));
    var entity = new Entity();

    foreach (var prop in propertyDict) t[prop.Key] = prop.Value;

    return entity;
 }

But how can i achieve the same kind of functionality with AutoMapper's CreateMap?

Have a look here: http://www.i-avington.com/Posts/Post/building-a-blog-redux-mapping-view-models-to-entities-using-automapper-part — BBauer42, Apr 14 '15 at 20:48
Standard CRM Entity class https://msdn.microsoft.com/en-us/library/microsoft.xrm.sdk.entity.aspx — Dan Rino Lauritzen, Apr 15 '15 at 09:59

score 1 · Accepted Answer · answered Oct 03 '18 at 09:05

1

Suppose you create marker interface like

// marker interface
public interface ICrmBusinessObject { }

public class MyAccount : ICrmBusinessObject
{
  public string EmailAddress1 { get; set; }
}

Then you can define custom mapper function to convert those:

Mapper.Initialize(cfg => {
  cfg.CreateMap<ICrmBusinessObject, Entity>()
    .AfterMap((crmEntity, entity) =>
    {
      var type = crmEntity.GetType();
      var propertyDict = type.GetProperties()
        .Select(x => new KeyValuePair<string, object>(x.Name.ToLowerInvariant(),
          x.GetValue(crmEntity)));

      foreach (var prop in propertyDict)
      {
        entity[prop.Key] = prop.Value;
      }
    });
});

And you can use mapper like:

var myEntity = new MyAccount { EmailAddress1 = "me@contosco.com" };
var convertedEntity = Mapper.Map<Entity>(myEntity);
// me@contosco.com
Console.Out.WriteLine(convertedEntity["emailaddress1"]);

answered Oct 03 '18 at 09:05

Ondrej Svejdar

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http://docs.automapper.org/en/latest/Dynamic-and-ExpandoObject-Mapping.html – Lucian Bargaoanu Oct 03 '18 at 09:12
@LucianBargaoanu - that link is not relevant; CRM Entity class has Attributes property that is essentially Dictionary to which we want to serialize all properties of the business object; I fail to see how that would be possible without explicit configuration. – Ondrej Svejdar Oct 03 '18 at 09:16
Maybe you should read that more carefully. And if the wording could be better, a PR is welcome. – Lucian Bargaoanu Oct 03 '18 at 09:26
@LucianBargaoanu - CRM entity Attributes property is not Dictionary, Entity is not dynamic object; checkout https://learn.microsoft.com/en-us/previous-versions/dynamicscrm-2016/developers-guide/gg326811%28v%3dcrm.8%29 this is simply not possible in vanilla mapper - you have to define custom rule – Ondrej Svejdar Oct 03 '18 at 09:48
Nobody said that. But clearly no reflection is necessary. AM can get the properties for you. It's easy to map that to the final object. – Lucian Bargaoanu Oct 03 '18 at 10:43

How to create a map from model to Entity, and Entity to model, with AutoMapper?

1 Answers1