CODEWITHSUNDEEP
c#asp.net-mvclinqlambdaautomapper
Rob Davis
Rob Davis

Reputation: 13

Complex Object mapping using Automapper

I'm trying to use auto mapper to achieve the below code.

List<VlaListView> vlaVmList = new List<VlaListView>();
var vlaCollectionList = vlaCollection.ToList(); //database populate list

foreach (var vla in vlaCollectionList)
{
    VlaListView vlaVm = new VlaListView();
    vlaVm.VlaId = vla.VlaId;
    vlaVm.UserName = vla.UserName;
    vlaVm.DateOut = vla.DateOut.ToShortDateString();
    vlaVm.ReturnDate = vla.ReturnDate.ToShortDateString();
    vlaVm.Status = vla.Status;

    string regnumbers = string.Empty;

    foreach (var vehicle in vla.Vehicles)
    {
        regnumbers += vehicle.RegistrationNumber + ", ";
    }

    regnumbers = regnumbers.Remove(regnumbers.Length - 2);
    vlaVm.RegistrationNumbers = regnumbers;

    vlaVmList.Add(vlaVm);
}

I get all the values to map apart from the registration numbers which can have a list of vehicles with registration numbers. I'm trying to loop and get the values of vla.vehicles.RegistrationNumber, concatenate and save the results to my view model field. My Automapper code is below

AutoMapper.Mapper.Initialize(config =>
{
    config.CreateMap<Vla, VlaListView>()
        .ForMember(x => x.DateOut, opt => opt.MapFrom(src => src.DateOut.ToShortDateString()))
        .ForMember(x => x.ReturnDate, opt => opt.MapFrom(src => src.ReturnDate.ToShortDateString()))

        // this is the ForMember I can't work out, I can't get the values of the registration numbers
        .ForMember(x => x.RegistrationNumbers, opt => opt.MapFrom(src => src.Vehicles.Select(v => string.Join(", ", v.RegistrationNumber))));
});

Any help with this would be much appreciated.

Upvotes: 1

Views: 216

Answers (1)

Ivan Stoev
Ivan Stoev

Reputation: 205629

You are close, but string.Join should be outside the Select (currently it compiles only because string is IEnumerable<char>, thus hitting this overload, and the results is some strange list of strings with comma concatenated chars):

.ForMember(dest => dest.RegistrationNumbers, opt => opt.MapFrom(src =>
    string.Join(", ", src.Vehicles.Select(v => v.RegistrationNumber))));

Upvotes: 1

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