Using AutoMapper on .NET Web API (not Core)

Question

We have this web api below and we would like utilise AutoMapper to simplify this code mapping to DTO or vice versa BUT we haven't found the good setup plus how to use this as most of the docs is either utilising .Net Core or and old version of AutoMapper.

The new version of AutoMapper is version 9.

From what I've seen most the mapping are pretty direct BUT in our case we have a CategoryName which is mapped to x.Category.Name etc etc

Can someone point to the right direction here.

Thanks

[HttpGet]
[Route("api/v1/Activities/{sortfields=Id}/{pagenumber=1}/{pagesize=10}")]
[CacheOutput(ClientTimeSpan = 60, ServerTimeSpan = 60)]
public async Task<IHttpActionResult> GetActivities(string sortfields, int pageNumber, int pageSize)
{
    string userId = User.Identity.GetUserId();

    if (!IsOkPropertyValidate(sortfields))
    {
        return BadRequest("Sort property is incorrect");
    }

    var activities = await db.Activities
                             .Include(b => b.User)
                             .Include(c => c.Category)
                             .Where(q => q.UserId == userId).ToListAsync();

    var noOfRecords = activities.Count();

    var activitiesDTO = await (db.Activities
                                 .Include(b => b.User)
                                 .Include(c => c.Category)
                                 .Where(q => q.UserId == userId)
                                 .Select(x => new ActivityDTO
                                    {
                                        Id = x.Id,
                                        OwnerName = x.User.FirstName + " " + x.User.LastName,
                                        CategoryName = x.Category.Name,
                                        Name = x.Name,
                                        Description = x.Description,
                                        NoOfMinutes = x.NoOfMinutes,
                                        DateCreated = x.DateCreated,
                                        DateModified = x.DateModified,
                                    })
                                 .AsQueryable()
                                 .ApplySort(sortfields)
                                 .Skip((pageNumber - 1) * pageSize)
                                 .Take(pageSize)).ToListAsync();    

    var data = new
        {
            Metadata = new {
                            TotalRecords = noOfRecords,
                            CurrentPageSize = pageSize,
                            CurrentPage = pageNumber,
                            TotalPages = (int)Math.Ceiling(noOfRecords / (double)pageSize)
                        },
            Results = activitiesDTO
        };

    return Ok(paginationMetadata);
}

Check if this helps: stackoverflow.com/questions/42812430/… — Mohsin Mehmood
– Mohsin Mehmood, Commented Sep 15, 2019 at 3:36

awais · Accepted Answer · 2019-09-16 11:16:03Z

1

You need to map your property in ModelMappingProfile class

      public class ModelMappingProfile : Profile
      {
        public ModelMappingProfile()
         {
           CreateMap<Category, ActivityDTO>()
            .ForMember(dto => dto.CategoryName , opts =>
            opts.MapFrom(src => src.Category.Name));
         }
       }

answered Sep 16, 2019 at 11:16

awais

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1 Comment

dcpartners Over a year ago

I do something like this instead: private MapperConfiguration configuration = new MapperConfiguration(cfg => cfg.CreateMap<Activity, ActivityDTO>() .ForMember(dto => dto.OwnerName, conf => conf.MapFrom(ol => ol.User.FirstName + " " + ol.User.LastName)) .ForMember(dto => dto.CategoryName, conf => conf.MapFrom(ol => ol.Category.Name)));

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