CODEWITHSUNDEEP
c#asp.net-mvclinqlambdaautomapper
Nathan R
Nathan R

Reputation: 870

Trying to map a property of an object to a string with AutoMapper

My object Box has the property SerialNumbers, which is a list (or ICollection) of <SerialNumber> objects. I need each SerialNumber's .Name property to be mapped to a string in a list of strings in my BoxedElectrodesRowModel.

Here is my code:

c.CreateMap<Box, BoxedElectrodesRowModel>()
    .ForMember(dest => dest.BoxId, opts => opts.MapFrom(src => src.BoxID))
    .ForMember(dest => dest.SerialNumbers, opts => opts.MapFrom(src => src.SerialNumbers))
    .ForMember(dest => dest.DateCreated, opts => opts.MapFrom(src => src.DateCreated));

If you notice in the third line, I'm trying to convert dest.SerialNumbers (which is a List of strings in the model) to src.SerialNumbers which is an ICollection of SerialNumbers. I specifically need the SerialNumber's name property, though. I've tried to do src.SerialNumbers.Name but LINQ doesn't like that.

My attempt to fix this is to add this code above the previous block:

c.CreateMap<SerialNumber, string>()
    .ConvertUsing(src => src.Name);

But then I get the error "Cannot convert lambda expression to type 'string' because it is not a delegate type".

I'm really quite new to AutoMapper and feel like I'm flailing around in the dark. Can someone help me through this?

Upvotes: 1

Views: 875

Answers (1)

Alex Terry
Alex Terry

Reputation: 2092

Just convert your source to list.

src.SerialNumbers.ToList()

If you need a nested property then select that property first.

src.SerialNumbers.Select(t=>t.Name).ToList()

Upvotes: 1

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