Map objects from multiple properties Automapper

Question

I would appreciate your inputs on accomplishing the mapping for the given scenario.

    class Section1
    {
        public string S1 { get; set; }
        public string S2 { get; set; }
        public string S3 { get; set; }
    }
    class Section2
    {
        public string S4 { get; set; }
        public string S5 { get; set; }
    }
    class Section3
    {
        public string S6 { get; set; }
        public string S7 { get; set; }
    }
    class SectionsInfo
    {
        public Section1 A { get; set; }
        public Section2 B { get; set; }
        public Section3 C { get; set; }
    }
    class SectionsTogetherInStraight
    {
        public string S1 { get; set; }
        public string S2 { get; set; }
        public string S3 { get; set; }
        public string S4 { get; set; }
        public string S5 { get; set; }
        public string S6 { get; set; }
        public string S7 { get; set; }           
    }

I have an object for class SectionsInfo and would like to configure AutoMapper for SectionsTogetherInStraight. Thanks in advance

You can use MapFrom or ConstructUsing methods to flatten the object. More about it here — Neistow
– Neistow, Commented Jun 24, 2021 at 16:24
docs.automapper.org/en/latest/Flattening.html#includemembers — Lucian Bargaoanu
– Lucian Bargaoanu, Commented Jun 24, 2021 at 16:24

Connor Low · Accepted Answer · 2021-06-24 16:37:53Z

3

You want to use Flattening. With your naming convention, you will need to use the IncludeMembers method:

var configuration = new MapperConfiguration(cfg =>
{
    // Pull out the members of A, B, and C from SectionsInfo using IncludeMembers
    cfg.CreateMap<SectionsInfo, SectionsTogetherInStraight>()
        .IncludeMembers(s => s.A, s => s.B, s => s.C);

    // Map each section to the final destination (like normal).
    cfg.CreateMap<Section1, SectionsTogetherInStraight>();
    cfg.CreateMap<Section2, SectionsTogetherInStraight>();
    cfg.CreateMap<Section3, SectionsTogetherInStraight>();
});

answered Jun 24, 2021 at 16:37

Connor Low

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