Field to field mapping between list of dynamic and list of class with automapper

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I have bellow function which returns a list of dynamic object

C#

public List<dynamic> getlist()
            {
                List<dynamic> d = new List<dynamic>();
    
                d.Add(new { Name = "A", Age = 12 });
                d.Add(new { Name = "B", Age = 10 });
                d.Add(new { Name = "C", Age = 15 });
                d.Add(new { Name = "D", Age = 18 });
                d.Add(new { Name = "E", Age = 17 });
    
                return d;
    
            }

and also have a class

C#

public class testclass
        {
            public string letter { get; set; }
            public Int64 frequency { get; set; }
        }

I use AutoMapper.5.2.0 .I want to map the dynamic list with the list of **testclass** class .
can anybody give an example how to do this?

What I have tried:

..............................................................

Posted 7-Feb-17 4:27am

KuntalBose

Updated 7-Feb-17 6:28am

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Richard Deeming · Answer 1 · 2017-02-07T06:28:00

Assuming you want a direct mapping from one type to the other, something like this should work:

static void CreateDynamicTestClassMap(IMapperConfigurationExpression configuration)
{
    var dynamicObject = new { Name = default(string), Age = default(int) };
    var map = configuration.CreateMap(dynamicObject.GetType(), typeof(testclass));
    map.ForMember(nameof(testclass.letter), o => o.MapFrom(nameof(dynamicObject.Name)));
    map.ForMember(nameof(testclass.frequency), o => o.MapFrom(nameof(dynamicObject.Age)));
}

...

var config = new MapperConfiguration(CreateDynamicTestClassMap);
config.AssertConfigurationIsValid();

var mapper = config.CreateMapper();
var listOfTestClass = GetList().Select(mapper.Map<testclass>).ToList();

NB: The CreateDynamicTestClassMap method will need to be in the same assembly as your GetList method, otherwise the two dynamic types will not match.