I'm just getting to grips with AutoMapper and love how it works. However I believe it can map some complex scenarios that I'm currently wiring up manually. Does anyone have any suggestions / tips to remove my manual processes from the below simplified example and accelerate my learning curve?
I have a source object like so:
public class Source
{
public Dictionary<string, object> Attributes;
public ComplexObject ObjectWeWantAsJson;
}
and a destination object like so:
public class Destination
{
public string Property1; // Matches with Source.Attributes key
public string Property2; // Matches with Source.Attributes key
// etc.
public string Json;
}
My configuration for AutoMapper is minimal:
var config = new MapperConfiguration(cfg => {});
var mapper = config.CreateMapper();
And my conversion code is like so:
var destinationList = new List<Destination>();
foreach (var source in sourceList)
{
var dest = mapper.Map<Dictionary<string, object>, Destination(source.Attributes);
// I'm pretty sure I should be able to combine this with the mapping
// done in line above
dest.Json = JsonConvert.SerializeObject(source.ObjectWeWantAsJson);
// I also get the impression I should be able to map a whole collection
// rather than iterating through each item myself
destinationList.Add(dest);
}
Any pointers or suggestions are most appreciated. Thanks in advance!
you might be interested in writing the conversion code using a TypeConverter
.
internal class CustomConverter : TypeConverter<List<Source>, List<Destination>>
{
protected override List<Destination> ConvertCore(List<Source> source)
{
if (source == null) return null;
if (!source.Any()) return null;
var output = new List<Destination>();
output.AddRange(source.Select(a => new Destination
{
Property1 = (string)a.Attributes["Property1"],
Property2 = (string)a.Attributes["Property2"],
Json = JsonConvert.SerializeObject(a.ObjectWeWantAsJson)
}));
return output;
}
}
var source = new List<Source>
{
new Source{
Attributes = new Dictionary<string,object>{
{"Property1","Property1-Value"},
{"Property2","Property2-Value"}
},
ObjectWeWantAsJson = new ComplexObject{Name = "Test", Age = 27}
}
};
Mapper.CreateMap<List<Source>, List<Destination>>().
ConvertUsing(new CustomConverter());
var dest = Mapper.Map<List<Destination>>(source);
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