I'm trying to map an array of objects containing source classes, which has to be mapped destination classes.
class A
{
public string Id { get; set; }
public string Name { get; set; }
public string Url { get; set; }
public string Details { get; set; }
public string Image { get; set; }
public string Decription{ get; set;}
}
class B
{
public string Id { get; set; }
public string Name { get; set; }
public List<C> { get; set; }
}
class C{
public string Url { get; set; }
public string Details { get; set; }
public string Image { get; set; }
public string Decription{ get; set;}
}
I need to map from List of class B to List class A using auto mapper Kindly help
It's simple. You have to map the information in two steps.
First let's simplify your example:
class A {
public string AttrB { get; set; }
public string AttrC { get; set; }
}
class B {
public string AttrB { get; set; }
}
class C {
public string AttrC { get; set;}
}
To create one object of A from B and C you have to create two maps and use them after each other:
Mapper.CreateMap<B, A>();
Mapper.CreateMap<C, A>();
var c = new C { AttrC = "AttrCValue" };
var b = new B { AttrB = "AttrBValue" };
var a = Mapper.Map<A>(b); // a with the attribute values of b
Mapper.Map(c, a); // map the attribute values of c also into a
I think nothing new for you. But now comes the tricky part. It works with the same principle:
class A {
public string AttrB { get; set; }
public string AttrC { get; set; }
}
class B {
public string AttrB { get; set; }
public List<C> AttrBList { get; set; }
}
class C {
public string AttrC { get; set;}
}
We need another map and a custom converter:
Mapper.CreateMap<B, A>();
Mapper.CreateMap<C, A>();
Mapper.CreateMap<B, IEnumerable<A>>().ConvertUsing<BConverter>();
class BConverter : ITypeConverter<B, IEnumerable<A>> {
public IEnumerable<A> Convert(ResulutionContext ctx) {
B b = (B)ctx.SourceValue;
foreach(var aFromC in b.AttrBList.Select(c => Mapper.Map<A>(c))) { // map c attributes into an a object and return it (through Select it's a mapping for all items of the list AttrBList)
Mapper.Map(b, aFromC); // push the attribute values from b to the aFromC object. Because this is inside the loop, it happens for every Item in the AttrBList array
yield return aFromC;
}
}
}
Now you can use it:
var allAObjects = Mapper.Map<IEnumerable<A>>(listOfBObjects);
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