映射集合时，将忽略具有Automapper的集合中的项目

Question

I am mapping an collection of items

var List<A> myCollection = new List<A>();

public class A
{
    bool HasChanges {get;set;}
}

var mappedCollection = Map(myCollection);

then I only want to map the items where HasChanges == true

Is this possible?

Answer 1

使用Linq：

var mappedCollection = Map(myCollection.Where(x => x.HasChanges == true).ToList());

Answer 2

Automapper has custom type converters:

https://github.com/AutoMapper/AutoMapper/wiki/Custom-type-converters

// this is your converter
public class ATypeConverter : ITypeConverter<string, A>
{
    public A Convert(ResolutionContext context)
    {
          // implement conversion logic
    }
}

// add this in a bootstrapper in your app
Mapper.CreateMap<string, A>().ConvertUsing<ATypeConverter>();

now after you Map your objects it will convert them using your custom mapper, which will allow you to skip the items with change.