[英]Automapper: Using the structure returned by a custom resolver
With AutoMapper, I am using a ValueResolver that returns a structure like this 使用AutoMapper,我使用ValueResolver返回这样的结构
struct MyStruct
{
public int propA;
public int propB;
public int propC;
}
class MyResolver : ValueResolver<MyViewModel, MyStruct>
{
protected override MyStruct ResolveCore(MyViewModel source)
{
....return MyStruct data
}
}
I returned a structure because the mapping rules are quite complex and I could not write a custom resolver for each properties as they are related to each other. 我返回了一个结构,因为映射规则非常复杂,我无法为每个属性编写自定义解析器,因为它们彼此相关。
So my idea was to do this in one resolver that return a structure and use itike this 所以我的想法是在一个返回结构并使用它的解析器中执行此操作
AutoMapper.Mapper.CreateMap<MyViewModel, myData>()
.ForMember(dest => dest.SomePropA, src => src.ResolveUsing<MyResolver>().propA))
.ForMember(dest => dest.SomePropB, src => src.ResolveUsing<MyResolver>().propB))
Unfortunately, this does not work. 不幸的是,这不起作用。
It looks like src.ResolveUsing<MyResolver>()
is not returning a structure 看起来像
src.ResolveUsing<MyResolver>()
没有返回结构
Any help is more than appreciated. 任何帮助都非常感谢。
Thanks. 谢谢。
By using FromMember
you can pass a property from the source to your ValueResolver. 通过使用
FromMember
您可以将属性从源传递到ValueResolver。
You can use something like this: 你可以使用这样的东西:
.ForMember(dest => dest.SomePropA, opt=> opt.ResolveUsing<MyResolver>().FromMember(src => src.propA))
If you don't specify FromMember
, AutoMapper will pass the source to your ValueResolver. 如果您未指定
FromMember
,AutoMapper会将源传递给您的ValueResolver。
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