AutoMapper从源嵌套集合映射到另一个集合

Question

编辑:标题不正确,我试图从源列表映射到嵌套模型的源列表.

我在尝试将列表映射到嵌套模型中列出的另一个列表时遇到问题.种类和不平整的种类.问题是我不知道如何做映射.

这是我的设置跟随我失败的映射尝试:

public class DestinationModel
{
    public DestinationNestedViewModel sestinationNestedViewModel { get; set; }
}

public class DestinationNestedViewModel
{
    public List<ItemModel> NestedList { get; set; }
}

public class SourceModel
{
    public List<Item> SourceList { get; set; }
}

其中Item和ItemModel已经在它们之间定义了映射

我不能这样做......

Mapper.CreateMap<SourceModel, DestinationModel>()
.ForMember(d => d.DestinationNestedViewModel.NestedList,
    opt => opt.MapFrom(src => src.SourceList))

错误:

表达式'd => d.DestinationNestedViewModel.NestedList'必须解析为顶级成员.参数名称:lambdaExpression

然后我尝试了这样的事情:

.ForMember(d => d.DestinationNestedViewModel, 
 o => o.MapFrom(t => new DestinationNestedViewModel { NestedList = t.SourceList }))

那里的问题是 NestedList = t.SourceList.它们分别包含不同的元素,ItemModel和Item.所以,他们需要被映射.

我该如何映射？

Answer 1

我想你想要这样的东西:

Mapper.CreateMap<Item, ItemModel>();

/* Create a mapping from Source to Destination, but map the nested property from 
   the source itself */
Mapper.CreateMap<SourceModel, DestinationModel>()
    .ForMember(dest => dest.DestinationNestedViewModel, opt => opt.MapFrom(src => src));

/* Then also create a mapping from Source to DestinationNestedViewModel: */
Mapper.CreateMap<SourceModel, DestinationNestedViewModel>()
    .ForMember(dest => dest.NestedList, opt => opt.MapFrom(src => src.SourceList));

那么你所要做的就是Mapper.Map在Source和之间打电话Destination:

Mapper.Map<SourceModel, DestinationModel>(source);