在 Automapper CreateMap 和 Projection 中使用枚举作为条件

Question

使用 AutoMapper v6.1

无需硬编码该值来代替枚举 ((int)POStatusOptions.Ordered)，您如何使用投影完成此地图：

CreateMap<WorkOrderDetail, WorkOrderDetailsListViewModel>(MemberList.Destination)
.ForMember(vm => vm.QtyOnPOs, opt => opt.MapFrom(entity =>
    entity.Item.PODetails
        .Where(pod => pod.POHeader.StatusId >= (int)POStatusOptions.Ordered)
        .Sum(pod => pod.QtyOrdered)
        )))

我的自动映射器配置使用的是配置文件。所以我有

我的配置Class:

public static class AutoMapperConfiguration
{
    public static void Configure()
    {
        //see https://github.com/AutoMapper/AutoMapper/wiki/Configuration
        //see https://github.com/AutoMapper/AutoMapper/wiki/Configuration-validation 
        Mapper.Initialize(am =>
        {
            am.AddProfile<AutoMapperViewModelProfile>();
            am.AddProfile<AutoMapperViewModelProfileAdmin>();
        });

        //uncomment this during testing to get a list of all errors in the browser when you run any page in otis
        Mapper.AssertConfigurationIsValid();
    }    
}

在 Application_Start() 中被称为： AutoMapperConfiguration.Configure();

我的个人资料class:

public class AutoMapperViewModelProfile : Profile
{
    public AutoMapperViewModelProfile()
    {
        CreateMap<WorkOrderDetail, WorkOrderDetailsListViewModel>(MemberList.Destination)
        .ForMember(vm => vm.QtyOnPOs, opt => opt.MapFrom(entity =>
            entity.Item.PODetails
            .Where(pod => pod.POHeader.StatusId >= (int)POStatusOptions.Ordered)
            .Sum(pod => pod.QtyOrdered)
        )))
}

Answer 1

在 AutoMapper 中它被称为参数化。请参阅 AutoMapper doc。

你的情况是：

POStatusOption poStatusOption = POStatusOption.Whatever;
CreateMap<WorkOrderDetail, WorkOrderDetailsListViewModel>(MemberList.Destination)
   .ForMember(
      vm => vm.QtyOnPOs, 
      opt => opt.MapFrom(entity =>
         entity.Item.PODetails
            .Where(pod => pod.POHeader.StatusId >= (int)poStatusOption)
            .Sum(pod => pod.QtyOrdered)
      )
   )

你需要这样使用它：

dbContext.WorkOrderDetails.ProjectTo<WorkOrderDetailsListViewModel>(Config, new { poStatusOption = POStatusOptions.Ordered });

在 Automapper CreateMap 和 Projection 中使用枚举作为条件

Using enums as criteria in Automapper CreateMap and Projection

c#

enums

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automapper

automapper-5