创建ABP模块（四）应用层

现在我们创建模块的应用层，首先在项目ZL.MyFirstModule.Application.Contracts中创建Poets目录，在这个目录中创建PoetDto:

using System;
using System.Collections.Generic;
using System.Text;
using Volo.Abp.Application.Dtos;

namespace ZL.MyFirstModule.Poets
{
    public class PoetDto : AuditedEntityDto<Guid>
    {
        public string Name { get; set; }
        public string Description { get; set; }
    }
}

还有创建对象的Dto:

using System.ComponentModel.DataAnnotations;

namespace ZL.MyFirstModule.Poets
{
    public class CreateUpdatePoetDto 
    {
        [Required]
        [StringLength(128)]
        public string Name { get; set; }

        public string Description { get; set; }
    }
}

以及服务接口：

using System;
using System.Collections.Generic;
using System.Text;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Application.Services;

namespace ZL.MyFirstModule.Poets
{
    public interface IPoetAppService : ICrudAppService< //Defines CRUD methods
            PoetDto, //Used to show poets
            Guid, //Primary key of the poet entity
            PagedAndSortedResultRequestDto, //Used for paging/sorting
            CreateUpdatePoetDto> //Used to create/update a poet
    {
    }
}

在ZL.MyFirstModule.Application中创建子目录Poets，在这个目录中创建服务的实现：

namespace ZL.MyFirstModule.Poets
{
    public class PoetAppService :
        CrudAppService<
            Poet, //The Poet entity
            PoetDto, //Used to show poets
            Guid, //Primary key of the book entity
            PagedAndSortedResultRequestDto, //Used for paging/sorting
            CreateUpdatePoetDto>, //Used to create/update a poet
        IPoetAppService
    {
        public PoetAppService(IRepository<Poet, Guid> repository) : base(repository)
        {
        }
    }
}

还需要在MyFirstModuleApplicationAutoMapperProfile创建Dto的映射：

            CreateMap<Poet, PoetDto>();
            CreateMap<CreateUpdatePoetDto, Poet>();

我们还需要修改MyFirstModuleApplicationModule中的映射代码：

using Volo.Abp.Modularity;
using Volo.Abp.Application;

namespace ZL.MyFirstModule
{
    [DependsOn(
        typeof(MyFirstModuleDomainModule),
        typeof(MyFirstModuleApplicationContractsModule),
        typeof(AbpDddApplicationModule),
        typeof(AbpAutoMapperModule)
        )]
    public class MyFirstModuleApplicationModule : AbpModule
    {
        public override void ConfigureServices(ServiceConfigurationContext context)
        {
           // context.Services.AddAutoMapperObjectMapper<MyFirstModuleApplicationModule>();
            Configure<AbpAutoMapperOptions>(options =>
            {
                options.AddMaps<MyFirstModuleApplicationModule>();
               // options.AddMaps<MyFirstModuleApplicationModule>(validate: true);
            });
        }
    }
}

这些工作完成后，就可以运行应用，并使用swagger测试应用层了：

图片.png