.NET CORE使用Mapster

发布时间：2022-04-08 09:34:08来源：ABC=>Go阅读（877）

原文：https://www.cnblogs.com/ABC-wangyuhan/p/15853442.html

1.1 安装两个依赖包
<PackageReference Include="Mapster.DependencyInjection" Version="1.0.0" />
<PackageReference Include="Mapster" Version="7.2.0" />

1.2 配置映射关系

public class InitMapsterAdaptConifg
    {

        public TypeAdapterConfig InitMapperConfig()
        {
            TypeAdapterConfig config = new TypeAdapterConfig();
            config.ForType<School, SchoolDisplayDto>()
                .Map(s => s.SchoolId, d => d.Id)
                .Map(s => s.SchoolIdName, d => d.Id + d.Name)
                .Map(d => d.SchoolName, s => s.Name)
                .IgnoreNullValues(true);

            return config;
        }
    }

1.3 Startup 中注入服务 TypeAdapterConfig 必须Singleton 单例注入

public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton(new InitMapsterAdaptConifg().InitMapperConfig());
            services.AddScoped<IMapper, ServiceMapper>();
        }    

1.4 在服务中注入 调用

private readonly IMapper _mapper;
        public SchoolAppService(ISqlSugarClient context = null, IMapper mapper = null) : base(context)
        {
            base.Context = context;
            _mapper = mapper;
        }   

        public async Task<PagedOutput<SchoolDisplayDto>> GetSchoolPage(SchoolPagedInput input)
        {
            PagedOutput<SchoolDisplayDto> output = new PagedOutput<SchoolDisplayDto>();

            RefAsync<int> total = 0;
            var query = Context.Queryable<School>()
                .WhereIF(!string.IsNullOrWhiteSpace(input.Name), x => x.Name.Contains(input.Name));
            output.TotalCount = await query.CountAsync();
            var scList = await query
                .OrderBy(x => x.Id, OrderByType.Desc)
                .ToPageListAsync(input.PageIndex, input.PageSize, total);
            output.TotalCount = total.Value;
            output.Data = _mapper.Map<IEnumerable<School>, IEnumerable<SchoolDisplayDto>>(scList);
            return output;

        }