AutoMapper 9.0的改造

AutoMapper于2019.8.12升级9.0

从此不再支持静态的对象转换

自己琢磨了一下，写了一套扩展

官方链接如下

https://github.com/AutoMapper/AutoMapper/tree/v9.0.0

我做了一下方便使用的简单封装

    public static class AutoMapperExtension{public static IServiceCollection AddAutoMapper(this IServiceCollection service){service.TryAddSingleton<MapperConfigurationExpression>();service.TryAddSingleton(serviceProvider =>{var mapperConfigurationExpression = serviceProvider.GetRequiredService<MapperConfigurationExpression>();var instance = new MapperConfiguration(mapperConfigurationExpression);instance.AssertConfigurationIsValid();return instance;});service.TryAddSingleton(serviceProvider =>{var mapperConfiguration = serviceProvider.GetRequiredService<MapperConfiguration>();return mapperConfiguration.CreateMapper();});return service;}public static IMapperConfigurationExpression UseAutoMapper(this IApplicationBuilder applicationBuilder){return applicationBuilder.ApplicationServices.GetRequiredService<MapperConfigurationExpression>();}}

调用则是在ConfigureServices方法内增加一行

services.AddAutoMapper();

在Configure方法内增加如下代码

            var expression = app.UseAutoMapper();expression.CreateMap<Foo, FoodDto>();

这样就完成了DI版本的AutoMapper

调用例子代码如下

    public class ValuesController : ControllerBase{private IMapper Mapper { get; }public ValuesController(IMapper mapper){Mapper = mapper;}// GET api/values
        [HttpGet]public FoodDto Get(){var model = new Foo(){Id = Guid.NewGuid(),Name = "test",Money = 15.0m};return Mapper.Map<FoodDto>(model);}}

测试结果如下

 

但是仅仅是这样不够的，方便使用的话，还需要一个静态Helper

代码如下

    public static class AutoMapperHelper{private static IServiceProvider ServiceProvider;public static void UseStateAutoMapper(this IApplicationBuilder applicationBuilder){ServiceProvider = applicationBuilder.ApplicationServices;}public static TDestination Map<TDestination>(object source){var mapper = ServiceProvider.GetRequiredService<IMapper>();return mapper.Map<TDestination>(source);}public static TDestination Map<TSource, TDestination>(TSource source){var mapper = ServiceProvider.GetRequiredService<IMapper>();return mapper.Map<TSource, TDestination>(source);}}

同理在Configure方法内增加一行代码

app.UseStateAutoMapper();

增加一个Action调用一下

        [HttpGet("Static")]public FoodDto Static(){var model = new Foo(){Id = Guid.NewGuid(),Name = "test",Money = 15.0m};return AutoMapperHelper.Map<FoodDto>(model);}

调用结果如下

 

大功告成，其实这次更新只是一个思路上的转变，便捷性，都只是小事儿而已

 

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应邀在某个汪姓大佬的要求下，增加两个扩展方法

    public static class AutoMapperHelper{...public static TDestination MapTo<TSource, TDestination>(this TSource source){var mapper = ServiceProvider.GetRequiredService<IMapper>();return mapper.Map<TSource, TDestination>(source);}public static TDestination MapTo<TDestination>(this object source){var mapper = ServiceProvider.GetRequiredService<IMapper>();return mapper.Map<TDestination>(source);}}

测试例子改为

        [HttpGet("Static")]public FoodDto Static(){var model = new Foo(){Id = Guid.NewGuid(),Name = "test",Money = 15.0m};return model.MapTo<FoodDto>();}//[HttpGet("Static")]//public FoodDto Static()//{//    var model = new Foo()//    {//        Id = Guid.NewGuid(),//        Name = "test",//        Money = 15.0m//    };//    return model.MapTo<Foo, FoodDto>();//}