AutoMapper于2019.8.12升級9.0

從此不再支持靜態的對象轉換

自己琢磨了一下，寫了一套擴展

官方鏈接如下

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

我做了一下方便使用的簡單封裝

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>();}}

調用則是在ConfigureServices方法內增加一行

services.AddAutoMapper();

在Configure方法內增加如下代碼

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

這樣就完成了DI版本的AutoMapper

調用例子代碼如下

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);}}

測試結果如下

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但是僅僅是這樣不夠的，方便使用的話，還需要一個靜態Helper

代碼如下

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方法內增加一行代碼

app.UseStateAutoMapper();

增加一個Action調用一下

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

調用結果如下

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大功告成，其實這次更新只是一個思路上的轉變，便捷性，都只是小事兒而已

?

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應邀在某個汪姓大佬的要求下，增加兩個擴展方法

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);}}

測試例子改為

[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>();//}

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轉載于:https://www.cnblogs.com/NCoreCoder/p/11359294.html

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