automapper

问题 I'm updating a project of mine to use AutoMapper 4.2, and I'm running into breaking changes. While I seem to have resolved said changes, I'm not entirely convinced I've done so in the most appropriate way. In the old code, I have a NinjectConfiguration , and an AutoMapperConfiguration class that are each loaded by WebActivator. In the new version the AutoMapperConfiguration drops out and I instead instance a MapperConfiguration directly in the NinjectConfiguration class where the bindings are

问题 I have two models for my form, a ViewModel going to it, and a ControlModel coming from it. The ControlModel has all the same field names and hierarchy, but all of the fields are a string data type. How would you code AutoMapper to convert a string field to integer? I tried Int32.Parse(myString) but Int32 is not available within the expression (gives an error). Mapper.CreateMap<SourceClass, DestinationClass>() .ForMember(dest => dest.myInteger, opt => opt.MapFrom(src => src.myString)); The

问题 Say I have a 'Comment' property on a 'Message' class. I also have 2 class properties which have a 'Body' property. If the class has either of the class properties set, I want AutoMapper to project the Body property into the comment property of the model, otherwise use the normal comment property on the message class. e.g. public class Message { public string Comment { get; set; } public Inbound? InboundMessage { get; set; } public Outbound? OutboundMessage { get; set; } } public class Inbound

问题 I am using AutoMapper 6.2.2 with .NET Core 2.0 and its default dependency injection mechanism to map between models and DTOs. I need DI in my AutoMapper configs because I have to perform an AfterMap<Action> that needs some injected components. The thing is, for some models that have constructors which parameters match some source member, when I enable DI for AutoMapper (add services.AddAutoMapper() ), these constructors are by default called and fed with data, that then breaks my operations

问题 I'm using: AutoMapper 6.1.1 AutoMapper.Extensions.Microsoft.DependencyInjection 3.0.1 It seems my profiles are not being loaded, every time I call the mapper.map I get AutoMapper.AutoMapperMappingException: 'Missing type map configuration or unsupported mapping.' Here my Startup.cs class ConfigureServices method // This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services) { services.AddMvc(); //register

问题 I am reading AutoMapper's ReverseMap() and I can not understand the difference between ForMember() and ForPath() . Implementations was described here. In my experience I achieved with ForMember() . See the following code where I have configured reverse mapping: public class Customer { public string Surname { get; set; } public string Name { get; set; } public int Age { get; set; } } public class CustomerDto { public string CustomerName { get; set; } public int Age { get; set; } } static void

问题 When I try to map an object that has a null string property, the destination is also null. Is there a global settings I can turn on that says all null string should be mapped to empty? 回答1: Something like this should work: public class NullStringConverter : ITypeConverter<string, string> { public string Convert(string source) { return source ?? string.Empty; } } And in your configuration class: public class AutoMapperConfiguration { public static void Configure() { Mapper.CreateMap<string,

问题 What happens when I call Mapper.CreateMap with the same types multiple times? Does it rewrite the previous map? If so, is it possible to make it throw an exception if I try to create map, that is already created? 回答1: When calling Mapper.CreateMap for the same set of source and destination several times, nothing will happen at all as the Mapper.CreateMap<TSource, TDestination>() does not set up any extensions for a mapping configuration. If you set the overrides for IMappingExpression like

问题 public class Foo { public string Baz { get; set; } public List<Bar> Bars { get; set; } } When I map the class above, is there any way to define how deep I want automapper to map objects? Some pseudo code of what I'm after: var mapped = Mapper.Map<FooDTO>(foo, opt => { levels: 0 }); // result = { Baz: "" } var mapped = Mapper.Map<FooDTO>(foo, opt => { levels: 1 }); // result = { Baz: "", Bars: [{ Blah: "" }] } var mapped = Mapper.Map<FooDTO>(foo, opt => { levels: 2 }); // result = { Baz: "",

问题 Suppose a mapping using AutoMapper like bellow: mapItem.ForMember(to => to.SomeProperty, from => { from.Condition(x => ((FromType)x.SourceValue).OtherProperty == "something"); from.MapFrom(x => x.MyProperty); }); What's difference of substitute Condition by PreCondition: from.PreCondition(x => ((FromType)x.SourceValue).OtherProperty == "something"); What's the practical difference between this two methods? 回答1: The diference is that PreCondition is executed before acessing the source value