我是。net的新手,所以我决定使用。net Core,而不是学习“老方法”。我在这里找到了一篇关于为。net Core设置AutoMapper的详细文章,但是对于新手来说还有更简单的操作指南吗?
当前回答
添加到Arve Systad提到的测试中。如果你像我一样,想要维护utz解决方案中提供的继承结构,你可以像这样设置MapperConfiguration:
var mappingProfile = new MappingProfile();
var config = new MapperConfiguration(cfg =>
{
cfg.AddProfile(mappingProfile);
});
var mapper = new Mapper(config);
我在NUnit中做过这个。
其他回答
我想明白了!细节如下:
Add the main AutoMapper Package to your solution via NuGet. Add the AutoMapper Dependency Injection Package to your solution via NuGet. Create a new class for a mapping profile. (I made a class in the main solution directory called MappingProfile.cs and add the following code.) I'll use a User and UserDto object as an example. public class MappingProfile : Profile { public MappingProfile() { // Add as many of these lines as you need to map your objects CreateMap<User, UserDto>(); CreateMap<UserDto, User>(); } } Then add the AutoMapperConfiguration in the Startup.cs as shown below: public void ConfigureServices(IServiceCollection services) { // .... Ignore code before this // Auto Mapper Configurations var mapperConfig = new MapperConfiguration(mc => { mc.AddProfile(new MappingProfile()); }); IMapper mapper = mapperConfig.CreateMapper(); services.AddSingleton(mapper); services.AddMvc(); } To invoke the mapped object in code, do something like the following: public class UserController : Controller { // Create a field to store the mapper object private readonly IMapper _mapper; // Assign the object in the constructor for dependency injection public UserController(IMapper mapper) { _mapper = mapper; } public async Task<IActionResult> Edit(string id) { // Instantiate source object // (Get it from the database or whatever your code calls for) var user = await _context.Users .SingleOrDefaultAsync(u => u.Id == id); // Instantiate the mapped data transfer object // using the mapper you stored in the private field. // The type of the source object is the first type argument // and the type of the destination is the second. // Pass the source object you just instantiated above // as the argument to the _mapper.Map<>() method. var model = _mapper.Map<UserDto>(user); // .... Do whatever you want after that! } }
需要安装一个安装自动程序的包。
添加AutoMapper.Extensions.Microsoft.DependencyInjection包
之后AddAutoMapper将在服务中可用。
public void ConfigureServices(IServiceCollection services)
{
services.AddAutoMapper(typeof(Startup));
}
创建从Employee类到EmployeeDTO的映射器。
using AutoMapper;
public class AutomapperProfile: Profile
{
public AutomapperProfile()
{
//Source to destination.
CreateMap<Employee,EmployeeDTO>();
}
}
EmployeeController从Employee映射到EmployeeDTo
using System.Collections.Generic;
using AutoMapper;
using Microsoft.AspNetCore.Mvc;
[Route("api/[controller]")]
[ApiController()]
public class EmployeeController : ControllerBase
{
private readonly IMapper _mapper;
public EmployeeController(IMapper mapper)
{
_mapper = mapper;
}
[HttpGet]
public IEnumerable<EmployeeDTO> GetEmployees()
{
/*
Assume it to be a service call/database call
it returns a list of employee, and now we will map it to EmployeeDTO
*/
var employees = Employee.SetupEmployee();
var employeeDTO = _mapper.Map<IEnumerable<EmployeeDTO>>(employees);
return employeeDTO;
}
}
Employee.cs供参考
using System.Collections.Generic;
public class Employee
{
public int EmployeeId { get; set; }
public string EmployeeName { get; set; }
public int Salary { get; set; }
public static IEnumerable<Employee> SetupEmployee()
{
return new List<Employee>()
{
new Employee(){EmployeeId = 1, EmployeeName ="First", Salary=10000},
new Employee(){EmployeeId = 2, EmployeeName ="Second", Salary=20000},
new Employee(){EmployeeId = 3, EmployeeName ="Third", Salary=30000},
new Employee(){EmployeeId = 4, EmployeeName ="Fourth", Salary=40000},
new Employee(){EmployeeId = 5, EmployeeName ="Fifth", Salary=50000}
};
}
}
EmployeeDTO.cs供参考
public class EmployeeDTO
{
public int EmployeeId { get; set; }
public string EmployeeName { get; set; }
}
services.AddAutoMapper ();对我没用。(我用的是Asp。Net Core 2.0)
配置如下
var config = new AutoMapper.MapperConfiguration(cfg =>
{
cfg.CreateMap<ClientCustomer, Models.Customer>();
});
初始化映射器 IMapper mapper = config.CreateMapper();
并将mapper对象作为单例添加到服务中 services.AddSingleton(映射);
这样我就可以添加DI到控制器
private IMapper autoMapper = null;
public VerifyController(IMapper mapper)
{
autoMapper = mapper;
}
我在我的动作方法中使用了如下
ClientCustomer customerObj = autoMapper.Map<ClientCustomer>(customer);
添加到Arve Systad提到的测试中。如果你像我一样,想要维护utz解决方案中提供的继承结构,你可以像这样设置MapperConfiguration:
var mappingProfile = new MappingProfile();
var config = new MapperConfiguration(cfg =>
{
cfg.AddProfile(mappingProfile);
});
var mapper = new Mapper(config);
我在NUnit中做过这个。
theutz的回答很好,我只想补充一点:
如果你让你的映射配置文件继承自MapperConfigurationExpression而不是profile,你可以非常简单地添加一个测试来验证你的映射设置,这总是很方便:
[Fact]
public void MappingProfile_VerifyMappings()
{
var mappingProfile = new MappingProfile();
var config = new MapperConfiguration(mappingProfile);
var mapper = new Mapper(config);
(mapper as IMapper).ConfigurationProvider.AssertConfigurationIsValid();
}
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