C# 自动映射-如何映射到三层深度
我正在尝试使用AutoMapper将一个实体与另一个实体(该实体与第三个实体有关系)展平,以查看模型 如何将这三个实体映射为一个实体 资料来源:C# 自动映射-如何映射到三层深度,c#,asp.net-mvc,entity-framework-6,automapper,C#,Asp.net Mvc,Entity Framework 6,Automapper,我正在尝试使用AutoMapper将一个实体与另一个实体(该实体与第三个实体有关系)展平,以查看模型 如何将这三个实体映射为一个实体 资料来源: public class Address { public int AddressId { get; set; } public string AddressLine1 { get; set; } public int CityId { get; set; } public virtual City Cit
public class Address
{
public int AddressId { get; set; }
public string AddressLine1 { get; set; }
public int CityId { get; set; }
public virtual City City { get; set; }
}
public class City
{
public int CityId { get; set; }
public string CityName { get; set; }
public int CountryId { get; set; }
public virtual Country Country { get; set; }
public virtual ICollection<Address> Addresses { get; set; }
}
public class Country
{
public int CountryId { get; set; }
public string CountryName { get; set; }
public virtual ICollection<City> Cities { get; set; }
}
至少有两种方法。如果您以不同的方式命名viewmodel字段,则可能会按照约定进行命名:
Public Class AddressViewModel
{
public int AddressId { get; set; }
public string AddressLine1 { get; set; }
public int CityCityId { get; set; }
[DisplayName("City Name")]
public string CityCityName { get; set; }
public int CityCountryCountryId { get; set; }
[DisplayName("Country Name")]
public string CityCountryCountryName { get; set}
}
如果这太难看,可以在CreateMap中执行:
Mapper.CreateMap<Address, AddressViewModel>()
.ForMember(dest => dest.CityId, opts => opts.MapFrom(src => src.City.CityId))
.ForMember(dest => dest.CityName, opts => opts.MapFrom(src => src.City.CityName))
.ForMember(dest => dest.CountryId, opts => opts.MapFrom(src => src.City.Country.CountryId))
.ForMember(dest => dest.CountryName, opts => opts.MapFrom(src => src.City.Country.CountryName));
Mapper.CreateMap使用Include()查询深层数据的示例:
public AddressViewModel GetAddressById(int id)
{
var result = applicationDbContext.Address
.Include(o=>o.City)
.Include(o=>o.City.Country)
.FirstOrDefault(x=>x.AddressId == id);
return mapper.Map<AddressViewModel>(result);
}
公共地址视图模型GetAddressById(int-id)
{
var result=applicationDbContext.Address
.包括(o=>o.City)
.包括(o=>o.City.Country)
.FirstOrDefault(x=>x.AddressId==id);
返回mapper.Map(结果);
}
您试过其中任何一种吗?我已经尝试了两种解决方案,第一种是达到第二级,只有CityCityName会起作用,但CityCountryCountryName不会——第二种对我也不起作用。是的,我有一些可以达到4级。您的上下文代码是什么样子的?你包括所有级别吗?我现在用include试试,我会回来的
public AddressViewModel GetAddressById(int id)
{
var result = applicationDbContext.Address
.Include(o=>o.City)
.Include(o=>o.City.Country)
.FirstOrDefault(x=>x.AddressId == id);
return mapper.Map<AddressViewModel>(result);
}