AutoMapper中相同实体类型的不同映射规则

在使用AutoMapper进行对象映射时，我们经常会遇到相同实体类型的不同映射规则的情况。这种情况下，我们需要根据不同的需求，为同一实体类型定义不同的映射规则。本文将介绍如何在AutoMapper中处理相同实体类型的不同映射规则，并通过一个案例代码进行演示。

csharp
// 定义实体类型
public class User
{
    public string Name { get; set; }
    public int Age { get; set; }
    public bool IsAdmin { get; set; }
}
// 定义映射配置
public class MappingProfile : Profile
{
    public MappingProfile()
    {
        CreateMap()
            .ForMember(dest => dest.Name, opt => opt.MapFrom(src => src.Name))
            .ForMember(dest => dest.Age, opt => opt.MapFrom(src => src.Age))
            .ForMember(dest => dest.IsAdmin, opt => opt.MapFrom(src => src.IsAdmin));
        // 设置条件映射
        CreateMap()
            .ForMember(dest => dest.Name, opt => opt.MapFrom(src => src.Name))
            .ForMember(dest => dest.Age, opt => opt.MapFrom(src => src.Age))
            .ForMember(dest => dest.IsAdmin, opt => opt.MapFrom(src => src.IsAdmin))
            .ForCondition(src => src.IsAdmin);
    }
}
// 定义DTO类型
public class UserDto
{
    public string Name { get; set; }
    public int Age { get; set; }
    public bool IsAdmin { get; set; }
}
// 使用AutoMapper进行映射
var config = new MapperConfiguration(cfg => cfg.AddProfile());
var mapper = config.CreateMapper();
var user = new User
{
    Name = "John",
    Age = 30,
    IsAdmin = true
};
var userDto = mapper.Map(user);