Configure Profile

Profile purpose: Extract a large number of mapping rules into a standalone class instead of cramming them all into the Main method, making it easier to manage mappings for multiple entities.

1. Custom Profile Class

Inherit from AutoMapper’s Profile base class, define mapping rules inside the constructor, and write multiple CreateMap statements at once.

using AutoMapper;

/// <summary>
/// Mapping configuration class
/// </summary>
public class MappingProfile : Profile
{
    public MappingProfile()
    {
        // Person → People
        CreateMap<Person, People>();
        // People → Person (bidirectional mapping)
        CreateMap<People, Person>();
    }
}
// [Code block Chinese translation]
// 映射配置类
// Person → People
// 双向映射
Code language: HTML, XML (xml)

Method 1: Add Profile during initialization

Mapper.Initialize(x => x.AddProfile<MappingProfile>());
Code language: JavaScript (javascript)

Method 2: Full syntax, instantiate Profile object

var mc = new MapperConfigurationExpression();
mc.AddProfile(new MappingProfile());
Mapper.Initialize(mc);
// [Code block Chinese translation]
// 实例化Profile对象
Code language: JavaScript (javascript)

2. Loading Multiple Profiles

When the project grows complex, you’ll split mappings into multiple Profile classes. You can register them all at once:

Mapper.Initialize(x =>
{
    x.AddProfile<MappingProfile>();
    x.AddProfile<MappingProfile2>();
});
Code language: HTML, XML (xml)

Complete Program Example

class Program
{
    static void Main(string[] args)
    {
        // ========= Configuration: Load Profile mapping =========
        Mapper.Initialize(x => x.AddProfile<MappingProfile>());

        // Source object, target object
        Person p = new Person()
        {
            Age = 12,
            Name = "Tom",
            Birthday = DateTime.Now,
            Sex = true,
            Salary = 10000
        };

        People peo = new People()
        {
            Age = 36,
            Name = "Jack",
            Birthday = DateTime.Now,
            Sex = true,
            Salary = 102000
        };

        // Forward mapping Person → People
        Mapper.Map(p, peo);
        // Reverse mapping People → Person
        Mapper.Map(peo, p);

        Console.WriteLine(peo.Name);
        Console.WriteLine(p.Name);
        Console.ReadKey();
    }
}
// [Code block Chinese translation]
// 配置：加载Profile映射
// 源对象、目标对象
// 正向映射 Person → People
// 反向映射 People → Person
Code language: JavaScript (javascript)

Configure Profile