MapperGenerator

A sample mapper using source generator for .NET

Nuget

URL

https://www.nuget.org/packages/MapperGenerator/

Add package refernece to .csproj

<PackageReference Include="MapperGenerator" Version="0.0.2" />

Getting Started

1. Prepare two classes for mapping. Here we create a PersonEntity and a PersonViewModel.

PersonEntity.cs

public class PersonEntity
{
    public int Id { get; set; }
    public string Name { get; set; }
}

PersonViewModel.cs

public class PersonViewModel
{
    public int Id { get; set; }
    public string Name { get; set; }
}

For now we only support fully matched mapping, you need to define same type and naming of properties between two related classes.

2. Plug MappingAttribute to the mapping target.

PersonViewModel.cs

[Mapping(typeof(PersonEntity))]
public class PersonViewModel
{
    public int Id { get; set; }
    public string Name { get; set; }
}

3. Add namespace MapperGenerator to the entry class (ex: Program.cs/Main )

4. Then source generator will automatically generate Mapper.cs which inculded two mapping method.

Mapper.cs

//<auto-generated>
using System;
namespace MapperGenerator
{
    public static class Mapper
    {
        public static MyConsumedApp.Models.PersonViewModel MapToPersonViewModel(MyConsumedApp.Entities.Person source)
        {
            var target = new MyConsumedApp.Models.PersonViewModel();
            target.Id = source.Id;
            target.Name = source.Name;
            return target;
        }

        public static MyConsumedApp.Models.PersonViewModel ToPersonViewModel(this MyConsumedApp.Entities.Person source)
        {
            var target = new MyConsumedApp.Models.PersonViewModel();
            target.Id = source.Id;
            target.Name = source.Name;
            return target;
        }
    }
}

5. Test result

 var personEntity = new Person
{
    Id = 1,
    Name = "Roberson"
};

//static mapping method.
var vm1 = Mapper.MapToPersonViewModel(personEntity);

//extension method.
var vm2 = personEntity.ToPersonViewModel();

Welcome to feedback

Currently it's just a prototype mapper sample created by source generator, welcome to contribute or giving any sugesstion.