Mapping Generator

"AutoMapper" like, Roslyn based, code fix provider that allows to generate mapping code in design time. Read more Mapping Generator – Design Time Alternative to AutoMapper

You can download it as Visual Studio Extension from Visual Studio Marketplace.

Motivation

The reasons behind why I don't use AutoMapper

Further Development

If you find this extension useful (you feel it helps you on the daily basis) you can support further development by buying me a coffee (it's simple, just click the button below). Sometimes it's hard to stay awake till midnight implementing new features, coffee helps me with that. . I really appreciate your support in any form.

Contributing

Before you start any contributing work, please read the contribution guidline

Supported IDE

VisualStudio.

Install as VSIX from Market place or as a NuGet package. Verify your Roslyn integration option in case you are using R#.

JetBrains Rider

Install as a NuGet package

VSCode

Install as a NuGet package or use this instruction to install from VSIX

Using along with Resharper

If you are not able to open Roslyn refactoring menu (ctr + .) please verify your Resharper settings related to Visual Studio Integration or Visual Studio code analysis (depends on the R# version). For more information please check #50

Main features

Generate mapping method body

Pure mapping method

Non-void method that takes single parameter

public UserDTO Map(UserEntity entity)
{
    
}

Updating method

Void method that takes two parameters

public void Update(UserDTO source, UserEntity target)
{
    
}

Mapping Constructor

Constructor method that takes single complex parameter

public UserDTO(UserEntity user)
{
    
}

Constructor method that takes more than one parameter

public UserDTO(string firstName, string lastName, int age, int cash)
{
}

Updating member method

Void member method that takes single parameter

public void UpdateWith(UserEntity en)
{
    
}

Void member method with more than one parameter

public void Update(string firstName, string lastName, int age)
{
}

Generate inline code for fixing Compiler Errors:

CS0029 Cannot implicitly convert type 'type' to 'type'

CS0266 Cannot implicitly convert type 'type1' to 'type2'. An explicit conversion exists (are you missing a cast?)

CS7036 There is no argument given that corresponds to the required formal parameter

Other mappings

• Complete empty initialization block

• Complete empty initialization block in lambda expression Expression<Func<T,T2>> = (T) => new T2{}

• Provide local accessible variables as parameters for method and constructor invocation

• Create missing mapping lambda
  

• Generate ICloneable interface implementation

Object scaffolding

Mapping rules

• Mapping Property-To-Property

  target.FirstName = source.FirstName;
  target.LastName = source.LastName;
  

• Mapping Method Call-To-Property

  target.Total = source.GetTotal()
  

• Flattening with sub-property

  target.UnitId = source.Unit.Id
  

• Mapping complex property

   target.MainAddress = new AddressDTO(){
  	BuildingNo = source.MainAddress.BuildingNo,
  	City = source.MainAddress.City,
  	FlatNo = source.MainAddress.FlatNo,
  	Street = source.MainAddress.Street,
  	ZipCode = source.MainAddress.ZipCode
  };
  

• Mapping collections

  target.Addresses = source.Addresses.Select(sourceAddresse => new AddressDTO(){
    BuildingNo = sourceAddresse.BuildingNo,
    City = sourceAddresse.City,
    FlatNo = sourceAddresse.FlatNo,
    Street = sourceAddresse.Street,
    ZipCode = sourceAddresse.ZipCode
  }).ToList().AsReadOnly();
  

• Unwrapping wrappers

  customerEntity.Kind = cutomerDTO.Kind.Selected;
  

    public enum CustomerKind
    {
        Regular,
        Premium
    }
  
    public class Dropdown<T>
    {
        public List<T> AllOptions { get; set; }
  
        public T Selected { get; set; }
    }
  
    public class CustomerDTO
    {
        public string Name { get; set; }
        public Dropdown<CustomerKind> Kind { get; set; }
    }
  
    public class UserEntity
    {
        public string Name { get; set; }
        public CustomerKind Kind { get; set; }
    }
  

• Using existing direct mapping constructor

  target.MainAddress = new AddressDTO(source.MainAddress);
  

• using existing multi-parameter constuctor

  this.User =  new UserDTO(firstName: entity.FirstName, lastName: entity.LastName, age: entity.Age);