RSGC – DTO Mapper – part 6
| name | GeneratedMapper |
| nuget |
https://www.nuget.org/packages/GeneratedMapper/ |
| link | https://github.com/ThomasBleijendaal/GeneratedMapper |
| author | Thomas Bleijendaal |
AutoMapping from a POCO to a DTO. Lots of customizations
The code that you start with is
public class Department
{
public int ID { get; set; }
public string Name { get; set; }
public List<string> Employees { get; set; }
}
[IgnoreInTarget("Employees")]
[MapFrom(typeof(Department))]
public class DepartmentDTO
{
public int ID { get; set; }
public string Name{get; set;}
[MapWith("Employees",typeof(ResolverLength))]
public int EmployeesNr { get; set; }
}
public class ResolverLength
{
public int Resolve(List<string> input)
{
return ((input?.Count) ?? 0);
}
}
The code that you will use is
static void Main(string[] args)
{
var dep = new Department();
dep.Name = "IT";
dep.ID = 1;
dep.Employees = new List<string>();
dep.Employees.Add("Andrei");
var dto = dep.MapToDepartmentDTO();
Console.WriteLine(dto.Name+"=>"+ dto.EmployeesNr);
}
The code that is generated is
namespace DTOMapper
{
public static partial class DepartmentMapToExtensions
{
public static DTOMapper.DepartmentDTO MapToDepartmentDTO(this DTOMapper.Department self)
{
if (self is null)
{
throw new ArgumentNullException(nameof(self), "DTOMapper.Department -> DTOMapper.DepartmentDTO: Source is null.");
}
var resolverLength = new DTOMapper.ResolverLength();
var target = new DTOMapper.DepartmentDTO
{
ID = self.ID,
Name = (self.Name ?? throw new GeneratedMapper.Exceptions.PropertyNullException("DTOMapper.Department -> DTOMapper.DepartmentDTO: Property Name is null.")),
EmployeesNr = resolverLength.Resolve((self.Employees ?? throw new GeneratedMapper.Exceptions.PropertyNullException("DTOMapper.Department -> DTOMapper.DepartmentDTO: Property Employees is null."))),
};
return target;
}
}
}
Example Code: https://github.com/ignatandrei/RSCG_Examples/tree/main/DTOMapper