Automapper Round All Decimal Type Instances

Question

I need a way to add rounding to my automapper configuration. I have tried using the IValueFormatter as suggested here: Automapper Set Decimals to all be 2 decimals

But AutoMapper no longer supports formatters. I don't need to covert it to a different type, so I'm not sure a type converter is the best solution either.

Is there still a good automapper solution for this problem now?

Using AutoMapper version 6.11

Answer 1

This is a complete MCVE demonstrating how you can configure the mapping of decimal to decimal. In this example I round all decimal values to two digits:

public class FooProfile : Profile
{
    public FooProfile()
    {
        CreateMap<decimal, decimal>().ConvertUsing(x=> Math.Round(x,2));
        CreateMap<Foo, Foo>();
    }
}

public class Foo
{
    public decimal X { get; set; }
}

Here, we demonstrate it:

class Program
{
    static void Main(string[] args)
    {
        Mapper.Initialize(x=> x.AddProfile(new FooProfile()));

        var foo = new Foo() { X = 1234.4567M };
        var foo2 = Mapper.Map<Foo>(foo);
        Debug.WriteLine(foo2.X);
    }
}

Expected output:

1234.46

While its true that Automapper knows how to map a decimal to a decimal out of the box, we can override its default configuration and tell it how to map them to suit our needs.