Automapper AddAfterMapAction不调用方法 [英] Automapper AddAfterMapAction not calling method

问题描述

我正在为Automapper配置文件映射使用全局配置.

I am using global configuration for Automapper profile mapping.

public class StudentProfile : Profile
{
    public StudentProfile()
    {
        CreateMap<Student, StudentVM>()
            .ForMember(dest => dest.school, src => src.Ignore());
    }
}

映射器配置

public static class Configuration
{
    public static IMapper InitializeAutoMapper()
    {
        MapperConfiguration config = new MapperConfiguration(cfg =>
        {
            cfg.AddProfile(new StudentProfile());
        });

        config.AssertConfigurationIsValid();
        return config.CreateMapper();
    }
}

现在，我正在使用Expression添加 .AddAfterMapAction .

Now I am adding .AddAfterMapAction using Expression.

static void Main(string[] args)
    {
        try
        {
            var mapper = Configuration.InitializeAutoMapper();

            foreach (var item in mapper.ConfigurationProvider.GetAllTypeMaps())
            {
                Expression<Action<int>> beforeMapAction = (x) => Test(x);
                item.AddAfterMapAction(beforeMapAction);
            }

            var dest = mapper.Map<Student, StudentVM>(StudentService.GetStudent());

            Console.ReadLine();
        }
        catch (Exception ex)
        {
        }
    }
    public static void Test(int x)
    {
        Console.WriteLine("X = {0}", x);
    }

当我使用以下行进行映射时，它没有调用Test方法:var dest = mapper.Map<Student, StudentVM>(StudentService.GetStudent());

It is not invoking the Test method when I am mapping using this line: var dest = mapper.Map<Student, StudentVM>(StudentService.GetStudent());

我在这里做错什么了吗?因为它应该在映射时调用Test方法.

Am I doing anything wrong here. As it should call the Test method while mapping.

推荐答案

实例化MappingConfiguration后，您将无法修改地图.构建TypeMap后，将创建执行计划，并且该执行计划不能更改.

You can't modify maps after MappingConfiguration is instantiated. Once a TypeMap is built, the execution plan is created and can't change.

您需要将该AfterMap配置移动到您要配置的位置.

You need to move that AfterMap configuration into where you're configuring.

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