C# 使用操作自动映射地图集合

我有以下代码

IList<ConfigurationDto> result = new List<ConfigurationDto>();
foreach (var configuration in await configurations.ToListAsync())
{
    var configurationDto = _mapper.Map<ConfigurationDto>(configuration);
    configurationDto.FilePath = _fileStorage.GetShortTemporaryLink(configuration.FilePath);
    result.Add(configurationDto);
}
return result;

---

您可以使用

IValueResolver

界面将映射配置为从函数映射属性。类似下面的示例

public class CustomResolver : IValueResolver<Configuration, ConfigurationDto, string>
{
    private readonly IFileStorage fileStorage;

    public CustomResolver(IFileStorage fileStorage)
    {
        _fileStorage= fileStorage;
    }

    public int Resolve(Configuration source, ConfigurationDto destination, string member, ResolutionContext context)
    {
        return _fileStorage.GetShortTemporaryLink(source.FilePath);
    }
}

您可以通过以下链接查看有关自定义值解析程序的更多信息：

public class CustomResolver : IValueResolver<Configuration, ConfigurationDto, string>
{
    private readonly IFileStorage fileStorage;

    public CustomResolver(IFileStorage fileStorage)
    {
        _fileStorage= fileStorage;
    }

    public int Resolve(Configuration source, ConfigurationDto destination, string member, ResolutionContext context)
    {
        return _fileStorage.GetShortTemporaryLink(source.FilePath);
    }
}

var configuration = new MapperConfiguration(cfg => cfg.CreateMap<Configuration, ConfigurationDto>()
                   .ForMember(dest => dest.FilePath, opt => opt.MapFrom<CustomResolver>()));