如何在解决方案中查找所有AutoMap配置文件并进行注册

问题描述

我正在使用Net Core 3.1和AutoMapper 10.1.1。

我在不同的项目中都有用于自动映射的解决方案分散配置文件。

如何获取解决方案中所有配置文件的列表并进行注册，而不引用每个项目？

namespace Boilerplate.WepApp.Automap
{
    public class WebAppAutoMap : Profile
    {
    }
}

namespace Boilerplate.Blogs.Automap
{
    public class BlogsAutoMap : Profile
    {
    }
}

并且有一个自动映射器配置代码

namespace Boilerplate.WepApp.Automap
{
    public static class AutoMapperExtensions
    {
        public static void AddAutoMapper(this IServiceCollection services)
        {
            var mapper = new MapperConfiguration(mc =>
            {
                mc.AddProfile(new WebAppAutoMap());
                mc.AddProfile(new BlogsAutoMap());
            }).CreateMapper();

            services.AddSingleton(mapper);
        }
    }
}

如何获取解决方案中所有配置文件的列表并进行注册？

这是必要的，以便不违反整个项目的体系结构。

解决方法

AutoMapper具有一些扩展名，可以扫描AutoMapper类并向服务集合注册配置，映射和扩展名。

您只需要在其中一个扩展上交付图层组件：

curl "https://config.cloud-object-storage.cloud.ibm.com/v1/b/$BUCKET" \
     -H 'Authorization: bearer $TOKEN'

然后，AutoMapper将解决此问题：

public static class ServiceCollectionExtensions
{
    public static IServiceCollection AddAutoMapper(this IServiceCollection services,Action<IMapperConfigurationExpression> configAction)
        => AddAutoMapperClasses(services,(sp,cfg) => configAction?.Invoke(cfg),null);

    public static IServiceCollection AddAutoMapper(this IServiceCollection services,params Assembly[] assemblies)
        => AddAutoMapperClasses(services,null,assemblies);

    public static IServiceCollection AddAutoMapper(this IServiceCollection services,Action<IMapperConfigurationExpression> configAction,assemblies);

    ...

}

DI扩展方法示例

private static IServiceCollection AddAutoMapperClasses(IServiceCollection services,Action<IServiceProvider,IMapperConfigurationExpression> configAction,IEnumerable<Assembly> assembliesToScan,ServiceLifetime serviceLifetime = ServiceLifetime.Transient)
{
   ...

    var assembliesToScanArray = assembliesToScan as Assembly[] ?? assembliesToScan?.ToArray();

   ...
}

或更动感

public static class ConfigureServices
{
    public static IServiceCollection AddAutoMapper(this IServiceCollection services)
        => services.AddAutoMapper(
            AppDomain.CurrentDomain.GetAssemblies()
                .Where(x => x.FullName?
                    .Contains("Boilerplate") ?? false));
}

在启动时使用

public static class ConfigureServices
{
    public static IServiceCollection AddAutoMapper(this IServiceCollection services)
        => services.AddAutoMapper(
            AppDomain.CurrentDomain.GetAssemblies()
                .Where(x => x.FullName?
                    .Contains(GetAssemblySuffix()) ?? false));

    private static string GetAssemblySuffix()
        => Assembly.GetEntryAssembly()?.FullName?.Substring(0,11);
}