.netCore2.0 程序集DI依赖注入

/// <summary> ???????/// 通过程序集的名称加载程序集 ???????/// </summary> ???????/// <param name="assemblyName"></param> ???????/// <returns></returns> ???????public static Assembly GetAssemblyByName(string assemblyName) ???????{ ??????????return AssemblyLoadContext.Default.LoadFromAssemblyName(new AssemblyName(assemblyName)); ???????}

/// <summary> ???????/// 程序集依赖注入 ???????/// </summary> ???????/// <param name="services">服务实例</param> ???????/// <param name="assemblyName">程序集名称。不带DLL</param> ???????/// <param name="serviceLifetime">依赖注入的类型 可为空</param> ???????public static void AddAssembly(this IServiceCollection services, string assemblyName, ServiceLifetime serviceLifetime = ServiceLifetime.Scoped) ???????{ ???????????if (services == null) ???????????????throw new ArgumentNullException(nameof(services) + "为空"); ???????????if (String.IsNullOrEmpty(assemblyName)) ???????????????throw new ArgumentNullException(nameof(assemblyName) + "为空"); ???????????var assembly = RuntimeHelper.GetAssemblyByName(assemblyName); ???????????if (assembly == null) ???????????????throw new DllNotFoundException(nameof(assembly) + ".dll不存在"); ???????????//找到当前程序集的类集合 ???????????var types = assembly.GetTypes(); ???????????//过滤筛选（是类文件，并且不是抽象类，不是泛型） ???????????var list = types.Where(o => o.IsClass && !o.IsAbstract && !o.IsGenericType).ToList(); ???????????if (list == null && !list.Any()) ???????????????return; ???????????//遍历获取到的类 ???????????foreach (var type in list) ???????????{ ???????????????//然后获取到类对应的接口 ???????????????var interfacesList = type.GetInterfaces(); ???????????????//校验接口存在则继续 ???????????????if (interfacesList == null || !interfacesList.Any()) ???????????????????continue; ???????????????//获取到接口（第一个） ???????????????var inter = interfacesList.First(); ???????????????switch (serviceLifetime) ???????????????{ ???????????????????//根据条件，选择注册依赖的方法 ???????????????????case ServiceLifetime.Scoped: ???????????????????????//将获取到的接口和类注册进去 ???????????????????????services.AddScoped(inter, type); ???????????????????????break; ???????????????????case ServiceLifetime.Singleton: ???????????????????????services.AddScoped(inter, type); ???????????????????????break; ???????????????????case ServiceLifetime.Transient: ???????????????????????services.AddTransient(inter, type); ???????????????????????break; ???????????????} ???????????} ???????}