NopCommerce源码分析ContainerBuilder builder.Update(container)

依赖注入注册

最新推荐文章于 2023-11-02 11:08:46 发布

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最新推荐文章于 2023-11-02 11:08:46 发布

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文章标签： c#

本文介绍了一个使用Autofac的依赖注入框架实现依赖注册的过程。通过创建并配置ContainerBuilder，注册核心组件和服务，然后调用Update方法更新容器。此外，还介绍了如何通过类型查找器发现依赖注册器，并按顺序调用它们来完成所有依赖项的注册。

        /// <summary>
        /// Register dependencies
        /// </summary>
        /// <param name="config">Config</param>
        protected virtual void RegisterDependencies(NopConfig config)
        {
            var builder = new ContainerBuilder();
            var container = builder.Build();
            this._containerManager = new ContainerManager(container);

            //we create new instance of ContainerBuilder
            //because Build() or Update() method can only be called once on a ContainerBuilder.

            //dependencies
            var typeFinder = new WebAppTypeFinder();
            builder = new ContainerBuilder();
            builder.RegisterInstance(config).As<NopConfig>().SingleInstance();
            builder.RegisterInstance(this).As<IEngine>().SingleInstance();
            builder.RegisterInstance(typeFinder).As<ITypeFinder>().SingleInstance();
            builder.Update(container);

            //register dependencies provided by other assemblies
            builder = new ContainerBuilder();
            var drTypes = typeFinder.FindClassesOfType<IDependencyRegistrar>();
            var drInstances = new List<IDependencyRegistrar>();
            foreach (var drType in drTypes)
                drInstances.Add((IDependencyRegistrar) Activator.CreateInstance(drType));
            //sort
            drInstances = drInstances.AsQueryable().OrderBy(t => t.Order).ToList();
            foreach (var dependencyRegistrar in drInstances)
                dependencyRegistrar.Register(builder, typeFinder, config);
            builder.Update(container);

            //set dependency resolver
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
        }

        #endregion