Autofac RegisterInstance 与 SingleInstance [英] Autofac RegisterInstance vs SingleInstance

问题描述

IProductRepositoryProxy ProductDataServiceProviderInstance = new ServiceProductDataProvider();
builder.RegisterInstance(ProductDataServiceProviderInstance).As<IProductRepositoryProxy>();

VS

builder.RegisterType<ServiceProductDataProvider>().As<IProductRepositoryProxy>().InstancePerRequest();

我在这里看到了一个前雇员的代码，想知道这个人是否想要注册一个 .SingleInstance() 行为.

I saw this code from an ex-employee here and wonder if the guy wanted to register a .SingleInstance() behavior.

builder.RegisterType<ServiceProductDataProvider>().As<IProductRepositoryProxy>().SingleInstance();

ServiceProductDataProvider 与 RegisterInstance 的手动更新是否与 Register .SingleInstance() 不一样??

Is the manual newing-up of the ServiceProductDataProvider with RegisterInstance not the same as the Register .SingleInstance() ??

推荐答案

ServiceProductDataProvider 与 RegisterInstance 的手动更新是否与 Register .SingleInstance() 不一样??

Is the manual newing-up of the ServiceProductDataProvider with RegisterInstance not the same as the Register .SingleInstance() ??

RegisterInstance 允许您在 AutoFac 中注册单个实例.

The RegisterInstance allows you to register a single instance in AutoFac.

RegisterInstance 和 RegisterType + SingleInstance 方法的区别在于 RegisterInstance 方法允许您注册一个实例不是由 Autofac 构建的.

The difference between RegisterInstance and RegisterType + SingleInstance methods is that the RegisterInstance method allows you to register an instance not built by Autofac.

但是这两种解决方案都会导致在 Autofac 中注册一个单例.

But both solution will result in registering a singleton in Autofac.

顺便说一下，在下面的代码示例中，两者的注册是等价的

By the way, both registration are equivalent in the following code sample

var instance = GetInstanceFromSomewhere(); 

builder.RegisterInstance<IService>(instance); 
builder.Register(c => instance).As<IService>().SingleInstance(); 

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