ASP.NET Core 依赖注入生命周期

Jul 31, 2018#ASP.NET Core41

AI-generated summary

Transient services are stateless, such as repositories in the DAL layer. Scoped services share state within the scope of a request, like services in the BLL layer or controllers. Singleton services share state throughout the entire application, like configuration or caching classes. It is important to ensure thread safety by using thread-safe data structures or locking mechanisms, and to prevent memory leaks by implementing IDisposable to release resources. If unsure of the service's state and usage scenario, Scoped can be chosen as the default lifecycle.

瞬时（Transient）：无状态的服务，比如 DAL 层中的 Repository
作用域（Scoped）：请求范围内共享状态的服务，比如 BLL 层中的 Service、Controller
单例（Singleton）：在整个应用程序中共享状态的服务，比如配置类、缓存类
- 线程安全，使用线程安全的数据结构或者在服务中使用锁机制
- 内存泄漏，使用 IDisposable 释放资源

如果不确定服务的状态和使用场景，可以选择 Scoped 作为默认的生命周期。