c# - Orchard CMS 中的 Work<> 类是什么？

Question

简单明了，Orchard.Environment.Work<> 的用例是什么？ Orchard\Environment\WorkContextModule.cs 中定义的类？

它可以在几个地方找到，比如

private readonly Work<IContainerService> _containerService;

public Shapes(Work<IContainerService> containerService) {
  _containerService = containerService;
...

是否延迟解析IContainerService ？

Answer 1

Work 类用于延迟加载依赖注入(inject)。实例化类时不解决依赖关系，但仅在调用 Value 属性时解决:

private readonly IMyService _myService;
private readonly IMyOtherService _myOtherService;
public MyClass(Work<IMyService> myService, IMyOtherService myOtherService) {
    // Just assign the Work class to the backing property
    // The dependency won't be resolved until '_myService.Value' is called
    _myService = myService;
    // The IMyOtherService is resolved and assigned to the _myOtherService property
    _myOtherService = myOtherService;
}

现在只有当 _myService.Value 被调用时，IMyService 才会被依赖解析器解析，这让您可以进行延迟加载依赖注入(inject)。