什么是工作＆lt;＆gt;在Orchard CMS中的课程？

Question

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

可以在几个地方找到，比如

private readonly Work<IContainerService> _containerService;

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

是否延迟解决IContainerService？

Answer 1

Work类用于延迟加载依赖注入。实例化类时，依赖性未得到解决，但仅在调用Value属性时才解决：

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;
}

现在只有在调用_myService.Value时，依赖性解析器才能解析IMyService，这样就可以处理延迟加载依赖注入。