The request lifetime scope cannot be created because the HttpContext is not available

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项目中应用了Autofac,在Global轮询处理Job的时候,需要获取现有得Service,而这些Service已经通过Autofac进行了配置,所以理所应当的用下面的代码去获取了。

DependencyResolver.Current.GetService<ClinicalCaseService>();

结果出现问题了,直接抛出错误“The request lifetime scope cannot be created because the HttpContext is not available”。

结果疯狂的stackoverflow(地址:https://stackoverflow.com/questions/21804857/autofac-the-request-lifetime-scope-cannot-be-created-because-the-httpcontext-i),查找解决方案。

因为在AutofacDependencyResolver.Current内部GetService的时候需要HttpContext,所以会直接抛出错误。

 

解决方案:

1,autofac

var resolver = new AutofacWebApiDependencyResolver(container);
GlobalConfiguration.Configuration.DependencyResolver = resolver;

 

2,获取Service

ClinicalCaseService = GlobalConfiguration.Configuration.DependencyResolver.GetService(typeof (ClinicalCaseService)) as ClinicalCaseService;

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