使用Ninject与Ninject.Extensions.Nlog2的Null引用异常

Question

我有一个简单的控制台应用程序使用Ninject，Ninject.Logging和Ninject.Extensions.NLog2都使用最新的nuget包构建。

我的应用程序执行以下操作

 _kernel = new StandardKernel();
 ILogger logger = _kernel.Get<ILogger>();

调用Get<ILogger>()时，我从StandardKernel获得Null Reference异常

System.NullReferenceException was unhandled by user code
  HResult=-2147467261
  Message=Object reference not set to an instance of an object.    
  Source=Ninject.Extensions.Logging
  StackTrace:
       at Ninject.Extensions.Logging.LoggerFactoryBase.GetLogger(IContext context) in     c:\Projects\Ninject\ninject.extensions.logging\src\Ninject.Extensions.Logging\LoggerFactoryBase.cs:line 61
   at Ninject.Extensions.Logging.LoggerModuleBase.<Load>b__0(IContext context) in c:\Projects\Ninject\ninject.extensions.logging\src\Ninject.Extensions.Logging\LoggerModuleBase.cs:line 26
   at Ninject.Activation.Providers.CallbackProvider`1.CreateInstance(IContext context) in c:\Projects\Ninject\ninject\src\Ninject\Activation\Providers\CallbackProvider.cs:line 45
   at Ninject.Activation.Provider`1.Create(IContext context) in c:\Projects\Ninject\ninject\src\Ninject\Activation\Provider.cs:line 38
   at Ninject.Activation.Context.Resolve() in c:\Projects\Ninject\ninject\src\Ninject\Activation\Context.cs:line 157
   at Ninject.KernelBase.<>c__DisplayClass10.<Resolve>b__c(IBinding binding) in c:\Projects\Ninject\ninject\src\Ninject\KernelBase.cs:line 386
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Linq.Enumerable.<CastIterator>d__b1`1.MoveNext()
   at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source)
   at Ninject.ResolutionExtensions.Get[T](IResolutionRoot root, IParameter[] parameters) in c:\Projects\Ninject\ninject\src\Ninject\Syntax\ResolutionExtensions.cs:line 37

我需要更多的配置来进行日志记录工作吗？

Answer 1

你不应该直接要求一个ILogger （虽然错误信息可能会更好一点）但你应该解决一个ILoggerFactory ，你可以要求ILogger

_kernel = new StandardKernel();
ILoggerFactory loggerFactory = _kernel.Get<ILoggerFactory>();
ILogger logger = loggerFactory.GetCurrentClassLogger();

另请参阅文档自己请求记录器部分。