Question

编辑：正如Kirk Woll正确指出的那样，问题是NLog，而不是NInject。所以让我重新解释一下这个问题：

EDIT2：现在我知道这是NLog + IoC问题，我在ASP.NET MVC2 + Ninject + NLog (+ shared hosting?) = NullReferenceException找到了解决方案

我有一个项目正在使用NInject通过ILogger接口将NLogger类注入到我的所有控制器中。 Steven，为了回答你的问题以保持我的web.config干净，我使用了一个NLog.Config文件来分离出那个配置。

当我在调试模式下定位IIS7时，代码正常工作，但在发布模式下，我得到以下堆栈跟踪。

如果有人知道为什么在调试模式下代码可以工作，为什么在发布它不会，它会非常感激。我还在下面包含了我的NLog配置文件。

<?xml version="1.0"?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <targets>
    <target name="console" xsi:type="ColoredConsole" 
            layout="${date:format=HH\:mm\:ss}|${level}|${stacktrace}|${message}" />
    <target name="file" xsi:type="File" fileName="${basedir}/App_Data//Logs/site.log" 
            layout="${date}: ${message}" />
    <target name="eventlog" xsi:type="EventLog" 
            source="Template" 
            log="Application"
            layout="${date}: ${message} ${stacktrace}" />
  </targets>
  <rules>
    <logger name="*" minlevel="Info" writeTo="file" />
    <logger name="*" minlevel="Fatal" writeTo="eventlog" />        
  </rules>
</nlog>

堆栈追踪：

[NullReferenceException: Object reference not set to an instance of an object.]
   NLog.LogManager.GetCurrentClassLogger() +84
   DynamicInjectorc5f536e7a4564738b2e779e62f9c20c7(Object[] ) +40
   Ninject.Activation.Providers.StandardProvider.Create(IContext context) in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\Activation\Providers\StandardProvider.cs:81
   Ninject.Activation.Context.Resolve() in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\Activation\Context.cs:157
   Ninject.KernelBase.<Resolve>b__7(IContext context) in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\KernelBase.cs:375
   System.Linq.<>c__DisplayClass12`3.<CombineSelectors>b__11(TSource x) +32
   System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +151
   System.Linq.Enumerable.SingleOrDefault(IEnumerable`1 source) +4222965
   Ninject.Planning.Targets.Target`1.GetValue(Type service, IContext parent) in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\Planning\Targets\Target.cs:179
   Ninject.Planning.Targets.Target`1.ResolveWithin(IContext parent) in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\Planning\Targets\Target.cs:147
   Ninject.Activation.Providers.StandardProvider.GetValue(IContext context, ITarget target) in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\Activation\Providers\StandardProvider.cs:97
   Ninject.Activation.Providers.<>c__DisplayClass2.<Create>b__1(ITarget target) in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\Activation\Providers\StandardProvider.cs:81
   System.Linq.WhereSelectArrayIterator`2.MoveNext() +85
   System.Linq.Buffer`1..ctor(IEnumerable`1 source) +217
   System.Linq.Enumerable.ToArray(IEnumerable`1 source) +78
   Ninject.Activation.Providers.StandardProvider.Create(IContext context) in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\Activation\Providers\StandardProvider.cs:81
   Ninject.Activation.Context.Resolve() in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\Activation\Context.cs:157
   Ninject.KernelBase.<Resolve>b__7(IContext context) in c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\KernelBase.cs:375
   System.Linq.<>c__DisplayClass12`3.<CombineSelectors>b__11(TSource x) +32
   System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +151
   System.Linq.Enumerable.SingleOrDefault(IEnumerable`1 source) +4222965
   Ninject.Web.Mvc.NinjectDependencyResolver.GetService(Type serviceType) in c:\Projects\Ninject\Maintenance2.2\ninject.web.mvc\mvc3\src\Ninject.Web.Mvc\NinjectDependencyResolver.cs:56
   System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +51

[InvalidOperationException: An error occurred when trying to create a controller of type 'BossP.Controllers.HomeController'. Make sure that the controller has a parameterless public constructor.]
   System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +182
   System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) +80
   System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName) +74
   System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) +232
   System.Web.Mvc.<>c__DisplayClass6.<BeginProcessRequest>b__2() +49
   System.Web.Mvc.<>c__DisplayClassb`1.<ProcessInApplicationTrust>b__a() +13
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Func`1 func) +124
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +98
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +50
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +16
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8963444
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184

Answer 1

好吧，我花2个晚上进行调查并解决问题。最初我认为这个问题与NLog日志记录框架有关，所以我转而使用Log4Net。这很简单，因为我使用了Ninject.Extensions.Logging。但这没有帮助。

然后我更新到Ninject的预发布版本，异常消息变得更加明确：“无法确定DynamicInjectorb709a37f02d44e5a8615c5fde4e0746d的当前类”。

最后，一些谷歌搜索引导我进行以下讨论：https://groups.google.com/forum/#!msg/ninject/V_bS0ykJxAA/IBnsGVnL50UJ

解决方案：“尝试使用反射，而不是通过将UseReflectionBasedInjection设置为true的NinjectSettings实例创建内核”

Answer 2

我遇到过类似的问题。

我的（简单化）解决方案：

替换这些行

private Logger Logger = LogManager.GetCurrentClassLogger();

通过这一行

private static Logger Logger = LogManager.GetCurrentClassLogger();

“readonly”关键字是可选的。

IIS7中的NLog在发布模式下失败

2 个答案: