值不能为空。参数名: key
自从我将StructureMapControllerFactory作为我的DefaultControllerFactory实现后,我开始出现这个错误。
实际上,我是从MVC示例应用程序StoreFront中复制的代码,但我无法弄清楚为什么这个错误一直弹出。即使出现这个错误,应用程序仍然运行。
这个错误的原因可能是什么?
谢谢你的时间。
System.ArgumentNullException was unhandled by user code
Message="Value cannot be null.\r\nParameter name: key"
Source="mscorlib"
ParamName="key"
StackTrace:
at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
at System.Collections.Generic.Dictionary`2.ContainsKey(TKey key)
at StructureMap.Util.Cache`2.get_Item(KEY key)
at StructureMap.BuildSession.CreateInstance(Type pluginType)
at StructureMap.Container.GetInstance(Type pluginType)
at StructureMap.ObjectFactory.GetInstance(Type pluginType)
at Yacht.Web.Controllers.StructureMapControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) in D:\Documents\WebSites\JOBS\Yacht\Yacht.Web\Controllers\StructureMapControllerFactory.cs:line 16
at System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName)
at System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory)
at System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state)
at System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state)
at System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
InnerException:
这是StructureMapControllerFactory类
public class StructureMapControllerFactory : DefaultControllerFactory
{
protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext, Type controllerType)
{
return ObjectFactory.GetInstance(controllerType) as Controller;
}
}