1
Я пытаюсь заменить SimpleIoc на Ninject 3 в приложении WP7. Пока у меня есть Portable.CommonServiceLocator.NinjectAdapter в моем приложении, и он содержит локатор сервисов, но каждый раз, когда я пытаюсь использовать, мое приложение падает, поэтому мне что-то не хватает.Как использовать Ninject с MVVM Light
Простой способ Ioc
using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Ioc;
using Microsoft.Practices.ServiceLocation;
using MvvmLight1.Model;
namespace MvvmLight1.ViewModel
{
public class ViewModelLocator
{
static ViewModelLocator()
{
ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);
if (ViewModelBase.IsInDesignModeStatic)
{
SimpleIoc.Default.Register<IDataService, Design.DesignDataService>();
}
else
{
SimpleIoc.Default.Register<IDataService, DataService>();
}
SimpleIoc.Default.Register<MainViewModel>();
}
/// <summary>
/// Gets the Main property.
/// </summary>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance",
"CA1822:MarkMembersAsStatic",
Justification = "This non-static member is needed for data binding purposes.")]
public MainViewModel Main
{
get
{
return ServiceLocator.Current.GetInstance<MainViewModel>();
}
}
}
Ninject
using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Ioc;
using Microsoft.Practices.ServiceLocation;
using MvvmLight1.Model;
using CommonServiceLocator.NinjectAdapter;
namespace MvvmLight1.ViewModel
{
public class ViewModelLocator
{
static ViewModelLocator()
{
Ninject.StandardKernel k = new Ninject.StandardKernel();
ServiceLocator.SetLocatorProvider(() => new NinjectServiceLocator(k));
k.Bind<IDataService, Design.DesignDataService>();
k.Bind<MainViewModel>().ToSelf();
}
/// <summary>
/// Gets the Main property.
/// </summary>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance",
"CA1822:MarkMembersAsStatic",
Justification = "This non-static member is needed for data binding purposes.")]
public MainViewModel Main
{
get
{
return ServiceLocator.Current.GetInstance<MainViewModel>();
}
}
}
}
Сбои
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance",
"CA1822:MarkMembersAsStatic",
Justification = "This non-static member is needed for data binding purposes.")]
public MainViewModel MainVm
{
get
{
return ServiceLocator.Current.GetInstance<MainViewModel>();
}
}
Microsoft.Practices.ServiceLocation.ActivationException was unhandled
Message=Activation error occured while trying to get instance of type MainViewModel, key ""
StackTrace:
at Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(Type serviceType, String key)
at Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance[TService]()
at PriceCheck.WindowsMobile.ViewModel.ViewModelLocator.get_MainVm()
at PriceCheck.WindowsMobile.Views.MainPage..ctor()
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(RuntimeConstructorInfo rtci, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)
at System.Activator.InternalCreateInstance(Type type, Boolean nonPublic, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type)
at System.Windows.Navigation.PageResourceContentLoader.BeginLoad_OnUIThread(AsyncCallback userCallback, PageResourceContentLoaderAsyncResult result)
at System.Windows.Navigation.PageResourceContentLoader.<>c__DisplayClass4.<BeginLoad>b__0(Object args)
at System.Reflection.RuntimeMethodInfo.InternalInvoke(RuntimeMethodInfo rtmi, Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)
at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)
at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
at System.Delegate.DynamicInvokeOne(Object[] args)
at System.MulticastDelegate.DynamicInvokeImpl(Object[] args)
at System.Delegate.DynamicInvoke(Object[] args)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.Dispatch(DispatcherPriority priority)
at System.Windows.Threading.Dispatcher.OnInvoke(Object context)
at System.Windows.Hosting.CallbackCookie.Invoke(Object[] args)
at System.Windows.Hosting.DelegateWrapper.InternalInvoke(Object[] args)
at System.Windows.RuntimeHost.ManagedHost.InvokeDelegate(IntPtr pHandle, Int32 nParamCount, ScriptParam[] pParams, ScriptParam& pResult)
InnerException: System.TypeLoadException
Message=Could not load type 'Ninject.Infrastructure.ReferenceEqualWeakReference' from assembly 'Ninject.Common, Version=3.0.0.0, Culture=neutral, PublicKeyToken=C7192DC5380945E7'.
StackTrace:
at Ninject.Activation.Strategies.ActivationCacheStrategy.Activate(IContext context, InstanceReference reference)
at Ninject.Activation.Pipeline.<>c__DisplayClass2.<Activate>b__0(IActivationStrategy s)
at Ninject.Infrastructure.Language.ExtensionsForIEnumerableOfT.Map[T](IEnumerable`1 series, Action`1 action)
at Ninject.Activation.Pipeline.Activate(IContext context, InstanceReference reference)
at Ninject.Activation.Context.Resolve()
at Ninject.KernelBase.<>c__DisplayClass13.<Resolve>b__d(IBinding binding)
at System.Linq.Enumerable.<SelectIterator>d__d`2.MoveNext()
at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source)
at Ninject.ResolutionExtensions.Get(IResolutionRoot root, Type service, IParameter[] parameters)
at CommonServiceLocator.NinjectAdapter.NinjectServiceLocator.DoGetInstance(Type serviceType, String key)
at Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(Type serviceType, String key)
at Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance[TService]()
at PriceCheck.WindowsMobile.ViewModel.ViewModelLocator.get_MainVm()
at PriceCheck.WindowsMobile.Views.MainPage..ctor()
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(RuntimeConstructorInfo rtci, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)
at System.Activator.InternalCreateInstance(Type type, Boolean nonPublic, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type)
at System.Windows.Navigation.PageResourceContentLoader.BeginLoad_OnUIThread(AsyncCallback userCallback, PageResourceContentLoaderAsyncResult result)
at System.Windows.Navigation.PageResourceContentLoader.<>c__DisplayClass4.<BeginLoad>b__0(Object args)
at System.Reflection.RuntimeMethodInfo.InternalInvoke(RuntimeMethodInfo rtmi, Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)
at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)
at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
at System.Delegate.DynamicInvokeOne(Object[] args)
at System.MulticastDelegate.DynamicInvokeImpl(Object[] args)
at System.Delegate.DynamicInvoke(Object[] args)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.Dispatch(DispatcherPriority priority)
at System.Windows.Threading.Dispatcher.OnInvoke(Object context)
at System.Windows.Hosting.CallbackCookie.Invoke(Object[] args)
at System.Windows.Hosting.DelegateWrapper.InternalInvoke(Object[] args)
at System.Windows.RuntimeHost.ManagedHost.InvokeDelegate(IntPtr pHandle, Int32 nParamCount, ScriptParam[] pParams, ScriptParam& pResult)
Редактировать
Я также попытался это сделать
IKernel k = new StandardKernel();
k.Bind<IDataService, Design.DesignDataService>();
ServiceLocator.SetLocatorProvider(() => new NinjectServiceLocator(k));
var d = k.Get<IDataService>();
Который дает мне исключение NULL, когда «Get» пытается произойти.
An unhandled exception of type 'System.NullReferenceException' occurred in Ninject.Common.dll
System.NullReferenceException was unhandled
Message=NullReferenceException
StackTrace:
at Ninject.Planning.Bindings.BindingConfiguration.GetProvider(IContext context)
at Ninject.Planning.Bindings.Binding.GetProvider(IContext context)
at Ninject.Activation.Context.GetProvider()
at Ninject.Activation.Context.Resolve()
at Ninject.KernelBase.<>c__DisplayClass13.<Resolve>b__d(IBinding binding)
at System.Linq.Enumerable.<SelectIterator>d__d`2.MoveNext()
at System.Linq.Enumerable.<CastIterator>d__b0`1.MoveNext()
at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source)
at Ninject.ResolutionExtensions.Get[T](IResolutionRoot root, IParameter[] parameters)
at MvvmLight2.ViewModel.ViewModelLocator..cctor()
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(RuntimeConstructorInfo rtci, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)
at System.Reflection.ConstructorInfo.Invoke(Object[] parameters)
at MS.Internal.TypeProxy.<>c__DisplayClass30.<GetCreateObjectDelegate>b__2a()
at MS.Internal.TypeProxy.CreateInstance(UInt32 customTypeId)
at MS.Internal.XamlManagedRuntimeRPInvokes.CreateInstance(XamlTypeToken inXamlType, XamlQualifiedObject& newObject)
at MS.Internal.XcpImports.Application_LoadComponentNative(IntPtr pContext, IntPtr pComponent, UInt32 cUriStringLength, String uriString, UInt32 cXamlStrLength, Byte* pXamlStr, UInt32 cAssemblyStrLength, String assemblyStr)
at MS.Internal.XcpImports.Application_LoadComponent(IManagedPeerBase componentAsDO, String resourceLocator, UnmanagedMemoryStream stream, UInt32 numBytesToRead, String assemblyString)
at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
at MvvmLight2.App.InitializeComponent()
at MvvmLight2.App..ctor()
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(RuntimeConstructorInfo rtci, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)
at System.Reflection.ConstructorInfo.Invoke(Object[] parameters)
at MS.Internal.TypeProxy.<>c__DisplayClass30.<GetCreateObjectDelegate>b__2a()
at MS.Internal.TypeProxy.CreateInstance(UInt32 customTypeId)
at MS.Internal.FrameworkCallbacks.CreateKnownObject(IntPtr nativeRootPeer, UInt32 customTypeId, String initializationString, IntPtr& nativePeer, UInt32 isCreatedByParser)
at MS.Internal.FrameworkCallbacks.CreateUnknownObject(String assemblyName, String typeName, IntPtr nativeRootPeer, String initializationString, UInt32& customTypeId, UInt32& coreTypeId, UInt32& typeFlags, IntPtr& nativePeer)
Редактировать 3
По какой-то причине я переделал мое заявление образец и «Получить» метод, кажется, не быть там. Не уверен, что я потерял какой-то импорт или что-то в этом роде.
Оригинальная проблема все еще существует.
Где вы получаете нулевое исключение с вашим последним попробовать? – Fabrice
На последней строке (var d = k.Get();) –
chobo2
Можете ли вы заменить последнюю строку ServiceLocator.Current.GetInstance(); и попробуй еще раз ? –
Fabrice