[英]Dependency Injection using ninject not working
我的目标很简单:我希望将已经存在的类“ MainWindowVM”(实现IMainWindowVM)的实例注入到“ StaticTestsResultsViewModel”类中。 我不希望实例化类“ MainWindowVM”的新实例。 相反,我希望将此类的现有实例注入到类“ StaticTestsResultsViewModel”中。
我的目标很简单:我希望将已经存在的类“ MainWindowVM”(实现IMainWindowVM)的实例注入到“ StaticTestsResultsViewModel”类中。 我不希望实例化类“ MainWindowVM”的新实例。 相反,我希望将此类的现有实例注入到类“ StaticTestsResultsViewModel”中。
在这种情况下,您应该像这样注册:
kernel.Bind<IMainWindowVM>().To<MainWindowVM>().InSingletonScope();
请记住,当您将一个类注册为单例时,这也会隐式地使其所有依赖项也变为单例。 请参阅强制性依赖 。 如果这对于您的应用程序设计是不可接受的,则应将存储共享属性的单例实例移到MainWindowVM
的依赖项中, 而不要使MainWindowVM
单例(例如瞬态)。
PropertyHolder (Singleton)
/
MainWindowVM (Transient)
\
OtherDependency (Any scope shorter than singleton)
几个月后,我遇到了同样的问题。 从块中删除安装Ninject时创建的类,然后将以下类粘贴到同一目录中。 据我所知,它不需要任何其他配置。 让我知道,
真心的
using Ninject;
using Ninject.Modules;
using Project.Data;
using Project.Interfaces;
using Project.Managers;
using Project.Repository;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Web;
using System.Web.Http;
using System.Web.Http.Dependencies;
namespace Project.App_Start
{
/// <summary>
/// Resolves Dependencies Using Ninject
/// </summary>
public class NinjectHttpResolver : IDependencyResolver, IDependencyScope
{
public IKernel Kernel { get; private set; }
public NinjectHttpResolver(params NinjectModule[] modules)
{
Kernel = new StandardKernel(modules);
}
public NinjectHttpResolver(Assembly assembly)
{
Kernel = new StandardKernel();
Kernel.Load(assembly);
}
public object GetService(Type serviceType)
{
return Kernel.TryGet(serviceType);
}
public IEnumerable<object> GetServices(Type serviceType)
{
return Kernel.GetAll(serviceType);
}
public void Dispose()
{
//Do Nothing
}
public IDependencyScope BeginScope()
{
return this;
}
}
// List and Describe Necessary HttpModules
// This class is optional if you already Have NinjectMvc
public class NinjectHttpModules
{
//Return Lists of Modules in the Application
public static NinjectModule[] Modules
{
get
{
return new[] { new MainModule() };
}
}
//Main Module For Application
public class MainModule : NinjectModule
{
public override void Load()
{
//Configure Your Bindings Here e.g
Kernel.Bind<ILoginManager>().To<LoginManager>();
>
/// Its job is to Register Ninject Modules and Resolve Dependencies
/// </summary>
public class NinjectHttpContainer
{
private static NinjectHttpResolver _resolver;
//Register Ninject Modules
public static void RegisterModules(NinjectModule[] modules)
{
_resolver = new NinjectHttpResolver(modules);
GlobalConfiguration.Configuration.DependencyResolver = _resolver;
}
public static void RegisterAssembly()
{
_resolver = new NinjectHttpResolver(Assembly.GetExecutingAssembly());
//This is where the actual hookup to the Web API Pipeline is done.
GlobalConfiguration.Configuration.DependencyResolver = _resolver;
}
//Manually Resolve Dependencies
public static T Resolve<T>()
{
return _resolver.Kernel.Get<T>();
}
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.