Ninject.MVC5不生成NinjectWebCommon.Cs

问题描述

我正在Visual Studio 2017 15.4版上开发MVC5项目.我在这里得到了前所未有的结果，这是我从未遇到过的.我已经从nuget安装了Ninject.MVC5软件包.它安装得很好，没有发出任何错误或警告.但是问题是它没有在App_Start文件夹中生成NinjectWebCommon.cs文件.有什么理由吗?

I'm developing a MVC5 project on Visual Studio 2017 Version 15.4. I'm getting unexpected result here what I never faced before. I've installed Ninject.MVC5 package from nuget. It's installing nicely and not giving any error or warning. But problem is it's not generating NinjectWebCommon.cs file in App_Start folder. Is there any reason?

推荐答案

经过大量的搜索和测试，我得到了确切的解决方案，在系统尝试一次与以前的示例一次创建多个实例的同时，我遇到了错误.回答.在这里，我只需要创建NinjectWebCommon类，而无需继承 NinjectHttpApplication.

After lot of search and tests, I've got the exact solution, where I faced error while system was trying to create multiple instances at a time with the previous answer. Here I needed to create NinjectWebCommon class only without inheriting NinjectHttpApplication.

public static class NinjectWebCommon
{
    private static readonly Bootstrapper bootstrapper = new Bootstrapper();

    /// <summary>
    /// Starts the application
    /// </summary>
    public static void Start()
    {
        DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
        DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
        bootstrapper.Initialize(CreateKernel);
    }

    /// <summary>
    /// Stops the application.
    /// </summary>
    public static void Stop()
    {
        bootstrapper.ShutDown();
    }

    /// <summary>
    /// Creates the kernel that will manage your application.
    /// </summary>
    /// <returns>The created kernel.</returns>
    /// <summary>
    /// Creates the kernel that will manage your application.
    /// </summary>
    /// <returns>The created kernel.</returns>
    private static IKernel CreateKernel()
    {
        var kernel = new StandardKernel();
        RegisterServices(kernel);
        return kernel;
    }

    /// <summary>
    /// Load your modules or register your services here!
    /// </summary>
    /// <param name="kernel">The kernel.</param>
    private static void RegisterServices(IKernel kernel)
    {
        kernel.Load(new INinjectModule[]
        {
            new Module()
        });
    }
}

但是这是参数化构造函数的问题.为避免此问题，我添加了一种创建具体实例的方法.所以这是更新的代码.

But here is a problem with parameterized constructor. To avoid this issue I added a method to create Concrete Instance. So here is the updated code..

public static class NinjectWebCommon
{
    private static readonly Bootstrapper bootstrapper = new Bootstrapper();

    /// <summary>
    /// Starts the application
    /// </summary>
    public static void Start()
    {
        DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
        DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
        bootstrapper.Initialize(CreateKernel);
    }

    /// <summary>
    /// Stops the application.
    /// </summary>
    public static void Stop()
    {
        bootstrapper.ShutDown();
    }

    /// <summary>
    /// Creates the kernel that will manage your application.
    /// </summary>
    /// <returns>The created kernel.</returns>
    /// <summary>
    /// Creates the kernel that will manage your application.
    /// </summary>
    /// <returns>The created kernel.</returns>
    private static IKernel CreateKernel()
    {
        return Container;
    }

    public static T GetConcreteInstance<T>()
    {
        object instance = Container.TryGet<T>();
        if (instance != null)
            return (T)instance;
        throw new InvalidOperationException(string.Format("Unable to create an instance of {0}", typeof(T).FullName));
    }

    public static IKernel _container;
    private static IKernel Container
    {
        get
        {
            if (_container == null)
            {
                _container = new StandardKernel();
                _container.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
                _container.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();

                RegisterServices(_container);
            }
            return _container;
        }
    }

    /// <summary>
    /// Load your modules or register your services here!
    /// </summary>
    /// <param name="kernel">The kernel.</param>
    private static void RegisterServices(IKernel kernel)
    {
        kernel.Load(new INinjectModule[]
        {
            new Module()
        });
    }
}

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