如何使用.NET MVC Ninject注射单例类？ [英] How to use Singleton class injected by .NET MVC Ninject?

问题描述

我有一些问题，InSingletonScope（）。

I have some problem with InSingletonScope().

我的界面：

public interface ISettingsManager
    {
        ApplicationSettings Application { get; }
    }

和我的类：

public class SettingsManager : ISettingsManager
    {
        private readonly IConfigurationService _configurationService;

        private readonly Lazy<ApplicationSettings> _applicationSettings;
        public ApplicationSettings Application { get { return _applicationSettings.Value; } }

        private SettingsManager(IConfigurationService context)
        {
             _configurationService = context;

            _applicationSettings = new Lazy<ApplicationSettings>(() => new ApplicationSettings(context));
        }
}

和结合这个样子的：

kernel.Bind<ISettingsManager>().To<SettingsManager>().InSingletonScope();

你怎么看待这种做法？

What do you think about this approach?

例如，在HomeControler，当我补充一下：

For example, in HomeControler, when I'm add:

[Inject]
SettingsManager _settingsManager;

在 _settingsManager 总是空。

我怎么可以使用设定管理单在另一个项目中？我总是空。

How I can use SettingsManager singleton in another project? I always get null.

推荐答案

您需要更改_settingsManager有型ISettingsManager，而不是设置管理的。

You need to change your _settingsManager to have a type of ISettingsManager instead of SettingsManager.

（你结合ISettingsManager来设定管理。这意味着，当Ninject上看到ISettingsManager依赖它会注入设定管理。如果事情是直接宣布为设定管理它不会做任何事情）

(You're binding ISettingsManager to SettingsManager. This means when Ninject sees a dependency on ISettingsManager it will inject a SettingsManager. If something is directly declared as SettingsManager it won't do anything)

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