ninject Discussions Rss Feed

New Post: How to inject existing instance into target instance?

hlchuah77 — Wed, 28 Nov 2012 04:20:15 GMT

Alright, after numerous trial-and-error processes, I've got the solution and following is the working code:

        IKernel kernel = new StandardKernel();
        kernel.Bind<IFood>().To<AnimalFood>().WithPropertyValue("FoodName", "Pizza");
        IFood food = kernel.Get<IFood>();

        kernel.Bind<IAnimal>().To<Dog>().WithPropertyValue("Name", "Bobby");        
        IAnimal bobbyDog = kernel.Get<IAnimal>();

What happen is, I didn't aware that Ninject cannot inject string type value into property. Though I didn't test further, but I guess it applies the same for all other primitive types such as bool, int, etc.

The other mistake I made was, instead of kernel.Get<IDog>(), I code as kernel.Get<Dog>().

New Post: How to inject existing instance into target instance?

hlchuah77 — Wed, 28 Nov 2012 03:25:58 GMT

I notice that each time when I resolve instance via Ninject kernel (call it InstanceA), Ninject will create a new dependency instance and inject it into my InstanceA.MyProperty.

What I want to achieve is, instead of Ninject to create a new copy of dependency instance, I want Ninject to inject the dependency instance that I have created manually into InstanceA.MyProperty.

I've tried for quite some while and have googled around but I couldn't get any solution. Following is my test code.

        IKernel kernel = new StandardKernel();
        kernel.Bind<IFood>().To<AnimalFood>();
        IFood food = kernel.Get<IFood>();
        food.FoodName = "Pizza";

        kernel.Bind<IAnimal>().To<Dog>().WithPropertyValue("MyFood", food);
        IAnimal bobbyDog = kernel.Get<Dog>();
        bobbyDog.Name = "Bobby";
        //kernel.Inject(bobbyDog);

I expect that the bobbyDog instance will get a food instance with FoodName = "Pizza". However, it turns out not the case.

New Post: XML Extension and Weak Event Message Broker Extension

Elisaveta — Fri, 11 May 2012 12:59:22 GMT

Hello all,

I figure out what was the problem. The few examples with XML Extensions are very shorts and they are saying:

 var settings = new NinjectSettings { LoadExtensions = false };

 kernel = new StandardKernel(settings, new XmlExtensionModule());

 kernel.Load("MyConfigFile.xml");

But LoadExtensions = false exclude auto loading of available modules.
So I changed it to:

 kernel = new StandardKernel();

 kernel.Load("MyConfigFile.xml");
And it works perfect - it loads WeakEventMessageBroker Extension, and XML extension too and events are wired up.

New Post: XML Extension and Weak Event Message Broker Extension

Elisaveta — Thu, 10 May 2012 14:47:56 GMT

Hello,
I am newbie in Ninject and IoC and I want to understand how to use it
properly.
I need to use XML configuration for creating my objects (this is a
requirement) and I done that. But I need to use WeakEventMessageBrorker
too. So when create objects by the code (not with XML config file) the
events are wired together and everything works perfect. When create
objects and load XML file the events are not wired.
My xml file looks like basic.xml from the Ninject.Extension.Xml.Test
project:

, and class form code behind

public override void Load()
{
Bind<IService>().To<MyService>();

}

So what is the difference from both object created by xml config file
and from code behind?
I know that Ninject`s goal is to restrict using of xml, but is there
any chance to use Ninject.Extension.Xml and WeakEventMessageBrorker
together?
Thanks in advance

New Post: Is GitHub or CodePlex the source of truth for Ninject?

callagga — Sun, 25 Apr 2010 20:53:09 GMT

PS Just noted that the ninject.org website says the official wiki is at GitHub, however if you google Ninject the documentation link goes to CodePlex.

<cite>ninject.org/ - </cite>Cached - Similar

Documentation for Ninject

New Post: Is GitHub or CodePlex the source of truth for Ninject?

callagga — Sun, 25 Apr 2010 20:47:37 GMT

Hi,

Just wondering which is the most up-to-date repository, or the source of truth, for Ninject code & doco? Is it CodePlex or GitHub?

thanks

New Post: Extensibility

EisenbergEffect — Thu, 14 Jan 2010 00:40:06 GMT

Ok. I figured it out. I was quite simeple. Remove the IInjectorFactory from the Kernel's components and add a custom factory. Here's how:

Kernel.Components.RemoveAll<IInjectorFactory>();
Kernel.Components.Add<IInjectorFactory, ProxyInjectorFactory>();

public class ProxyInjectorFactory : IInjectorFactory
{
    private readonly DynamicMethodInjectorFactory _inner = new DynamicMethodInjectorFactory();

    public void Dispose()
    {
        _inner.Dispose();
    }

    public INinjectSettings Settings
    {
        get { return _inner.Settings; }
        set { _inner.Settings = value; }
    }

    public ConstructorInjector Create(ConstructorInfo constructor)
    {
        var type = constructor.DeclaringType;
        var behaviors = type.GetAttributes<IBehavior>(true).ToArray();

        return behaviors.Length > 0
                   ? new ConstructorHelper(constructor.DeclaringType, behaviors).CreateConstructor
                   : _inner.Create(constructor);
    }

    public PropertyInjector Create(PropertyInfo property)
    {
        return _inner.Create(property);
    }

    public MethodInjector Create(MethodInfo method)
    {
        return _inner.Create(method);
    }

    private class ConstructorHelper
    {
        private readonly Type _implementation;
        private readonly IBehavior[] _behaviors;

        public ConstructorHelper(Type implementation, IBehavior[] behaviors)
        {
            _implementation = implementation;
            _behaviors = behaviors;
        }

        public object CreateConstructor(params object[] args)
        {
            var factory = ServiceLocator.Current.GetInstance<IProxyFactory>();
            return factory.CreateProxy(
                _implementation,
                _behaviors,
                args
                );
        }
    }
}

New Post: Extensibility

EisenbergEffect — Wed, 13 Jan 2010 19:46:06 GMT

Here's what I want to do. I want to observe every registration that comes through Ninject. If the reg meats certain requirements, I want to alter the reg, essentially by adding a custom provider to replace the default provider. This is because in certain situations, I want to delegate the instantiation to DynamicProxy. My implementation of the proxy factory along with all metadata and methods of determining whether or not interception should occur must not dependent on Ninject. I've found a way to do this with every major IoC container, but I'm struggling with Ninject. Can anyone assist?

New Post: Performance on Mobile devices

DaveKer — Mon, 11 Jan 2010 16:01:51 GMT

Hello

Thanks for the great amount of work you put not only in designing Ninject, but also taking the time to really document and explain it well.

My concern regards using Ninject, or other frameworks like it with mobile devices. I always thought that these types of frameworks would use too much reflection or I would be boxing and unboxing objects too often.

Do you have any input on how efficiently Ninject performs on Windows Mobile devices?

Or any thoughts on the best way to use Ninject for Mobile projects?

Thanks again for Ninject

Dave Kersnowski

New Post: Silverlight 3?

SimpleNick — Fri, 18 Dec 2009 21:51:15 GMT

I have been using Ninject inside a SL 3 app without problem.

New Post: Silverlight 3?

wlcohagan — Wed, 25 Nov 2009 01:50:51 GMT

Does the SL2 version of NInject work with SL3 as well?

Thanks,

Bill

New Post: Would you like any issues logged here?

zerobugbounce — Thu, 17 Sep 2009 07:27:55 GMT

Hi, if we do try out the code from GitHub, would you like us to log any issues here on CodePlex? Or do you prefer getting direct feedback?

Thanks,

ZBB