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ninject

How do I have Ninject execute a factory I define to create my object?

Can I have Ninject execute a factory I define in order to create, say, object B below?

One way I can think of is by changing Foo's API like so:

class Foo
{
  public Foo(Bar b) { }

  // change API to introduce a new ctor
  [Inject]
  public Foo(Func<Bar> func) { }
}

class Bar { }

Is there an API in-built in Ninject 3.2 that will let me do this?

Solution

  • You can do the following:

    Bind<Bar>().ToMethod(ctx => ... your factory code/call...);

    and then just inject a Bar into foo:

    class Foo
{
    public Foo(Bar b) { }
}

    If you need to control the time when to create the Bar - so if your code needs to call the factory specifically - you can use Ninject.Extensions.Factory. Inject a Func<Bar> barFactory into your Foo and use it to create an instance.