How to chain NInject modules together

Question

I have a multitier application using NInject to resolve dependency injection. Each tier has a particular NInject module:

Service Layer - ServiceModule
DataLayer - DataModule

In my presentation layer I really dont want to load every single module. Instead of that I want, for an example, load the ServiceModule and the module is responsible to load its dependencies.

How can I achieve that?

For example here is my ServiceModule:

public class ServicesModule : NinjectModule
{
    public override void Load()
    {
        ...
        Bind<IProductService>().To<ProductService>();
        ...
    }
}

Seam

Answer 1

Simple, inside a NInject module you can access the kernel:

Kernel.Load(new [] { new [YourModule]() });

Cerebrum

If you bring in the Ninject namespace by adding using Ninject; you will also get an extension method that provides a Kernel.Load method that makes it even easier... Kernel.Load(params INinjectModule[] modules);. – Vogue

Is there a non-custom way to avoid multiple module initialization when there are shared modules present in the module hierarchy? Suppose I have module A that depends on module C and module B that depends on module C. If I call Kernel.Load(C) in both A and B, Ninject will yell at me saying that module C is already initialized. – Tempting

Answer 2

If your module has a single module it depends on, you can inherit from that module (instead of NinjectModule) and call base.Load():

public override void Load()
{
    base.Load();
    ...
}

This will effectively chain the modules.

Ephemeron

Allthough im not yet that familiar with Ninject, inheriting in general always implies an is Relation. What the OP wants is an association from ServiceModule to DataModule – Nipa