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0

In .NET framework, you can use Ninject to achieve contextual binding.

So for example:

Bind<IWarrior>().To<Samurai>().WhenInjectedInto(typeof(OnLandAttack));
Bind<IWarrior>().To<SpecialNinja>().WhenInjectedInto(typeof(AmphibiousAttack));

This means you can inject different concrete implementations depending on what you're injecting into.

I cannot see any method to achieve the same thing in .NET Core 2.2 - is this not possible, or does it just require a bunch of extra configuration?

Example code from the Ninject site

c# asp.net-core dependency-injection .net-core ninject

share|improve this question

asked Mar 24 at 18:01

ib4nezib4nez

307

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What do you mean when you say you can't see the method? You took the code above from the docs, does it not work?
  
  – DavidG
  Mar 24 at 18:14
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I was under the impression this was unavailable in .NET Core @DavidG
  
  – ib4nez
  Mar 24 at 18:20
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  There is no such feature in MS.DI.
  
  – Steven
  Mar 24 at 18:53
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  See this so answer
  
  – Kalten
  Mar 24 at 22:30
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Microsoft.Extensions.DependencyInjection does not technically support contextual binding, though you can do this is a somewhat limited way via the factory overloads, i.e. you can provide a lamba "factory" as the service registration, and inside that lambda make determinations about what actual instance to return. If you need something more robust than that, then you will need to use an alternate DI container such as Autofac. See: github.com/aspnet/Extensions/tree/master/src/…. Ninject, it should be noted, is not currently supported, though.
  
  – Chris Pratt
  Mar 25 at 16:44
  

  
  
  
  

add a comment | 

0

In .NET framework, you can use Ninject to achieve contextual binding.

So for example:

Bind<IWarrior>().To<Samurai>().WhenInjectedInto(typeof(OnLandAttack));
Bind<IWarrior>().To<SpecialNinja>().WhenInjectedInto(typeof(AmphibiousAttack));

This means you can inject different concrete implementations depending on what you're injecting into.

I cannot see any method to achieve the same thing in .NET Core 2.2 - is this not possible, or does it just require a bunch of extra configuration?

Example code from the Ninject site

c# asp.net-core dependency-injection .net-core ninject

share|improve this question

asked Mar 24 at 18:01

ib4nezib4nez

307

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What do you mean when you say you can't see the method? You took the code above from the docs, does it not work?
  
  – DavidG
  Mar 24 at 18:14
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I was under the impression this was unavailable in .NET Core @DavidG
  
  – ib4nez
  Mar 24 at 18:20
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  There is no such feature in MS.DI.
  
  – Steven
  Mar 24 at 18:53
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  See this so answer
  
  – Kalten
  Mar 24 at 22:30
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Microsoft.Extensions.DependencyInjection does not technically support contextual binding, though you can do this is a somewhat limited way via the factory overloads, i.e. you can provide a lamba "factory" as the service registration, and inside that lambda make determinations about what actual instance to return. If you need something more robust than that, then you will need to use an alternate DI container such as Autofac. See: github.com/aspnet/Extensions/tree/master/src/…. Ninject, it should be noted, is not currently supported, though.
  
  – Chris Pratt
  Mar 25 at 16:44
  

  
  
  
  

add a comment | 

In .NET framework, you can use Ninject to achieve contextual binding.

So for example:

Bind<IWarrior>().To<Samurai>().WhenInjectedInto(typeof(OnLandAttack));
Bind<IWarrior>().To<SpecialNinja>().WhenInjectedInto(typeof(AmphibiousAttack));

This means you can inject different concrete implementations depending on what you're injecting into.

I cannot see any method to achieve the same thing in .NET Core 2.2 - is this not possible, or does it just require a bunch of extra configuration?

Example code from the Ninject site

c# asp.net-core dependency-injection .net-core ninject

share|improve this question

asked Mar 24 at 18:01

ib4nezib4nez

307

Bind<IWarrior>().To<Samurai>().WhenInjectedInto(typeof(OnLandAttack));
Bind<IWarrior>().To<SpecialNinja>().WhenInjectedInto(typeof(AmphibiousAttack));

share|improve this question

asked Mar 24 at 18:01

ib4nezib4nez

307

share|improve this question

asked Mar 24 at 18:01

ib4nezib4nez

307

asked Mar 24 at 18:01

ib4nezib4nez

307

asked Mar 24 at 18:01

ib4nezib4nez

307