Dependency Injection with Autofac: Keyed Registration

This will going to be a fifth post in my Dependency Injection series with Autofac. If you have not gone through all the previous post of this series then I would like to encourage you to go through it. Following is a list of blog posts.
Dependency Injection with Autofac : Getting Started
Dependency Injection with Autofac : Constructor Injection
Dependency Injection with Autofac : Module Feature
Dependency Injection with Autofac : Registration Ordering
Dependency Injection with Autofac: Named Registration

Keyed Registration:

There are multiple ways of register and resolving type in Autofac and keyed registration is one of them. Just liked named registration here you can resolve a type with a key. That key can be a valid C# object. Let’s create a sample console application for it. I have added reference of Autofac via NuGet package as did in my previous blog post. Following is a Customer class that I’ve created for the Keyed registration demo.


After creating Customer class following is a code that I’ve written for demo of Keyed Registration with Autofac.
If you see above code carefully, You can see that first I have created a object of customer as keyCustomer then I’ve register customer type with that keyCustomer Object.  After that I’ve resolved customer with that keyCustomer object and assigned few properties and then Print that customer with “PrintCustomer” object.

One thing to note that when you register type with Keyed Registration It can not be resolve without it. You can only resolve that type with same key you have registered.

Now when you run this application. You will following output as expected.


That’s it. Hope you like it. Stay tuned for more!!.

You can find complete source code of this Autofac series on Github at - https://github.com/dotnetjalps/AutofacSamples

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Dependency Injection with Autofac : Named Registration

I’m really having fun with Autofac and It is a great IOC container.  As its tag line suggest it it a addictive IOC container.  This post will be a part of Autofac series. If you have not gone through my previous blog post then I would suggest you go through it. Following is a list of blog post I’ve written for Autofac series.

Dependency Injection with Autofac : Getting Started
Dependency Injection with Autofac : Constructor Injection
Dependency Injection with Autofac : Module Feature
Dependency Injection with Autofac : Registration Ordering

Named Registration:

Named registration can be very useful when you have to create multiple object of same type with different states. Autofac provides that functionalities with Named Registration. I’m going to create a sample console application and added Autofac via Nuget package.  To demonstrate named registration I’ve created customer class like following.


Now let’s write some code to create named instance like following.
As you can see in above code, I have created a named registration with build container and then I have resolve the instance with same name which I have done registration for it. Then I populated properties of Customer and Printed that customer with “Print” function.

One thing to note here that when you register types with named instance then it can not be resolved without name. If try to resolve it it will give error.

Now when you run this application. It will print Customer as expected.



That’s it. Hope you like it. Stay tuned for more!.

You can find complete source code of  this Autofac series on Github at - https://github.com/dotnetjalps/AutofacSamples

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I’m Microsoft MVP again. Thank you all

Today is one of the great day in my life. I’m again an Microsoft MVP for .NET and I’m happiest person on the earth and proud of it. Today’ I got this award for fourth time. Earlier I got this award for year 2010,2011 and 2012 for Visual C#.

I would like to thank all of you readers for making my blog so much popular. Thank you my family who has sacrificed lot of time for writing blog and other community activities. Also  I would like to Mention few people without their support and encouragement it would not have been possible. So special thanks to Mahesh Dhola, Kaushal Bhavsar, Ahmedabad .NET User group , Biplab Paul  and Gandharv Rawat.

I would also like to thank my current and previous Employers who has providing excellent opportunity to be part of .NET Technology world.



Thank you all!.  Stay tune fore more!!.

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