Can a controller have constructor with parameters?

Can a controller have constructor with parameters?

There is only one prerequisite, that is controller class must have a parameter less constructor. Simply framework will fail to create those controllers object that have parameterized constructor. In that case we need to create controller objects by our self and inject controller parameters there.

How can use dependency injection in MVC controller?

How To Implement Dependency Injection In MVC Project

1. Open Visual Studio, go to File->New->Project.
2. Select “Web” from the left menu, “ASP.NET Web Application (.
3. Select “Empty” template, check MVC Checkbox below, and click “OK”.
4. Open Solution Explorer, it will create the folder structure as shown below.

How does MVC pass parameters to the controller?

In routeData you can specify name/value pairs (e.g., routeData [“page\\ = 5), and in the controller Index function corresponding parameters receive the value. That is, will have page passed as 5. I have to admit, it’s quite unusual that string (“page”) automagically becomes a variable – but that’s how MVC works in other languages as well…

Can a childcontroller be a base class constructor?

So, since ChildController IS A BaseController, there is nothing wrong or strange about passing parameters in the child controllers constructor that calls the base classes constructor. This is the way it should be done. If you change your base class, you will likely have to change your child classes anyways.

How to create a base controller in MVC 5?

I have a base controller in my MVC 5 project which implements some shared functionality. This functionality requires some dependencies. I am using Unity 3 to inject these implementations into my controllers, a pattern which has worked fine until I switched my controllers to inherit from this base controller.

How to make a parameter optional in MVC?

And when I run it I get an error stating: The parameters dictionary does not contain a valid value of type ‘System.Int32’ for parameter ‘firstItem’. To make a parameter optional its type should either be a reference type or a Nullable type.