Error resolving c# Unity constructor

Question

Question Background:

I am currently configuring a Unity container and am having issues setting the constructor of a class.

The class in question's constructor is set as shown. It takes in 3 string parameters and then 2 objects that I am setting up in the container.

public VersionControlFacade(string serverPath, string username, string password, IConnectionManager connectionManager, IPromoManager promoManager)

The configured Unity container for the above class is as shown:

container.RegisterType<IPromoManager, promotionManager>();
container.RegisterType<IConnectionManager, connectionManager>();
container.RegisterType<ITfsVersionControlFacade, TfsVersionControlFacade>(new InjectionConstructor(connectionString, username, password));

The Error:

Currently when trying to resolve the UnityContainer object, the following exception is being thrown:

The type VersionControlFacade does not have a constructor that takes the parameters (String, String, String)

I understand this, I am indeed passing in two other parameters, but it was my belief that as I have registered IPromoManager and IConnectionManager that these would be resolved and automatically injected into the VersionControlFacade constructor?

Can anyone tell me where the logic is wrong here, and what I can do to resolve it?

Your other question (very similar to this one) stackoverflow.com/questions/21675845/… shows that maybe you have a naming problem? You implement VersionControlService even though the constructor you're interested in is VersionControlFacade? — AndyG
– AndyG, Commented Mar 5, 2014 at 16:52

Community · Accepted Answer · 2017-05-23 12:15:08Z

2

I believe you need:

container.RegisterType<ITfsVersionControlFacade, TfsVersionControlFacade>(new InjectionConstructor(connectionString, username, password, typeof(IConnectionManager), typeof(IPromoManager)));

See

Unity InjectionConstructor for multiparam constructor overriding only single one

edited May 23, 2017 at 12:15

CommunityBot

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answered Mar 5, 2014 at 16:52

Alan

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