How can I pass in constructor arguments when I register a type in Unity?

Question

I have the following type being registered in Unity:

container.RegisterType, AzureTable>();

The

Answer 1

Here is an MSDN page describing what you require, Injecting Values. Take a look at using the InjectionConstructor class in your register type line. You will end up with a line like this:

container.RegisterType<IAzureTable<Account>, AzureTable<Account>>(new InjectionConstructor(typeof(CloudStorageAccount)));

The constructor parameters to InjectionConstructor are the values to be passed to your AzureTable<Account>. Any typeof parameters leave unity to resolve the value to use. Otherwise you can just pass your implementation:

CloudStorageAccount account = new CloudStorageAccount();
container.RegisterType<IAzureTable<Account>, AzureTable<Account>>(new InjectionConstructor(account));

Or a named parameter:

container.RegisterType<CloudStorageAccount>("MyAccount");
container.RegisterType<IAzureTable<Account>, AzureTable<Account>>(new InjectionConstructor(new ResolvedParameter<CloudStorageAccount>("MyAccount")));

Answer 2

You could give this a try:

// Register your type:
container.RegisterType<typeof(IAzureTable<Account>), typeof(AzureTable<Account>)>()

// Then you can configure the constructor injection (also works for properties):
container.Configure<InjectedMembers>()
  .ConfigureInjectionFor<typeof(AzureTable<Account>>(
    new InjectionConstructor(myConstructorParam1, "my constructor parameter 2") // etc.
  );

More info from MSDN here.