SimpleInjector: Registration of class that has data parameters, and a dependency

Question

Registration of a service that has only data parameters in it's ctor is easy enough.

string emailHost = "emailHost";
int emailPort = 25;
string emailFrom = "fake@fake.cc";

container.Register<IEmailManager>(
    () => new EmailManager(emailHost, emailPort, emailFrom),
    Lifestyle.Singleton);

But how do I do it if the class/service has data paramters, and an injected service? How can I get that registered SmsNumberFormatter into SmsManager, which still providing the sms configuration data via ctor?

string smsAccountSid = "sid";
string smsAuthToken = "token";
string smsFromNumber = "##########";

container.Register<ISmsNumberFormatter, SmsNumberFormatter>(
    Lifestyle.Singleton);

container.Register<ISmsManager>(
    () => new SmsManager(
        new SmsNumberFormatter(), smsAccountSid, smsAuthToken, smsFromNumber), 
    Lifestyle.Singleton);

SimpleInjector: v 3.3.2.0

Answer 1

You have two options:

1. Use the container to obtain your dependency

container.Register<ISmsManager>(() => 
        new SmsManager(container.GetInstance<ISmsNumberFormatter>(),
        smsAccountSid, 
        smsAuthToken, 
        smsFromNumber), Lifestyle.Singleton);

2. Turn your basic type parameters into a single injectable class

public class SmsManagerOptions
{
    public SmsManagerOptions(string smsAccountSid, string smsAuthToken, string smsFromNumber)
    {
        SmsAccountSid = smsAccountSid ?? throw new ArgumentNullException(nameof(smsAccountSid));
        SmsAuthToken = smsAuthToken ?? throw new ArgumentNullException(nameof(smsAuthToken));
        SmsFromNumber = smsFromNumber ?? throw new ArgumentNullException(nameof(smsFromNumber));
    }

    public string SmsAccountSid { get; }
    public string SmsAuthToken { get; }
    public string SmsFromNumber { get; }
}

You than need, of course, to change the SmsManager ctor to something like public SmsManager(ISmsNumberFormatter formatter, SmsManagerOptions options).

Then in your DI registration method:

var options = new SmsManagerOptions("sid", "token", "######");

container.Register<ISmsNumberFormatter, SmsNumberFormatter>(Lifestyle.Singleton);
container.RegisterSingleton<SmsManagerOptions>(options);
container.Register<ISmsManager, SmsManager>(Lifestyle.Singleton);

Note

I believe the second option is cleaner, but you are free to choose the one you like.