Unity Framework constructor parameters in MVC
- by ubersteve
I have an ASP.NET MVC3 site that I want to be able to use different types of email service, depending on how busy the site is.
Consider the following:
public interface IEmailService
{
void SendEmail(MailMessage mailMessage);
}
public class LocalEmailService : IEmailService
{
public LocalEmailService()
{
// no setup required
}
public void SendEmail(MailMessage mailMessage)
{
// send email via local smtp server, write it to a text file, whatever
}
}
public class BetterEmailService : IEmailService
{
public BetterEmailService (string smtpServer, string portNumber, string username, string password)
{
// initialize the object with the parameters
}
public void SendEmail(MailMessage mailMessage)
{
//actually send the email
}
}
Whilst the site is in development, all of my controllers will send emails via the LocalEmailService; when the site is in production, they will use the BetterEmailService.
My question is twofold:
1) How exactly do I pass the BetterEmailService constructor parameters? Is it something like this (from ~/Bootstrapper.cs):
private static IUnityContainer BuildUnityContainer()
{
var container = new UnityContainer();
container.RegisterType<IEmailService, BetterEmailService>("server name", "port", "username", "password");
return container;
}
2) Is there a better way of doing that - i.e. putting those keys in the web.config or another configuration file so that the site would not need to be recompiled to switch which email service it was using?
Many thanks!
