Asp.net电子邮件发送已发布但未开发

Question

I am developing an application with asp.net mvc. And I need to send email when an action populated.

public class MyController : Controller{

   public ActionResult Create(string name){

        // create and save to database

        // if success 
        // select admin emails from database.
        // create email content and subject.
        // send email to admins.
   }
}

But I want to automatically activate sending mechanism after published my project. In development, I do not need to send email on Create action.

Is there any setting to do this?

Answer 1

You can use the HttpRequest.IsLocal Property.

public class MyController : Controller
{
   public ActionResult Create(string name)
   {
       if (HttpContext.Current.Request.IsLocal) { ... }
       else { ... }
   }
}

Answer 2

To handle those kind of scenarios you should use Dependency Injection (I personally used it in 99.9% of the projects because this is the only way you can unit test it). Dependency Injection library ( Autofac , Ninject , Castle Windsor , Simple Injector and others) allows you to resolve dependencies in run time base on some configuration. For example you you have a communication service that is responsible to send emails:

public interface ICommuniucationService
{
    void SendEmail(....);
}

public class CommunicationService : ICommuniucationService
{
    public void SendEmail(...)
    {
        //real implementation of sending email
    }
}

public class FakeCommunicationService : ICommuniucationService
{
    public void SendEmail(...)
    { 
       //do nothing.
       return;
    }
}

My controller is going to have a private property of type ICommuniucationService that is going to be instantiated by the dependency injection library via constructor injection:

public class MyController : Controller{

   //this will be resolved in runtime(either CommuniucationService or FakeCommunicationService )
   private readonly ICommuniucationService EmailSvc;

   // Use constructor injection for the dependencies
   public MyController(ICommuniucationService svc) {
       this.EmailSvc= svc;       
   }

   public ActionResult Create(string name){

        // create and save to database

        // if success 
        // select admin emails from database.
        // create email content and subject.

        this.EmailSvc.SendEmail(...)

        //The action code doesn't change neither for 
   }
}

When configuring dependency injection container you could do something like this ( Simple injector example similar to this ):

protected void Application_Start(object sender, EventArgs e) {       
    var container = new Container();  
#if DEBUG
   container.Register<ICommuniucationService, FakeCommuniucationService>(Lifestyle.Singleton); 
#else
   container.Register<ICommuniucationService, CommuniucationService>(Lifestyle.Singleton); 
#endif         

    container.Verify();
    DependencyResolver.SetResolver(new SimpleInjectorDependencyResolver(container));
}

So with this configuration when your project runs with DEBUG mode you are registering FakeCommuniucationService which doesn't send emails, while when you run in RELEASE mode (that you should use when you publish your application) real CommuniucationService is registered