Implementing OnePerSessionBehavior in NInject

Question

I\'d like to create a OnePerSessionBehavior for NInject (v1.0) and I\'ve mostly got it working. The only issue that remains is how to pass in fresh arguments using .WithArgumen

Answer 1

Can you pass a lamda as your argument? For instance, if you have a class like this:

public class Something : ISomething
{
    public Something(Action<DateTime> initializer)
    {
        var now = initializer();
    }
}

You can bind it as follows:

Bind<ISomething>()
    .To<Something>()
    .Using<OnePerSessionBehavior>()
    .WithArgument("initializer", () => { return DateTime.Now; });

Though I don't know you exact situation, another idea would be to create your object without worrying about argument injection, and then set your properties:

kernel.Bind<ISomething>().To<Something>().Using<OnePerSessionBehavior>();    
var mySomething = kernel.Get<Something>();
mySomething.DateCreated = DateTime.Now;

or:

mySomething.Initialize(DateTime.Now);

Would either of those ideas work?

Answer 2

You're passing a value that's evaluated during the definition of the binding. That's why you get the same value over and over again. Actually from the top of my head I don't have an easy answer to that but I'll definitely think about it as it might be useful for testing purposes for me to.