Autofac Binding at Runtime

Question

I currently use Autofac to do simple constructor injection without any issues. However what I would like to know is how to resolve dependencies at runtime. The example below

Answer 1

You should use a factory:

public interface IExportFactory
{
    IExport CreateNewExport(string type);
}

Implementation:

class ExportFactory : IExportFactory
{
    private readonly IComponentContext container;

    public ExportFactory(IComponentContext container)
    {
        this.container = container;
    }

    public IExport CreateNewExport(string type)
    {
        switch (type)
        {
            case: "html":
                return this.container.Resolve();
            // etc
        }
    }
}

Registration:

builder.Register(
    c=> new ExportFactory(c.Resolve()))));
builder.RegisterType();
builder.RegisterType();

Controller:

public class HomeController : Controller
{
   IExportFactory factory;

   public HomeController(IExportFactory factory)
   {
      this.factory = factory;
   }

   public void ExportDocument(string content)
   {
      this.factory.CreateNew("html").Run(content);
   }
}