How to StructureMap configuration?
On AppEngine "Franch" and "English" as a dependency injection what do I do?
class Program
{
static void Main(string[] args)
{
IContainer container = ConfigureDependencies();
IAppEngine appEngine = container.GetInstance<IAppEngine>();
IGeeter g1 = container.GetInstance<IGeeter>("Franch");
IGeeter g2 = container.GetInstance<IGeeter>("English");
appEngine.Run();
}
private static IContainer ConfigureDependencies()
{
return new Container(x =>
{
x.For<IGeeter>().Add<FrenchGreeter>().Named("Franch");
x.For<IGeeter>().Add<EnglishGreeter>().Named("English");
x.For<IAppEngine>().Use<AppEngine>();
开发者_StackOverflow社区 x.For<IGeeter>().Use<EnglishGreeter>();
x.For<IOutputDisplay>().Use<ConsoleOutputDisplay>();
});
}
}
public interface IAppEngine
{
void Run();
}
public interface IGeeter
{
string GetGreeting();
}
public interface IOutputDisplay
{
void Show(string message);
}
public class AppEngine : IAppEngine
{
private readonly IGeeter english;
private readonly IGeeter franch;
private readonly IOutputDisplay outputDisplay;
public AppEngine(IGeeter english,IGeeter franch, IOutputDisplay outputDisplay)
{
this.english = english;
this.franch = franch;
this.outputDisplay = outputDisplay;
}
public void Run()
{
outputDisplay.Show(greeter.GetGreeting());
}
}
public class EnglishGreeter : IGeeter
{
public string GetGreeting()
{
return "Hello";
}
}
public class FrenchGreeter : IGeeter
{
public string GetGreeting()
{
return "Bonjour";
}
}
As the contract for FrenchGreeter and EnglishGreeter is the same, StructureMap will not know which to use. For each wireing it uses only one instance per contract. Try something like this:
For<IGreeter>().Use<FrenchGreeter>().Named("French");
For<IGreeter>().Use<EnglishGreeter>().Named("English");
For<IAppEngine>().Use<AppEngine>()
.Ctor<IGreeter>("French").Is(x => x.TheInstanceNamed("French"))
.Ctor<IGreeter>("English").Is(x => x.TheInstanceNamed("English"));
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