Question

How do I pass an object to a constructor argument with Ninject? Assuming the object is register in the container.

Answer 1

Apparently you do not need to explicitly provide Ninject with constructor arguments if the dependent objects are defined in the container. This is unlike Castle.

Here’s an example. IGitRepository depends on IGitAuthor and IGitRepositoryPath. Since the two dependents are bond in my container they are injected ‘magically’. Ninject is smart enough to see that IGitRepository’s constructor takes them. So I just bind IGitRepository and leave off the .withConstructorArgument(s).

 Bind<IGitRepository>().To<GitRepository>();
        Bind<IGitAuthor>().To<GitAuthor>()
            .WithConstructorArgument("author", ConfigurationManager.AppSettings["GitAuthor"])
            .WithConstructorArgument("email", ConfigurationManager.AppSettings["GitEmail"]);
        Bind<IGitRepositoryPath>().To<GitRepositoryPath>()
            .WithConstructorArgument("path",ConfigurationManager.AppSettings["GitServerUri"]);