构造与Ninject多个参数 [英] Constructor with multiple arguments with Ninject

问题描述

我特林使用 Ninject 作为IoC容器，但不能了解如何创建有超过一类的一个实例1参数构造函数。基本上我有一个PCL库中用于身份验证的服务接口和其在该构造函数接收cosumer键，秘密和baseAddress一个WP8项目实施：

I am tring to use Ninject as a IoC container but could not understand how to create an instance of a class that has more than 1 parameter in the constructor. Basically I have a service interface for authentication in a PCL library and its implementation in a WP8 project that receives in the constructor the cosumer key, secret and baseAddress:

//On PCL project
public interface IAuthorizationService {
 bool Authenticate();
}

//On WP8 Project
pubilc class MyAuthenticator : IAuthorizationService {
 public MyAuthenticator(string consumerKey, string consumerSecret, string baseAddress) { ... }
 public bool Authenticate() { ... }
}

现在我需要配置 Ninject 模块，这样我就可以得到IAuthorizationService的一个实例。
。如果我的班有没有构造函数，我会做：

Now I need to configure Ninject module so I can get an instance of IAuthorizationService. If my class had no constructors I would do:

internal class Module : NinjectModule {
 public override void Load() {
  this.Bind<IAuthorizationService>().To<MyAuthenticator>();
 }
}

如果它的构造固定值，我会做

If it had fixed values for the constructor I would do:

internal class Module : NinjectModule {
 public override void Load() {
  this.Bind<IAuthorizationService>().To<MyAuthenticator>().WithConstructorArgument( */* fixed argument here*/* );
 }
}

和获得一个实例 Module.Get< IAuthorizationService>（）

但是，如果构造函数的参数不能在编译时解决？如何通过paramenters？绑定代码应该如何？

的编辑，以claryfy的问题。的

推荐答案

这很容易。不管有多少构造函数的参数，结合保持不变。

It's very easy. No matter how many constructor arguments, the binding stays the same:

Bind<IAuthorizationService>().To<MyAuthenticator>();

比方说， MyAuthenticator 有一个构造一个类型参数的IFoo 。
你所要做的就是告诉ninject它如何解决/创建一个的IFoo 。再次，很简单：

Let's say MyAuthenticator had a constructor with one parameter of type IFoo. All you got to do is tell ninject how it can resolve/create an IFoo. Again, very simple:

Bind<IFoo>().To<Foo>();

您不需要 WithConstructorArgument 如初， 除的情况下的要覆盖ninject的默认行为。比方说， MyAuthenticator 有类型的参数的IFoo 加上另一个参数字符串种子。所有你需要的是：

You don't need WithConstructorArgument ever, except in case you want to override the default behavior of ninject. Let's say MyAuthenticator has a parameter of type IFoo plus another parameter string seed which you want to configure specifically. All you'd need is:

Bind<IFoo>().To<Foo>();
Bind<IAuthorizationService>().To<MyAuthenticator>()
    .WithConstructorArgument("seed", "initialSeedValue");

无需指定的值的IFoo 参数！

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