[英]Find class that implements generic interface with Ninject
With Ninject you can register a binding like this: 使用Ninject,您可以注册如下绑定:
Bind(typeof(IQueryHandler<,>)).To(typeof(QueryHandler<,>));
But in my case I don't know the name of the actual class. 但就我而言,我不知道实际班级的名称。 All i know is that it implements a certain interface.
我所知道的是它实现了特定的接口。
So for example, suppose I have the following: 因此,例如,假设我有以下内容:
public class CreatePageQueryHandler : IQueryHandler<CreatePage, string>
{
public string Retrieve(CreatePage query)
{ ... }
}
There will be only one class that implements the interface with these gerenic params: IQueryHandler<CreatePage, string>
将只有一个类使用这些gerenic参数实现该接口:
IQueryHandler<CreatePage, string>
Is there a way with Ninject to dynamically get an instance of the class? Ninject有没有办法动态获取类的实例? Something like:
就像是:
kernel.Get<IQueryHandler<CreatePage, string>>(); // returns instance of: CreatePageQueryHandler
Please note: 请注意:
I don't want to manually bind
this in the RegisterServices
method. 我不想在
RegisterServices
方法中手动bind
它。 I'm looking for a dynamic way to get the instance of the class. 我正在寻找一种获取类实例的动态方法。
Ninject contains a batch-registration API. Ninject包含一个批次注册API。 You can use the following binding for instance:
例如,您可以使用以下绑定:
kernel.Bind(
x => x.FromAssembliesMatching("Fully.Qualified.AssemblyName*")
.SelectAllClasses()
.InheritedFrom(typeof(IQueryHandler<,>))
.BindBase()
);
With this Code you will get all types which implements IQueryHandler. 通过此代码,您将获得实现IQueryHandler的所有类型。
var types = AppDomain.CurrentDomain.GetAssemblies()
.SelectMany(s => s.GetTypes())
.Where(p => typeof(IQueryHandler).IsAssignableFrom(p));
After that you can register the types in Ninject or you can manually create a Instance from one of the Type: 之后,您可以在Ninject中注册类型,也可以从以下类型之一手动创建实例:
var instance = (IQueryHandler)Activator.CreateInstance(types.First());
I did not test this Code, on .Net Core there is a different way to get all types from an assembly 我没有测试此代码,在.Net Core上,有一种从装配中获取所有类型的方法
I think you need Ninject convention extensions. 我认为您需要Ninject约定扩展。
See https://github.com/ninject/Ninject.Extensions.Conventions 参见https://github.com/ninject/Ninject.Extensions.Conventions
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