我对ASP很陌生。. NET WebApi项目,但希望我能把一切都弄清楚。在创建了几个CRUD控制器之后,我想到了一个绝妙的主意——为所有这些控制器编写通用的基础CRUD-web- api控制器,不要重写相同的代码。在成功实现了这样的类之后,我遇到了依赖解析的问题,它对于非泛型/继承的控制器仍然工作得很好。
简单的请求(GET, POST等)给出:
Type 'UsersController' does not have a default constructor","ExceptionType":"System.ArgumentException"
public abstract class BaseCRUDController<T> : ApiController where T : class, IClientEntity
{
private readonly Repository<T> _repo;
private readonly IDbContextDataProvider _context;
// With this ctor everything works well
public BaseCRUDController()
{
this._context = new ModelContext();
this._repo = new Repository<T>(this._context);
}
// Injection is not working ((
public BaseCRUDController(IDbContextDataProvider context)
{
this._context = context;
this._repo = new Repository<T>(context);
}
和User
实体的具体Controller
:
public class UsersController : BaseCRUDController<User>
{
UsersController(IDbContextDataProvider context) : base(context) { }
UsersController() : base() { }
}
和Ninject配置本身:
public class DataProviderModule : NinjectModule
{
public override void Load()
{
this.Bind<IDbContextDataProvider>().To<ModelContext>().InSingletonScope();
}
}
public class NinjectResolver
{
// Instantinate Ninject dependencies resolver
public static System.Web.Http.Dependencies.IDependencyResolver GetConfiguredDependencyResolver()
{
IKernel kernel = new StandardKernel(new DataProviderModule());
System.Web.Http.Dependencies.IDependencyResolver njResolver = new NinjectResolver(kernel);
return njResolver;
}
}
和Application_Start
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
var config = GlobalConfiguration.Configuration;
config.DependencyResolver = NinjectResolver.GetConfiguredDependencyResolver();
WebApiConfig.Register(config);
我在这里做错了什么?
注意:如果我有:
public class UsersController : ApiController
{
UsersController(IDbContextDataProvider context)
{
....
}
...
哦…我花了几个小时尝试不同的方法。这太疯狂了。这里有趣的部分是Ninject
工作良好,代码是正确的,除了一个可访问性修饰符。添加public
修饰符到UsersController
修饰符修复了这个问题。
public class UsersController : BaseCRUDController<User>
{
public UsersController(IDbContextDataProvider context) : base(context) { }
...
p。