我有一个ASP.NET MVC 4应用程序,我想实现工作单元模式.
在我的Web项目中,我有：
IocConfig.cs
using System.Web.Http;
using NinjectMVC.Data;
using NinjectMVC.Data.Contracts;
using Ninject;
namespace NinjectMVC
{
public class IocConfig
{
public static void RegisterIoc(HttpConfiguration config)
{
var kernel = new StandardKernel(); // Ninject IoC
// These registrations are "per instance request".
// See http://blog.bobcravens.com/2010/03/ninject-life-cycle-management-or-scoping/
kernel.Bind<RepositoryFactories>().To<RepositoryFactories>()
.InSingletonScope();
kernel.Bind<IRepositoryProvider>().To<RepositoryProvider>();
kernel.Bind<INinjectMVCUow>().To<NinjectMVCUow>();
// Tell WebApi how to use our Ninject IoC
config.DependencyResolver = new NinjectDependencyResolver(kernel);
}
}
}
Global.asax中
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
namespace NinjectMVC
{
// Note: For instructions on enabling IIS6 or IIS7 classic mode,// visit http://go.microsoft.com/?LinkId=9394801
public class MvcApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
// Tell WebApi to use our custom Ioc (Ninject)
IocConfig.RegisterIoc(GlobalConfiguration.Configuration);
WebApiConfig.Register(GlobalConfiguration.Configuration);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
AuthConfig.RegisterAuth();
}
}
}
PersonsController.cs
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using NinjectMVC.Data.Contracts;
using NinjectMVC.Model;
namespace NinjectMVC.Controllers
{
public class PersonsController : ApiControllerBase
{
public PersonsController(INinjectMVCUow uow)
{
Uow = uow;
}
#region OData Future: IQueryable<T>
//[Queryable]
// public IQueryable<Person> Get()
#endregion
// GET /api/persons
public IEnumerable<Person> Get()
{
return Uow.Persons.GetAll()
.OrderBy(p => p.FirstName);
}
// GET /api/persons/5
public Person Get(int id)
{
var person = Uow.Persons.GetById(id);
if (person != null) return person;
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
}
// OData: GET /api/persons/?firstname=\'Hans\''
// With OData query Syntax we would not need such methods
// /api/persons/getbyfirstname?value=Joe1
[ActionName("getbyfirstname")]
public Person GetByFirstName(string value)
{
var person = Uow.Persons.GetAll()
.FirstOrDefault(p => p.FirstName.StartsWith(value));
if (person != null) return person;
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
}
// Update an existing person
// PUT /api/persons/
public HttpResponseMessage Put(Person person)
{
Uow.Persons.Update(person);
Uow.Commit();
return new HttpResponseMessage(HttpStatusCode.NoContent);
}
}
}
当我尝试冲浪时：http://www.domain.com/Persons/Get我得到：
没有为此对象定义无参数构造函数.
有没有我错过的东西？我将不胜感激任何帮助.
这是项目的zip文件,以便更好地参考：
解决方法
Wep.API使用与MVC框架不同的IDependencyResolver.
当您使用HttpConfiguration.DependencyResolver时,它仅适用于ApiControllers.但你的ApiControllerBase派生自Controller …
所以你的ApiControllerBase应该继承自ApiController.
在ApiBaseController.cs中更改它：
public abstract class ApiControllerBase : ApiController
{
}
如果要将依赖项注入常规Controller派生类,则需要使用(在IocConfig中)：
System.Web.Mvc.DependencyResolver.SetResolver(new NinjectMvcDependencyResolver(container));
请注意,在这种情况下,您无法使用NinjectDependencyResolver,因为它适用于ApiControllers.
所以你需要一个不同的NinjectMvcDependencyResolver,它应该实现System.Web.Mvc.IDependencyResolver.
public class NinjectMvcDependencyResolver: NinjectDependencyScope,System.Web.Mvc.IDependencyResolver
{
private IKernel kernel;
public NinjectDependencyResolver(IKernel kernel)
: base(kernel)
{
this.kernel = kernel;
}
}
