在ASP.NET Web API和ASP.NET Web MVC中使用Ninject

一、准备工作

1、新建一个名为MvcDemo的空解决方案

2、新建一个名为MvcDemo.WebUI的空MVC应用程序

3、使用NuGet安装Ninject库

二、在ASP.NET MVC中使用Ninject

1、新建一个Product实体类，代码如下：

public class Product

    {

        public int ProductId { get; set ; }

        public string Name { get; set ; }

        public string Description { get; set ; }

        public decimal Price { get; set ; }

        public string Category { set; get ; }

    }

2、添加一个IProductRepository接口及实现

public interface IProductRepository

    {

        IQueryable <Product > Products { get; }

        IQueryable <Product > GetProducts();

        Product GetProduct();

        bool AddProduct(Product product);

        bool UpdateProduct(Product product);

        bool DeleteProduct(int productId);

    }

public class ProductRepository : IProductRepository

    {

        private List < Product> list;

        public IQueryable < Product> Products

        {

            get { return GetProducts(); }

        }

        public IQueryable < Product> GetProducts()

        {

            list = new List < Product>

            {

                new Product {ProductId = ,Name = "苹果",Category = "水果" ,Price = },

                new Product {ProductId = ,Name = "鼠标",Category = "电脑配件" ,Price = },

                new Product {ProductId = ,Name = "洗发水",Category = "日用品" ,Price = }

            };

            return list.AsQueryable();

        }

        public Product GetProductById( int productId)

        {

            return Products.FirstOrDefault(p => p.ProductId == productId);

        }

        public bool AddProduct( Product product)

        {

            if (product != null )

            {

                list.Add(product);

                return true ;

            }

            return false ;

        }

        public bool UpdateProduct( Product product)

        {

            if (product != null )

            {

                if (DeleteProduct(product.ProductId))

                {

                    AddProduct(product);

                    return true ;

                }

            }

            return false ;

        }

        public bool DeleteProduct( int productId)

        {

            var product = GetProductById(productId);

            if (product != null )

            {

                list.Remove(product);

                return true ;

            }

            return false ;

        }

    }

3、添加一个实现了IDependencyResolver接口的Ninject依赖解析器类

public class NinjectDependencyResolverForMvc : IDependencyResolver

    {

        private IKernel kernel;

        public NinjectDependencyResolverForMvc( IKernel kernel)

        {

            if (kernel == null )

            {

                throw new ArgumentNullException( "kernel" );

            }

            this .kernel = kernel;

        }

        public object GetService( Type serviceType)

        {

            return kernel.TryGet(serviceType);

        }

        public IEnumerable < object> GetServices( Type serviceType)

        {

            return kernel.GetAll(serviceType);

        }

    }

4、添加一个NinjectRegister类，用来为MVC和WebApi注册Ninject容器

public class NinjectRegister

    {

        private static readonly IKernel Kernel;

        static NinjectRegister()

        {

            Kernel= new StandardKernel ();

            AddBindings();

        }

        public static void RegisterFovMvc()

        {

            DependencyResolver .SetResolver(new NinjectDependencyResolverForMvc (Kernel));

        }

        private static void AddBindings()

        {

            Kernel.Bind<IProductRepository >().To< ProductRepository>();

        }

    }

5、在Global.asax文件的Application_Start方法中添加下面代码：

NinjectRegister .RegisterFovMvc(); //为ASP.NET MVC注册IOC容器

6、新建一个名为ProductController的控制器，ProductController的构造函数接受了一个IProductRepository参数，当ProductController 被实例化的时候，Ninject就为其注入了ProductRepository的依赖.

public class ProductController : Controller

    {

        private IProductRepository repository;

        public ProductController(IProductRepository repository)

        {

            this .repository = repository;

        }

        public ActionResult Index()

        {

            return View(repository.Products);

        }

    }

7、视图代码用来展示商品列表

@model IQueryable<MvcDemo.WebUI.Models. Product >

@{

    ViewBag.Title = "MvcDemo Index" ;

}

@ foreach ( var product in Model)

{

    <div style=" border-bottom :1px dashed silver ;">

        < h3> @product.Name </ h3>

        < p> 价格：@ product.Price </ p >

    </div >

}

8、运行效果如下：

三、在ASP.NET Web Api中使用Ninject

1、添加一个实现了IDependencyResolver接口的Ninject依赖解析器类

namespace MvcDemo.WebUI.AppCode

{

    public class NinjectDependencyResolverForWebApi : NinjectDependencyScope ,IDependencyResolver

    {

        private IKernel kernel;

        public NinjectDependencyResolverForWebApi( IKernel kernel)

            : base (kernel)

        {

            if (kernel == null )

            {

                throw new ArgumentNullException( "kernel" );

            }

            this .kernel = kernel;

        }

        public IDependencyScope BeginScope()

        {

            return new NinjectDependencyScope(kernel);

        }

    }

    public class NinjectDependencyScope : IDependencyScope

    {

        private IResolutionRoot resolver;

        internal NinjectDependencyScope(IResolutionRoot resolver)

        {

            Contract .Assert(resolver != null );

            this .resolver = resolver;

        }

        public void Dispose()

        {

            resolver = null ;

        }

        public object GetService( Type serviceType)

        {

            return resolver.TryGet(serviceType);

        }

        public IEnumerable < object> GetServices( Type serviceType)

        {

            return resolver.GetAll(serviceType);

        }

    }

}

2、在NinjectRegister类中添加注册依赖解析器的方法

public static void RegisterFovWebApi( HttpConfiguration config)

        {

            config.DependencyResolver = new NinjectDependencyResolverForWebApi (Kernel);

        }

3、在Global.asax文件的Application_Start方法中添加下面代码：

NinjectRegister .RegisterFovWebApi( GlobalConfiguration.Configuration); //为WebApi注册IOC容器

4、新建一个名为MyApiController的控制器

public class MyApiController : ApiController

    {

        private IProductRepository repository;

        public MyApiController(IProductRepository repository)

        {

            this .repository = repository;

        }

        // GET api/MyApi

        [ HttpGet ]

        public IEnumerable < Product> Get()

        {

            return repository.Products;

        }

        // GET api/MyApi/5

        [ HttpGet ]

        public Product Get( int id)

        {

            return repository.Products.FirstOrDefault(p => p.ProductId == id);

        }

    }

5、视图代码用来展示商品列表

@{

    ViewBag.Title = "ApiDemo Index" ;

}

< script>

    function GetAll() {

        $.ajax({

            url: "/api/MyApi" ,

            type: "GET" ,

            dataType: "json" ,

            success: function (data) {

                for (var i = ; i < data.length; i++) {

                    $( "#list" ).append("<h3>" + data[i].Name + "</h3>");

                    $( "#list" ).append("<p>价格：" +data[i].Price + "</p>");

                }

            }

        });

    }

    $( function () {

        GetAll();

    });

</ script>

< h2> Api Ninject Demo </h2 >

< div id="list" style=" border-bottom :1px dashed silver ;"></ div >

6、运行效果如下：

至此，我们就实现了共用一个NinjectRegister类完成了为MVC和Web Api注册Ninject容器

巴特西

在ASP.NET Web API和ASP.NET Web MVC中使用Ninject

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