使用MVC4，Ninject，EF，Moq，构建一个真实的应用电子商务SportsStore(九)

实在不好意思，好久没有更新了，我不想找些客观原因来解释，只想请大家见谅！现在我们继续我们的项目，客户已经完成了订单的确认，但我们还没有一个地方可以让客户输入他们的收货信息，我们的商品没办法发货，这是个严重的问题，我们必须解决它。现在，我们就在SportsStore.Domain工程的Entities文件夹中添加一个ShippingDetails类，在这个类中，我们使用了System.ComponentModel.DataAnnotations命名空间，去验证客户的输入：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ComponentModel.DataAnnotations;

namespace SportsStore.Domain.Entities
{
    public class ShippingDetails
    {
        [Required(ErrorMessage = "Please enter a name")]
        public string Name { get; set; }
        [Required(ErrorMessage = "Please enter the first address line")]
        public string Line1 { get; set; }         public string Line2 { get; set; }         public string Line3 { get; set; }
        [Required(ErrorMessage = "Please enter a city name")]
        public string City { get; set; }
        [Required(ErrorMessage = "Please enter a state name")]
        public string State { get; set; }
        public string Zip { get; set; }
        [Required(ErrorMessage = "Please enter a country name")]
        public string Country { get; set; }
        public bool GiftWrap { get; set; }
    } 
}

我们的目的是让用户输入收货的详细信息后能够去付款，毕竟要赚钱吗，这个没啥不好意思的，我们这就去修改一下我们的summary视图，打开Views/Cart/Index.cshtml文件，我们要在这添加一个支付按钮，修改文件的最后部分像下面的样子，然后，运行一下你的代码，看看效果:)

</table> <p align="center" class="actionButtons">
         <a href="@Model.ReturnUrl">继续购物</a>
         @Html.ActionLink("支付", "Checkout") </p>

正如你所预见的，现在我们要为CartController类添加一个Checkout Action方法：

public ViewResult Checkout() { 
            return View(new ShippingDetails()); 
        }

Checkout方法返回一个默认的view，并传递一个new ShippingDetails对象作为view model. 现在我们就去创建一个ShippingDetails类型的强视图：

修改视图代码如下：

@model SportsStore.Domain.Entities.ShippingDetails  
@{     ViewBag.Title = "SportStore: Checkout"; }  
<h2>现在支付</h2> 
请输入你的详细信息, 我们会根据您的信息发货! 
@using (Html.BeginForm()) {    
                                                                                            
                           <h3>发货到</h3>     
    <div>姓名: @Html.EditorFor(x => x.Name)</div>  
    <h3>地址</h3>    
     <div>Line 1: @Html.EditorFor(x => x.Line1)</div> 
        <div>Line 2: @Html.EditorFor(x => x.Line2)</div> 
    <div>Line 3: @Html.EditorFor(x => x.Line3)</div>     
    <div>城市: @Html.EditorFor(x => x.City)</div>    
     <div>区: @Html.EditorFor(x => x.State)</div>   
      <div>邮编: @Html.EditorFor(x => x.Zip)</div>    
     <div>国家: @Html.EditorFor(x => x.Country)</div>  
    <h3>可选项</h3>    
     <label>         
         @Html.EditorFor(x => x.GiftWrap)         作为礼品包装我的商品    

     </label>             
     <p align="center">        
          <input class="actionButtons" type="submit" value="完成订单" />    

     </p>
}

实现订单处理器

我们需要一个组件，通过这个组件，我们能够容易的把握订单的处理流程，为了保持遵守MVC模型的基本原则，我们要定义一个接口，写一个这个接口的实现类，使我们的DI容器和 Ninject和这个实现类整合在一起.
添加一个IOrderProcessor接口到SportsStore.Domain工程的Abstract文件夹：

using SportsStore.Domain.Entities;
namespace SportsStore.Domain.Abstract
{
    public interface IOrderProcessor
    {
        void ProcessOrder(Cart cart, ShippingDetails shippingDetails);
    }
}

实现接口

IOrderProcessor接口的实现类将通过发送额email给管理员处理订单，当然了，我们简化了这个流程，真正的大型商务网站不只是发邮件这么简单！ 现在我们要创建一个新类，叫做 EmailOrderProcessor，把它放在SportsStore.Domain工程的Concrete文件夹中，这个类我们使用.NET Framework library内建的SMTP去发送邮件：

using System.Net.Mail; 
using System.Text;
using SportsStore.Domain.Abstract; 
using SportsStore.Domain.Entities; 
using System.Net;  

namespace SportsStore.Domain.Concrete {  
    public class EmailSettings {        
        public string MailToAddress = "orders@example.com";    
        public string MailFromAddress = "sportsstore@example.com";  
        public bool UseSsl = true;   
        public string Username = "MySmtpUsername";   
        public string Password = "MySmtpPassword";    
        public string ServerName = "smtp.example.com"; 
        public int ServerPort = 587;      
        public bool WriteAsFile = false;   
        public string FileLocation = @"c:sports_store_emails";   
    }  

    public class EmailOrderProcessor :IOrderProcessor {   
  
        private EmailSettings emailSettings;  

        public EmailOrderProcessor(EmailSettings settings) 
        { 
            emailSettings = settings;      
        }  

        public void ProcessOrder(Cart cart, ShippingDetails shippingInfo) 
        { 
 
            using (var smtpClient = new SmtpClient()) 
            {  
                smtpClient.EnableSsl = emailSettings.UseSsl;  
                smtpClient.Host = emailSettings.ServerName;    
                smtpClient.Port = emailSettings.ServerPort;  
                smtpClient.UseDefaultCredentials = false;       
                smtpClient.Credentials = new NetworkCredential(emailSettings.Username, emailSettings.Password);  

                if (emailSettings.WriteAsFile) {     
                    smtpClient.DeliveryMethod  = SmtpDeliveryMethod.SpecifiedPickupDirectory; 
                    smtpClient.PickupDirectoryLocation = emailSettings.FileLocation;     
                    smtpClient.EnableSsl = false;   
                }  
                StringBuilder body = new StringBuilder().AppendLine("A new order has been submitted")
                    .AppendLine("---").AppendLine("Items:");  

                foreach (var line in cart.Lines) { 
                     var subtotal = line.Product.Price * line.Quantity;  
                    body.AppendFormat("{0} x {1} (subtotal: {2:c}", line.Quantity, line.Product.Name, subtotal);                 }  
                body.AppendFormat("Total order value: {0:c}", cart.ComputeTotalValue()).AppendLine("---")
                    .AppendLine("Ship to:").AppendLine(shippingInfo.Name).AppendLine(shippingInfo.Line1)
                    .AppendLine(shippingInfo.Line2 ?? "") .AppendLine(shippingInfo.Line3 ?? "")
                    .AppendLine(shippingInfo.City).AppendLine(shippingInfo.State ?? "")
                    .AppendLine(shippingInfo.Country) .AppendLine(shippingInfo.Zip).AppendLine("---")
                    .AppendFormat("Gift wrap: {0}",shippingInfo.GiftWrap ? "Yes" : "No");  

                MailMessage mailMessage = new MailMessage(emailSettings.MailFromAddress,   // From  
                    emailSettings.MailToAddress,     // To 
                    "New order submitted!",          // Subject   
                    body.ToString());                // Body  

                if (emailSettings.WriteAsFile)
                { 
                    mailMessage.BodyEncoding = Encoding.ASCII;
                }  
                smtpClient.Send(mailMessage);             
            }        
        }
    }
}

注册实现类

为了让Ninject能够创建 IOrderProcessor接口的实现类,我们必须添加一些代码到SportsStore.WebUI 工程的NinjectControllerFactory 类的AddBindings 方法，到这个方法里添加代码，不用我说你也知道要干什么事了，马上动手吧！

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using SportsStore.Domain.Abstract;
using SportsStore.Domain.Entities;
using Moq;
using Ninject;
using SportsStore.Domain.Concrete;
using System.Configuration; 

namespace SportsStore.WebUI.Infrastructure
{
    public class NinjectControllerFactory: DefaultControllerFactory
    {

            private IKernel ninjectKernel;

            public NinjectControllerFactory() {
                ninjectKernel = new StandardKernel();
                AddBindings();
            }

            protected override IController GetControllerInstance(RequestContext
                requestContext, Type controllerType) {

                return controllerType == null ? null : (IController)ninjectKernel.Get(controllerType);
            }

            private void AddBindings() {

                Mock<IProductsRepository> mock = new Mock<IProductsRepository>();

                //mock.Setup(m => m.Products).Returns(new List<Product> {
                //    new Product { Name = "Football", Price = 25 },
                //    new Product { Name = "Surf board", Price = 179 },
                //    new Product { Name = "Running shoes", Price = 95 }
                //}.AsQueryable());
                //ninjectKernel.Bind<IProductsRepository>().ToConstant(mock.Object);
                ninjectKernel.Bind<IProductsRepository>().To<EFProductRepository>();

                EmailSettings emailSettings = new EmailSettings {
                    WriteAsFile = bool.Parse(ConfigurationManager.AppSettings["Email.WriteAsFile"] ?? "false") };
                ninjectKernel.Bind<IOrderProcessor>().To<EmailOrderProcessor>().WithConstructorArgument("settings", emailSettings); 
            }
         }
    }

我们创建了一个EmailSettings 对象, 当一个服务请求要求创建一个新的IOrderProcessor 接口实力的时候，我们使用Ninject的WithConstructorArgument 方法注入它到EmailOrderProcessor构造函数，因为我们使用了ConfigurationManager.AppSettings 属性去访问 Web.config文件，所以，我们要将一些配置添加到Web.config 文件中：

<appSettings>
    <add key="webpages:Version" value="2.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="PreserveLoginUrl" value="true" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
    <add key="Email.WriteAsFile" value="true"/>
  </appSettings>

完善Cart Controller
我们要修改CartController类，让它的构造函数去要求一个IOrderProcessor接口的实现，并添加一个新的方法处理用户点击完成订单按钮时，post过来的Http请求：

        private IOrderProcessor orderProcessor;

        public CartController(IProductsRepository repo, IOrderProcessor proc)
        {
            repository = repo; orderProcessor = proc;
        }

        [HttpPost]
        public ViewResult Checkout(Cart cart, ShippingDetails shippingDetails)
        {
            if (cart.Lines.Count() == 0)
            { 
                ModelState.AddModelError("", "Sorry, your cart is empty!"); 
            }

            if (ModelState.IsValid) {
                orderProcessor.ProcessOrder(cart, shippingDetails); 
                cart.Clear(); return View("Completed"); 
            }
            else 
            { 
                return View(shippingDetails);
            }
        }

你现在看到了，我们添加的Checkout方法带有一个HttpPost 属性,这意味着它将为一个post请求调用，当用户提交一个表单时，我们将依赖MVC的model binder system, ShippingDetails 参数和Cart 参数创建我们的model binder。

为了展示用户的输入错误，我们需要在Checkout view中添加 @Html.ValidationSummary() 标记，看起来应该像下面的样子：

<h2>现在支付</h2> 
请输入你的详细信息, 我们会根据您的信息发货! 
@using (Html.BeginForm()) {   
     @Html.ValidationSummary()  
     <h3>发货到</h3>

     ……

展示Summary页
为了完善支付流程, 我们应该显示一个订单已经被处理的确认页给用户，右击CartController类的任意方法去添加一个视图，命名为Completed，这个视图我们不需要定义为强类型：

@{     ViewBag.Title = "SportsStore: Order Submitted"; }  
<h2>谢谢!</h2>
 感谢您购买我们的商品. 我们将尽可能快的发送货物给您.

运行你的程序前，别忘了修改你的email账户和密码，还有C盘下要建一个c:sports_store_emails文件夹哦！在下一篇中，我们将为我们的网站创建一个CRUD的管理后台，这是所有网站都比不可少的功能，我们当然也不会少了！感谢您的关注！如果有任何问题请在我的博客上留言，我会尽可能详尽的为您解答，下篇再见！