一步一步学习ASP.NET MVC3 &EF Code First CTP 5&DI(二)

一,摘要

在上一篇文章(http://blog.youkuaiyun.com/suzhi921/archive/2011/02/16/6188768.aspx)中,我们讨论了如何应用MVC3以及Code First建立应用程序,以及应用域实体创建了CRUD的操作,在本篇文章我们将更进一步讨论领域实体,服务层,以及View Models,完成我们Web应用程序剩余的部分.使用的工具如下:

1.ASP.NET MVC 3
2.EF Code First CTP5
3.Unity2.0

二,创建Expense类的Repository

由于所有的CRUD操作封装在Base类里,所以只需继承基类就可以完成CRUD操作:
ExpenseRepository.cs:

   1: using System;

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   2: using System.Collections.Generic;

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   3: using System.Linq;

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   4: using System.Text;

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   5: using MyFinance.Domain;

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   6: using MyFinance.Data.Infrastructure;

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   7: 

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   8: namespace MyFinance.Data

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   9: {

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  10:     public class ExpenseRepository : RepositoryBaseExpense>, IExpenseRepository

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  11:         {

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  12:         public ExpenseRepository(IDatabaseFactory databaseFactory)

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  13:             : base(databaseFactory)

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  14:             {

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  15:             }           

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  16:         }

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  17:     public interface IExpenseRepository : IRepositoryExpense>

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  18:     {

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  19:     }

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  20: }

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三,建立服务层

由于控制器不适合进行大量的业务逻辑处理,所以服务层封装所有的业务逻辑,进行调用即可.下面创建Expense的服务层:

   1: using System;

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   2: using System.Collections.Generic;

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   3: using System.Linq;

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   4: using System.Text;

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   5: using MVC3DIApplication.Domain;

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   6: using MVC3DIApplication.Data.Infrastructure;

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   7: using MVC3DIApplication.Data;

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   8: 

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   9: namespace MVC3DIApplication.Service

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  10: {

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  11:     //接口

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  12:      public interface IExpenseService

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  13:     {

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  14:         IEnumerable<expense> GetExpenses(DateTime startDate, DateTime ednDate);</expense>

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  15:         Expense GetExpense(int id);        

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  16:         void CreateExpense(Expense expense);

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  17:         void DeleteExpense(int id);

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  18:         void SaveExpense();

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  19:     }

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  20:     //实现接口

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  21:     public class ExpenseService : IExpenseService

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  22:     {

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  23:         private readonly IExpenseRepository expenseRepository;       

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  24:         private readonly IUnitOfWork unitOfWork;

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  25:         public ExpenseService(IExpenseRepository expenseRepository, IUnitOfWork unitOfWork)

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  26:         {         

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  27:             this.expenseRepository = expenseRepository;

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  28:             this.unitOfWork = unitOfWork;

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  29:         }

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  30:         public IEnumerable<expense> GetExpenses(DateTime startDate, DateTime endDate)</expense>

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  31:         {

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  32:             //由于进行了依赖注入,所以不需要手动new,直接使用上面expenseRepository调用即可;

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  33:             var expenses = expenseRepository.GetMany(exp => exp.Date >= startDate && exp.Date 
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  34:             return expenses;

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  35:         }

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  36:         public void CreateExpense(Expense expense)

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  37:         {

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  38:             expenseRepository.Add(expense);

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  39:             unitOfWork.Commit();

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  40:         }

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  41:         public Expense GetExpense(int id)

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  42:         {

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  43:             var expense = expenseRepository.GetById(id);

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  44:             return expense;

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  45:         }

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  46:         public void DeleteExpense(int id)

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  47:         {

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  48:             var expense = expenseRepository.GetById(id);

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  49:             expenseRepository.Delete(expense);

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  50:             unitOfWork.Commit();

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  51:         }

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  52:         public void SaveExpense()

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  53:         {

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  54:             unitOfWork.Commit();

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  55:         }

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  56:     }

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  57: }

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  58: 

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  59: 

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四,总结

通过这两篇文章我相信读者朋友能过掌握该结构的使用,由于时间关系我就要把要点写了下,源代码稍后以留言的形式提供,谢谢您的访问!