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

最新推荐文章于 2025-08-08 16:37:23 发布

原创最新推荐文章于 2025-08-08 16:37:23 发布 · 2.1k 阅读

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文章标签：

#mvc #asp.net #interface #system #class #工具

本文介绍如何使用ASP.NET MVC3及EF CodeFirst CTP5构建应用程序，并通过创建开销（Expense）实体类来演示CRUD操作。进一步探讨领域实体、服务层和服务接口的实现，以封装业务逻辑。

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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;

   2: using System.Collections.Generic;

   3: using System.Linq;

   4: using System.Text;

   5: using MyFinance.Domain;

   6: using MyFinance.Data.Infrastructure;

7:

   8: namespace MyFinance.Data

   9: {

  10:     public class ExpenseRepository : RepositoryBase<Expense>, IExpenseRepository

  11:         {

  12:         public ExpenseRepository(IDatabaseFactory databaseFactory)

  13:             : base(databaseFactory)

  14:             {

  15:             }

  16:         }

  17:     public interface IExpenseRepository : IRepository<Expense>

  18:     {

  19:     }

  20: }

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;

   2: using System.Collections.Generic;

   3: using System.Linq;

   4: using System.Text;

   5: using MVC3DIApplication.Domain;

   6: using MVC3DIApplication.Data.Infrastructure;

   7: using MVC3DIApplication.Data;

8:

   9: namespace MVC3DIApplication.Service

  10: {

  11:     //接口

  12:      public interface IExpenseService

  13:     {

  14:         IEnumerable
   
     GetExpenses(DateTime startDate, DateTime ednDate);

  15:         Expense GetExpense(int id);

  16:         void CreateExpense(Expense expense);

  17:         void DeleteExpense(int id);

  18:         void SaveExpense();

  19:     }

  20:     //实现接口

  21:     public class ExpenseService : IExpenseService

  22:     {

  23:         private readonly IExpenseRepository expenseRepository;

  24:         private readonly IUnitOfWork unitOfWork;

  25:         public ExpenseService(IExpenseRepository expenseRepository, IUnitOfWork unitOfWork)

  26:         {

  27:             this.expenseRepository = expenseRepository;

  28:             this.unitOfWork = unitOfWork;

  29:         }

  30:         public IEnumerable
   
     GetExpenses(DateTime startDate, DateTime endDate)

  31:         {

  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;

  33:             var expenses = expenseRepository.GetMany(exp => exp.Date >= startDate && exp.Date <= endDate);

  34:             return expenses;

  35:         }

  36:         public void CreateExpense(Expense expense)

  37:         {

  38:             expenseRepository.Add(expense);

  39:             unitOfWork.Commit();

  40:         }

  41:         public Expense GetExpense(int id)

  42:         {

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

  44:             return expense;

  45:         }

  46:         public void DeleteExpense(int id)

  47:         {

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

  49:             expenseRepository.Delete(expense);

  50:             unitOfWork.Commit();

  51:         }

  52:         public void SaveExpense()

  53:         {

  54:             unitOfWork.Commit();

  55:         }

  56:     }

  57: }

58:

59:

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!