从零开始，搭建博客系统MVC5+EF6搭建框架（1），EF Code frist、实现泛型数据仓储以及业务逻辑

前言

从上篇30岁找份程序员的工作（伪程序员的独白），文章开始，我说过我要用我自学的技术，来搭建一个博客系统，也希望大家给点意见，另外我很感谢博客园的各位朋友们，对我那篇算是自我阶段总结文章的评论，在里面能看出有很多种声音，有支持的我的朋友给我加油打气，有分享自己工作经历的朋友，有提出忠肯意见的朋友，有对记事本写代码吐槽的朋友，也有希望让我换个行业的，觉得我可能不适合这个行业朋友，不管怎样，我都接受，都是大家同行的一些忠告，谢谢大家。

首先我要在这里感谢很多博客园里面的大牛，写了很多系列，很多学习资料，让我受益很多，有机会找个时间，我会把我浏览器中收藏的资源都整理出来，分享给大家，其实我会的这些都是自己在博客园看到的文章、在某宝买的视频、QQ群里看群主的分享公开课学的，希望大家多提宝贵意见。

一、框架搭建

首先创建几个文件夹：

01Data用来放链接数据的EF以及创建表的类；

02Core存放数据仓储一些跟数据库链接实现数据操作的部分：

03Services 用于存放业务逻辑处理；

04Common用于放公共应用的工具之类；

05UI mvc页面展示的就放在这里以及web相关的核心代码

其中除了Wchl.CRM.WebUI创建的是MVC5应用程序，其他的都是创建类库

二、创建数据库

1.创建一个空的EF code frist环境，输入的名字为WMBlogDB

2、选择空的Code Frist模型

3、创建一个models文件存放所有表的类，这里先创建一个用户信息表的类sysUserInfo

sysUserInfo类：

  1 namespace Wchl.WMBlog.Model.Models
  2 {
  3      public class sysUserInfo
  4     {
  5         /// <summary>
  6         /// 用户ID
  7         /// </summary>
  8         public int uID { get; set; }
  9         /// <summary>
 10         /// 登录账号
 11         /// </summary>
 12         public string uLoginName { get; set; }
 13         /// <summary>
 14         /// 登录密码
 15         /// </summary>
 16         public string uLoginPWD { get; set; }
 17         /// <summary>
 18         /// 真实姓名
 19         /// </summary>
 20         public string uRealName { get; set; }
 21         /// <summary>
 22         /// 状态
 23         /// </summary>
 24         public int uStatus { get; set; }
 25         /// <summary>
 26         /// 备注
 27         /// </summary>
 28         public string uRemark { get; set; }
 29         /// <summary>
 30         /// 创建时间
 31         /// </summary>
 32         public System.DateTime uCreateTime { get; set; }
 33         /// <summary>
 34         /// 更新时间
 35         /// </summary>
 36         public System.DateTime uUpdateTime { get; set; }
 37     }
 38 }

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4、创建一个maps文件夹，主要是用来放对表字段进行约束的类sysUserInfoMap

sysUserInfoMap类：

  1 namespace Wchl.WMBlog.Model.Maps
  2 {
  3     public class sysUserInfoMap:EntityTypeConfiguration<sysUserInfo>
  4     {
  5         public sysUserInfoMap()
  6         {
  7             this.HasKey(u => u.uID);
  8             this.Property(u => u.uLoginName).HasMaxLength(60);
  9             this.Property(u => u.uLoginPWD).HasMaxLength(60);
 10             this.Property(u => u.uRealName).HasMaxLength(60);
 11         }
 12     }
 13 }

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关于EntityTypeConfiguration类的用法，大家可以去看看博客园里面一些介绍文章，HasKey设置主键，HasMaxLength字段最大长度。

5、在控制台中创建数据库脚本 Enable-Migrations

6、修改Configuration类配置

7、在WMBlogDB类中重写OnModelCreating方法

重写OnModelCreating方法：

  1         protected override void OnModelCreating(DbModelBuilder modelBuilder)
  2         {
  3             //移除表名为复数
  4             modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
  5             //自动添加实现EntityTypeConfiguration的类
  6             modelBuilder.Configurations.AddFromAssembly(Assembly.GetExecutingAssembly());
  7             base.OnModelCreating(modelBuilder);
  8         }

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二、仓储层建设

1、在Wchl.WMBlog.IRepository中创建一个类，做为操作数据的父接口IBaseRepository，这里使用泛型来创建

IBaseRepository接口

  1 namespace Wchl.WMBlog.IRepository.Base
  2 {
  3     public interface IBaseRepository<TEntity> where TEntity:class
  4     {
  5         #region 查询
  6         /// <summary>
  7         /// 单表查询
  8         /// </summary>
  9         /// <param name="predicate"></param>
 10         /// <returns></returns>
 11         List<TEntity> QueryWhere(Expression<Func<TEntity, bool>> predicate);
 12 
 13         /// <summary>
 14         /// 多表关联查询
 15         /// </summary>
 16         /// <param name="predicate"></param>
 17         /// <param name="tableNames"></param>
 18         /// <returns></returns>
 19         List<TEntity> QueryJoin(Expression<Func<TEntity, bool>> predicate, string[] tableNames);
 20         /// <summary>
 21         /// 升序查询还是降序查询
 22         /// </summary>
 23         /// <typeparam name="TKey"></typeparam>
 24         /// <param name="predicate"></param>
 25         /// <param name="keySelector"></param>
 26         /// <param name="IsQueryOrderBy"></param>
 27         /// <returns></returns>
 28         List<TEntity> QueryOrderBy<TKey>(Expression<Func<TEntity, bool>> predicate, Expression<Func<TEntity, TKey>> keySelector, bool IsQueryOrderBy);
 29 
 30         /// <summary>
 31         /// 升序分页查询还是降序分页
 32         /// </summary>
 33         /// <typeparam name="TKey"></typeparam>
 34         /// <param name="pageIndex">第几页</param>
 35         /// <param name="pagesize">一页多少条</param>
 36         /// <param name="rowcount">返回共多少条</param>
 37         /// <param name="predicate">查询条件</param>
 38         /// <param name="keySelector">排序字段</param>
 39         /// <param name="IsQueryOrderBy">true为升序 false为降序</param>
 40         /// <returns></returns>
 41         List<TEntity> QueryByPage<TKey>(int pageIndex, int pagesize, out int rowcount, Expression<Func<TEntity, bool>> predicate, Expression<Func<TEntity, TKey>> keySelector, bool IsQueryOrderBy);
 42         #endregion
 43 
 44         #region 编辑
 45         /// <summary>
 46         /// 通过传入的model加需要修改的字段来更改数据
 47         /// </summary>
 48         /// <param name="model"></param>
 49         /// <param name="propertys"></param>
 50         void Edit(TEntity model, string[] propertys);
 51 
 52         /// <summary>
 53         /// 直接查询之后再修改
 54         /// </summary>
 55         /// <param name="model"></param>
 56         void Edit(TEntity model);
 57         #endregion
 58 
 59         #region 删除
 60         void Delete(TEntity model, bool isadded);
 61         #endregion
 62 
 63         #region 新增
 64         void Add(TEntity model);
 65         #endregion
 66 
 67         #region 统一提交
 68         int SaverChanges();
 69         #endregion
 70 
 71         #region 调用存储过程返回一个指定的TResult
 72         List<TResult> RunProc<TResult>(string sql, params object[] pamrs);
 73         #endregion
 74     }
 75 }

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2、然后实现IBaseRepository接口，在Wchl.WMBlog.Repository程序集中创建BaseRepository类来实现对数据操作的查询、增加、删除、编辑等。

BaseRepository类

  1 namespace Wchl.WMBlog.Repository.Base
  2 {
  3     public class BaseRepository<TEntity>: IBaseRepository<TEntity> where TEntity:class
  4     {
  5         WMBlogDB db = new WMBlogDB();
  6 
  7         DbSet<TEntity> _dbSet;
  8 
  9         public BaseRepository()
 10         {
 11             _dbSet = db.Set<TEntity>();
 12         }
 13 
 14         #region 查询
 15         /// <summary>
 16         /// 单表查询
 17         /// </summary>
 18         /// <param name="predicate"></param>
 19         /// <returns></returns>
 20         public List<TEntity> QueryWhere(Expression<Func<TEntity, bool>> predicate)
 21         {
 22            return _dbSet.Where(predicate).ToList();
 23         }
 24 
 25         /// <summary>
 26         /// 多表关联查询
 27         /// </summary>
 28         /// <param name="predicate"></param>
 29         /// <param name="tableNames"></param>
 30         /// <returns></returns>
 31         public List<TEntity> QueryJoin(Expression<Func<TEntity, bool>> predicate, string[] tableNames)
 32         {
 33             if (tableNames == null && tableNames.Any() == false)
 34             {
 35                 throw new Exception("缺少连表名称");
 36             }
 37 
 38             DbQuery<TEntity> query = _dbSet;
 39 
 40             foreach (var table in tableNames)
 41             {
 42                 query = query.Include(table);
 43             }
 44 
 45             return query.Where(predicate).ToList();
 46         }
 47 
 48         /// <summary>
 49         /// 升序查询还是降序查询
 50         /// </summary>
 51         /// <typeparam name="TKey"></typeparam>
 52         /// <param name="predicate"></param>
 53         /// <param name="keySelector"></param>
 54         /// <param name="IsQueryOrderBy"></param>
 55         /// <returns></returns>
 56         public List<TEntity> QueryOrderBy<TKey>(Expression<Func<TEntity, bool>> predicate, Expression<Func<TEntity, TKey>> keySelector,bool IsQueryOrderBy)
 57         {
 58             if (IsQueryOrderBy)
 59             {
 60                 return _dbSet.Where(predicate).OrderBy(keySelector).ToList();
 61             }
 62             return _dbSet.Where(predicate).OrderByDescending(keySelector).ToList();
 63 
 64         }
 65 
 66         /// <summary>
 67         /// 升序分页查询还是降序分页
 68         /// </summary>
 69         /// <typeparam name="TKey"></typeparam>
 70         /// <param name="pageIndex">第几页</param>
 71         /// <param name="pagesize">一页多少条</param>
 72         /// <param name="rowcount">返回共多少条</param>
 73         /// <param name="predicate">查询条件</param>
 74         /// <param name="keySelector">排序字段</param>
 75         /// <param name="IsQueryOrderBy">true为升序 false为降序</param>
 76         /// <returns></returns>
 77         public List<TEntity> QueryByPage<TKey>(int pageIndex,int pagesize,out int rowcount,Expression<Func<TEntity, bool>> predicate, Expression<Func<TEntity, TKey>> keySelector, bool IsQueryOrderBy)
 78         {
 79             rowcount = _dbSet.Count(predicate);
 80             if (IsQueryOrderBy)
 81             {
 82                 return _dbSet.Where(predicate).OrderBy(keySelector).Skip((pageIndex - 1) * pagesize).Take(pagesize).ToList();
 83             }
 84             else
 85             {
 86                 return _dbSet.Where(predicate).OrderByDescending(keySelector).Skip((pageIndex - 1) * pagesize).Take(pagesize).ToList();
 87             }
 88         }
 89         #endregion
 90 
 91         #region 编辑
 92         /// <summary>
 93         /// 通过传入的model加需要修改的字段来更改数据
 94         /// </summary>
 95         /// <param name="model"></param>
 96         /// <param name="propertys"></param>
 97         public void Edit(TEntity model, string[] propertys)
 98         {
 99             if (model == null)
100             {
101                 throw new Exception("实体不能为空");
102             }
103 
104             if (propertys.Any() == false)
105             {
106                 throw new Exception("要修改的属性至少要有一个");
107             }
108 
109             //将model追击到EF容器
110             DbEntityEntry entry = db.Entry(model);
111 
112             entry.State = EntityState.Unchanged;
113 
114             foreach (var item in propertys)
115             {
116                 entry.Property(item).IsModified = true;
117             }
118 
119             //关闭EF对于实体的合法性验证参数
120             db.Configuration.ValidateOnSaveEnabled = false;
121         }
122 
123         /// <summary>
124         /// 直接查询之后再修改
125         /// </summary>
126         /// <param name="model"></param>
127         public void Edit(TEntity model)
128         {
129             db.Entry(model).State = EntityState.Modified;
130         }
131         #endregion
132 
133         #region 删除
134         public void Delete(TEntity model, bool isadded)
135         {
136             if (!isadded) {
137                 _dbSet.Attach(model);
138             }
139             _dbSet.Remove(model);
140         }
141         #endregion
142 
143         #region 新增
144         public void Add(TEntity model)
145         {
146             _dbSet.Add(model);
147         }
148         #endregion
149 
150         #region 统一提交
151         public int SaverChanges()
152         {
153             return db.SaveChanges();
154         }
155         #endregion
156 
157         #region 调用存储过程返回一个指定的TResult
158         public List<TResult> RunProc<TResult>(string sql, params object[] pamrs)
159         {
160             return db.Database.SqlQuery<TResult>(sql, pamrs).ToList();
161         }
162         #endregion
163     }
164 }

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三、业务逻辑层父接口和父类创建

1、在Wchl.WMBlog.IServices程序集中创建IBaseServices接口

IBaseServices接口：

  1 namespace Wchl.WMBlog.IServices.Base
  2 {
  3     public interface IBaseServices<TEntity> where TEntity:class
  4     {
  5         #region 查询
  6         /// <summary>
  7         /// 单表查询
  8         /// </summary>
  9         /// <param name="predicate"></param>
 10         /// <returns></returns>
 11         List<TEntity> QueryWhere(Expression<Func<TEntity, bool>> predicate);
 12 
 13         /// <summary>
 14         /// 多表关联查询
 15         /// </summary>
 16         /// <param name="predicate"></param>
 17         /// <param name="tableNames"></param>
 18         /// <returns></returns>
 19         List<TEntity> QueryJoin(Expression<Func<TEntity, bool>> predicate, string[] tableNames);
 20         /// <summary>
 21         /// 升序查询还是降序查询
 22         /// </summary>
 23         /// <typeparam name="TKey"></typeparam>
 24         /// <param name="predicate"></param>
 25         /// <param name="keySelector"></param>
 26         /// <param name="IsQueryOrderBy"></param>
 27         /// <returns></returns>
 28         List<TEntity> QueryOrderBy<TKey>(Expression<Func<TEntity, bool>> predicate, Expression<Func<TEntity, TKey>> keySelector, bool IsQueryOrderBy);
 29 
 30         /// <summary>
 31         /// 升序分页查询还是降序分页
 32         /// </summary>
 33         /// <typeparam name="TKey"></typeparam>
 34         /// <param name="pageIndex">第几页</param>
 35         /// <param name="pagesize">一页多少条</param>
 36         /// <param name="rowcount">返回共多少条</param>
 37         /// <param name="predicate">查询条件</param>
 38         /// <param name="keySelector">排序字段</param>
 39         /// <param name="IsQueryOrderBy">true为升序 false为降序</param>
 40         /// <returns></returns>
 41         List<TEntity> QueryByPage<TKey>(int pageIndex, int pagesize, out int rowcount, Expression<Func<TEntity, bool>> predicate, Expression<Func<TEntity, TKey>> keySelector, bool IsQueryOrderBy);
 42         #endregion
 43 
 44         #region 编辑
 45         /// <summary>
 46         /// 通过传入的model加需要修改的字段来更改数据
 47         /// </summary>
 48         /// <param name="model"></param>
 49         /// <param name="propertys"></param>
 50         void Edit(TEntity model, string[] propertys);
 51 
 52         /// <summary>
 53         /// 直接查询之后再修改
 54         /// </summary>
 55         /// <param name="model"></param>
 56         void Edit(TEntity model);
 57         #endregion
 58 
 59         #region 删除
 60         void Delete(TEntity model, bool isadded);
 61         #endregion
 62 
 63         #region 新增
 64         void Add(TEntity model);
 65         #endregion
 66 
 67         #region 统一提交
 68         int SaverChanges();
 69         #endregion
 70 
 71         #region 调用存储过程返回一个指定的TResult
 72         List<TResult> RunProc<TResult>(string sql, params object[] pamrs);
 73         #endregion
 74     }
 75 }

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2、在Wchl.WMBlog.Services程序集创建BaseServices类

BaseServices类

  1 namespace Wchl.WMBlog.Services.Base
  2 {
  3    public class BaseServices<TEntity>: IBaseServices<TEntity> where TEntity:class
  4     {
  5         public IBaseRepository<TEntity> baseDal = new BaseRepository<TEntity>();
  6 
  7         #region 查询
  8         /// <summary>
  9         /// 单表查询
 10         /// </summary>
 11         /// <param name="predicate"></param>
 12         /// <returns></returns>
 13         public List<TEntity> QueryWhere(Expression<Func<TEntity, bool>> predicate)
 14         {
 15             return baseDal.QueryWhere(predicate);
 16         }
 17 
 18         /// <summary>
 19         /// 多表关联查询
 20         /// </summary>
 21         /// <param name="predicate"></param>
 22         /// <param name="tableNames"></param>
 23         /// <returns></returns>
 24         public List<TEntity> QueryJoin(Expression<Func<TEntity, bool>> predicate, string[] tableNames)
 25         {
 26             return baseDal.QueryJoin(predicate, tableNames);
 27 
 28         }
 29 
 30         /// <summary>
 31         /// 升序查询还是降序查询
 32         /// </summary>
 33         /// <typeparam name="TKey"></typeparam>
 34         /// <param name="predicate"></param>
 35         /// <param name="keySelector"></param>
 36         /// <param name="IsQueryOrderBy"></param>
 37         /// <returns></returns>
 38         public List<TEntity> QueryOrderBy<TKey>(Expression<Func<TEntity, bool>> predicate, Expression<Func<TEntity, TKey>> keySelector, bool IsQueryOrderBy)
 39         {
 40             return baseDal.QueryOrderBy(predicate, keySelector, IsQueryOrderBy);
 41         }
 42 
 43         /// <summary>
 44         /// 升序分页查询还是降序分页
 45         /// </summary>
 46         /// <typeparam name="TKey"></typeparam>
 47         /// <param name="pageIndex">第几页</param>
 48         /// <param name="pagesize">一页多少条</param>
 49         /// <param name="rowcount">返回共多少条</param>
 50         /// <param name="predicate">查询条件</param>
 51         /// <param name="keySelector">排序字段</param>
 52         /// <param name="IsQueryOrderBy">true为升序 false为降序</param>
 53         /// <returns></returns>
 54         public List<TEntity> QueryByPage<TKey>(int pageIndex, int pagesize, out int rowcount, Expression<Func<TEntity, bool>> predicate, Expression<Func<TEntity, TKey>> keySelector, bool IsQueryOrderBy)
 55         {
 56 
 57             return baseDal.QueryByPage(pageIndex, pagesize,out rowcount, predicate, keySelector, IsQueryOrderBy);
 58 
 59         }
 60         #endregion
 61 
 62         #region 编辑
 63         /// <summary>
 64         /// 通过传入的model加需要修改的字段来更改数据
 65         /// </summary>
 66         /// <param name="model"></param>
 67         /// <param name="propertys"></param>
 68         public void Edit(TEntity model, string[] propertys)
 69         {
 70             baseDal.Edit(model, propertys);
 71         }
 72 
 73         /// <summary>
 74         /// 直接查询之后再修改
 75         /// </summary>
 76         /// <param name="model"></param>
 77         public void Edit(TEntity model)
 78         {
 79             baseDal.Edit(model);
 80         }
 81         #endregion
 82 
 83         #region 删除
 84         public void Delete(TEntity model, bool isadded)
 85         {
 86             baseDal.Delete(model, isadded);
 87         }
 88         #endregion
 89 
 90         #region 新增
 91         public void Add(TEntity model)
 92         {
 93             baseDal.Add(model);
 94         }
 95         #endregion
 96 
 97         #region 统一提交
 98         public int SaverChanges()
 99         {
100            return baseDal.SaverChanges();
101         }
102         #endregion
103 
104         #region 调用存储过程返回一个指定的TResult
105         public List<TResult> RunProc<TResult>(string sql, params object[] pamrs)
106         {
107            return baseDal.RunProc<TResult>(sql, pamrs);
108         }
109         #endregion
110     }
111 }

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到目前为止数据库、仓储层、业务逻辑层的父类和父接口都实现了，下一篇博文就在UI层怎么调用，测试看，成功写成功没。

谢谢大家的支持，多提宝贵意见。

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原文地址：https://www.cnblogs.com/M-LittleBird/p/5897509.html