ASP.net MVC基于EntityFrameWork 的 MODEL层控制反转(IOC)架构设计

using Common;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;
using System.Data.Entity.Infrastructure;
using System.Data.Entity;
using System.Linq.Expressions;

namespace Service
{
/// <summary>
/// 所有的数据操作基类接口
/// </summary>
public interface IRepository<T> where T : class
{
#region 数据对象操作
/// <summary>
/// 数据上下文
/// </summary>
DbContext Context { get; }
/// <summary>
/// 数据库配置
/// </summary>
Domain.MyConfig Config { get; }
/// <summary>
/// 数据模型操作
/// </summary>
DbSet<T> dbSet { get; }
/// <summary>
/// EF事务
/// </summary>
DbContextTransaction Transaction { get; set; }
/// <summary>
/// 事务提交结果
/// </summary>
bool Committed { get; set; }
/// <summary>
/// 提交事务
/// </summary>
void Commit();
/// <summary>
/// 回滚事务
/// </summary>
void Rollback();
#endregion

#region 单模型操作
/// <summary>
/// 获取实体
/// </summary>
/// <param name="id">主键</param>
/// <returns>实体</returns>
T Get(Expression<Func<T, bool>> predicate);
/// <summary>
/// 插入实体
/// </summary>
/// <param name="entity">实体</param>
/// <returns>ID</returns>
bool Save(T entity);

/// <summary>
/// 修改实体
/// </summary>
/// <param name="entity">实体</param>
bool Update(T entity);
/// <summary>
/// 修改或保存实体
/// </summary>
/// <param name="entity">实体</param>
bool SaveOrUpdate(T entity, bool isEdit);

/// <summary>
/// 删除实体
/// </summary>
int Delete(Expression<Func<T, bool>> predicate = null);

/// <summary>
/// 执行SQL删除
/// </summary>
int DeleteBySql(string sql, params DbParameter[] para);

/// <summary>
/// 根据属性验证实体对象是否存在
/// </summary>
bool IsExist(Expression<Func<T, bool>> predicate);

/// <summary>
/// 根据SQL验证实体对象是否存在
/// </summary>
bool IsExist(string sql, params DbParameter[] para);
#endregion

#region 多模型操作
/// <summary>
/// 增加多模型数据，指定独立模型集合
/// </summary>
int SaveList<T1>(List<T1> t) where T1 : class;
/// <summary>
/// 增加多模型数据，与当前模型一致
/// </summary>
int SaveList(List<T> t);
/// <summary>
/// 更新多模型，指定独立模型集合
/// </summary>
int UpdateList<T1>(List<T1> t) where T1 : class;
/// <summary>
/// 更新多模型，与当前模型一致
/// </summary>
int UpdateList(List<T> t);
/// <summary>
/// 批量删除数据，当前模型
/// </summary>
int DeleteList(List<T> t);
/// <summary>
/// 批量删除数据，独立模型
/// </summary>
int DeleteList<T1>(List<T1> t) where T1 : class;
#endregion

#region 存储过程操作
/// <summary>
/// 执行增删改存储过程
/// </summary>
object ExecuteProc(string procname, params DbParameter[] parameter);
/// <summary>
/// 执行查询的存储过程
/// </summary>
object ExecuteQueryProc(string procname, params DbParameter[] parameter);
#endregion

#region 查询多条数据
/// <summary>
/// 获取集合 IQueryable
/// </summary>
IQueryable<T> LoadAll(Expression<Func<T, bool>> predicate);
/// <summary>
/// 获取集合 IList
/// </summary>
List<T> LoadListAll(Expression<Func<T, bool>> predicate);
/// <summary>
/// 获取DbQuery的列表
/// </summary>
DbQuery<T> LoadQueryAll(Expression<Func<T, bool>> predicate);
/// <summary>
/// 获取IEnumerable列表
/// </summary>
IEnumerable<T> LoadEnumerableAll(string sql, params DbParameter[] para);
/// <summary>
/// 获取数据动态集合
/// </summary>
System.Collections.IEnumerable LoadEnumerable(string sql, params DbParameter[] para);
/// <summary>
/// 采用SQL进行数据的查询，并转换
/// </summary>
List<T> SelectBySql(string sql, params DbParameter[] para);
List<T1> SelectBySql<T1>(string sql, params DbParameter[] para);
/// <summary>
/// 可指定返回结果、排序、查询条件的通用查询方法，返回实体对象
/// </summary>
/// <typeparam name="TEntity">实体对象</typeparam>
/// <typeparam name="TOrderBy">排序字段类型</typeparam>
/// <typeparam name="TResult">数据结果，一般为object</typeparam>
/// <param name="where">过滤条件，需要用到类型转换的需要提前处理与数据表一致的</param>
/// <param name="orderby">排序字段</param>
/// <param name="selector">返回结果（必须是模型中存在的字段）</param>
/// <param name="IsAsc">排序方向，true为正序false为倒序</param>
/// <returns>实体集合</returns>
List<TResult> QueryEntity<TEntity, TOrderBy, TResult>(Expression<Func<TEntity, bool>> where, Expression<Func<TEntity, TOrderBy>> orderby, Expression<Func<TEntity, TResult>> selector, bool IsAsc)
where TEntity : class
where TResult : class;
/// <summary>
/// 可指定返回结果、排序、查询条件的通用查询方法，返回Object对象
/// </summary>
/// <typeparam name="TEntity">实体对象</typeparam>
/// <typeparam name="TOrderBy">排序字段类型</typeparam>
/// <param name="where">过滤条件，需要用到类型转换的需要提前处理与数据表一致的</param>
/// <param name="orderby">排序字段</param>
/// <param name="selector">返回结果（必须是模型中存在的字段）</param>
/// <param name="IsAsc">排序方向，true为正序false为倒序</param>
/// <returns>自定义实体集合</returns>
List<object> QueryObject<TEntity, TOrderBy>(Expression<Func<TEntity, bool>> where, Expression<Func<TEntity, TOrderBy>> orderby, Func<IQueryable<TEntity>, List<object>> selector, bool IsAsc)
where TEntity : class;
/// <summary>
/// 可指定返回结果、排序、查询条件的通用查询方法，返回动态类对象
/// </summary>
/// <typeparam name="TEntity">实体对象</typeparam>
/// <typeparam name="TOrderBy">排序字段类型</typeparam>
/// <param name="where">过滤条件，需要用到类型转换的需要提前处理与数据表一致的</param>
/// <param name="orderby">排序字段</param>
/// <param name="selector">返回结果（必须是模型中存在的字段）</param>
/// <param name="IsAsc">排序方向，true为正序false为倒序</param>
/// <returns>动态类对象</returns>
dynamic QueryDynamic<TEntity, TOrderBy>(Expression<Func<TEntity, bool>> where, Expression<Func<TEntity, TOrderBy>> orderby, Func<IQueryable<TEntity>, List<object>> selector, bool IsAsc)
where TEntity : class;
#endregion

#region 分页查询

/// <summary>
/// 通过SQL分页
/// </summary>
/// <param name="sql"></param>
/// <param name="parameters"></param>
/// <param name="page"></param>
/// <returns></returns>
IList<T1> PageByListSql<T1>(string sql, IList<DbParameter> parameters, PageCollection page);
IList<T> PageByListSql(string sql, IList<DbParameter> parameters, PageCollection page);
/// <summary>
/// 通用EF分页，默认显示20条记录
/// </summary>
/// <typeparam name="TEntity">实体模型</typeparam>
/// <typeparam name="TOrderBy">排序类型</typeparam>
/// <param name="index">当前页</param>
/// <param name="pageSize">显示条数</param>
/// <param name="where">过滤条件</param>
/// <param name="orderby">排序字段</param>
/// <param name="selector">结果集合</param>
/// <param name="isAsc">排序方向true正序 false倒序</param>
/// <returns>自定义实体集合</returns>
PageInfo<object> Query<TEntity, TOrderBy>
(int index, int pageSize,
Expression<Func<TEntity, bool>> where,
Expression<Func<TEntity, TOrderBy>> orderby,
Func<IQueryable<TEntity>, List<object>> selector,
bool IsAsc)
where TEntity : class;
/// <summary>
/// 对IQueryable对象进行分页逻辑处理，过滤、查询项、排序对IQueryable操作
/// </summary>
/// <param name="t">Iqueryable</param>
/// <param name="index">当前页</param>
/// <param name="PageSize">每页显示多少条</param>
/// <returns>当前IQueryable to List的对象</returns>
Common.PageInfo<T> Query(IQueryable<T> query, int index, int PageSize);
/// <summary>
/// 普通SQL查询分页方法
/// </summary>
/// <param name="index">当前页</param>
/// <param name="pageSize">显示行数</param>
/// <param name="tableName">表名/视图</param>
/// <param name="field">获取项</param>
/// <param name="filter">过滤条件</param>
/// <param name="orderby">排序字段+排序方向</param>
/// <param name="group">分组字段</param>
/// <returns>结果集</returns>
Common.PageInfo Query(int index, int pageSize, string tableName, string field, string filter, string orderby, string group, params DbParameter[] para);
/// <summary>
/// 简单的Sql查询分页
/// </summary>
/// <param name="index"></param>
/// <param name="pageSize"></param>
/// <param name="sql"></param>
/// <returns></returns>
Common.PageInfo Query(int index, int pageSize, string sql, string orderby, params DbParameter[] para);
/// <summary>
/// 多表联合分页算法
/// </summary>
PageInfo Query(IQueryable query, int index, int pagesize);
#endregion

#region ADO.NET增删改查方法
/// <summary>
/// 执行增删改方法,含事务处理
/// </summary>
object ExecuteSqlCommand(string sql, params DbParameter[] para);
/// <summary>
/// 执行多条SQL，增删改方法,含事务处理
/// </summary>
object ExecuteSqlCommand(Dictionary<string, object> sqllist);
/// <summary>
/// 执行查询方法,返回动态类，接收使用var，遍历时使用dynamic类型
/// </summary>
object ExecuteSqlQuery(string sql, params DbParameter[] para);
#endregion
}
}

using System.Collections.Generic;

namespace Common
{
/// <summary>
/// 分页逻辑处理类
/// </summary>
public class PageCollection
{
/// <summary>
/// 总页数
/// </summary>
public int TotalPages { get; set; }
/// <summary>
/// 当前页面
/// </summary>
public int CurrentPage { get; set; }
/// <summary>
/// 每页的记录数
/// </summary>
public int OnePageSize { get; set; }
/// <summary>
/// 总记录数
/// </summary>
public long TotalRows { get; set; }
/// <summary>
/// 排序
/// </summary>
public string OrderBy { get; set; }

/// <summary>
/// 构造无参默认为最大数
/// </summary>
public PageCollection()
{
this.CurrentPage = 0;
this.OnePageSize = 20;//默认最大行数20条
}
}
/// <summary>
/// 分页逻辑处理类 linq to entites
/// </summary>
public class PageInfo<TEntity> where TEntity : class
{
public PageInfo(int index, int pageSize, int count, List<TEntity> list, string url = "")
{
Index = index;
PageSize = pageSize;
Count = count;
List = list;
Url = url;
//计算数据条数从开始到结束的值
if (count == 0)
{
BeginPage = 0;
EndPage = 0;
}
else
{
int maxpage = count / pageSize;

if (count % pageSize > 0)
{
maxpage++;
}
if (index >= maxpage)
{
index = maxpage;

BeginPage = pageSize * index - pageSize + 1;
EndPage = count;
}
else
{
BeginPage = pageSize * index - pageSize + 1;
EndPage = pageSize * index;
}
}
}

public int Index { get; private set; }
public int PageSize { get; private set; }
public int Count { get; private set; }
public List<TEntity> List { get; set; }
public string Url { get; set; }
public int BeginPage { get; private set; }
public int EndPage { get; private set; }
}

/// <summary>
/// 分页逻辑处理类 dynamic
/// </summary>
public class PageInfo
{
public PageInfo(int index, int pageSize, int count, dynamic list, string url = "")
{
Index = index;
PageSize = pageSize;
Count = count;
List = list;
Url = url;
//计算数据条数从开始到结束的值
if (count == 0)
{
BeginPage = 0;
EndPage = 0;
}
else
{
int maxpage = count / pageSize;

if (count % pageSize > 0)
{
maxpage++;
}
if (index >= maxpage)
{
index = maxpage;

BeginPage = pageSize * index - pageSize + 1;
EndPage = count;
}
else
{
BeginPage = pageSize * index - pageSize + 1;
EndPage = pageSize * index;
}
}
}

public int Index { get; private set; }
public int PageSize { get; private set; }
public int Count { get; private set; }
public dynamic List { get; private set; }
public string Url { get; set; }
public int BeginPage { get; private set; }
public int EndPage { get; private set; }
}

/// <summary>
/// Eazyui分页处理逻辑类
/// </summary>
public class PageEazyUi
{
public PageEazyUi(int _page, int _pagesize, int _total, object _rows)
{
page = _page;
pagesize = _pagesize;
total = _total;
rows = _rows;
}

public int page { get; private set; }
public int pagesize { get; private set; }
public int total { get; private set; }
public object rows { get; private set; }
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.Common;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
using Domain;
using System.Linq.Expressions;
using System.Collections;

namespace Service
{
/// <summary>
/// 数据操作基本实现类，公用实现方法
/// add yuangang by 2016-05-10
/// </summary>
/// <typeparam name="T">具体操作的实体模型</typeparam>
public abstract class RepositoryBase<T> : IRepository<T> where T : class
{
#region 固定公用帮助，含事务

private DbContext context = new MyConfig().db;
/// <summary>
/// 数据上下文--->根据Domain实体模型名称进行更改
/// </summary>
public DbContext Context
{
get
{
context.Configuration.ValidateOnSaveEnabled = false;
return context;
}
}
/// <summary>
/// 数据上下文--->拓展属性
/// </summary>
public MyConfig Config
{
get
{
return new MyConfig();
}
}
/// <summary>
/// 公用泛型处理属性
/// 注:所有泛型操作的基础
/// </summary>
public DbSet<T> dbSet
{
get { return this.Context.Set<T>(); }
}
/// <summary>
/// 事务
/// </summary>
private DbContextTransaction _transaction = null;
/// <summary>
/// 开始事务
/// </summary>
public DbContextTransaction Transaction
{
get
{
if (this._transaction == null)
{
this._transaction = this.Context.Database.BeginTransaction();
}
return this._transaction;
}
set { this._transaction = value; }
}
/// <summary>
/// 事务状态
/// </summary>
public bool Committed { get; set; }
/// <summary>
/// 异步锁定
/// </summary>
private readonly object sync = new object();
/// <summary>
/// 提交事务
/// </summary>
public void Commit()
{
if (!Committed)
{
lock (sync)
{
if (this._transaction != null)
_transaction.Commit();
}
Committed = true;
}
}
/// <summary>
/// 回滚事务
/// </summary>
public void Rollback()
{
Committed = false;
if (this._transaction != null)
this._transaction.Rollback();
}
#endregion

#region 获取单条记录
/// <summary>
/// 通过lambda表达式获取一条记录p=>p.id==id
/// </summary>
public virtual T Get(Expression<Func<T, bool>> predicate)
{
try
{
return dbSet.AsNoTracking().SingleOrDefault(predicate);
}
catch (Exception e)
{
throw e;
}
}
#endregion

#region 增删改操作

/// <summary>
/// 添加一条模型记录，自动提交更改
/// </summary>
public virtual bool Save(T entity)
{
try
{
int row = 0;
var entry = this.Context.Entry<T>(entity);
entry.State = System.Data.Entity.EntityState.Added;
row = Context.SaveChanges();
entry.State = System.Data.Entity.EntityState.Detached;
return row > 0;
}
catch (Exception e)
{
throw e;
}

}

/// <summary>
/// 更新一条模型记录，自动提交更改
/// </summary>
public virtual bool Update(T entity)
{
try
{
int rows = 0;
var entry = this.Context.Entry(entity);
entry.State = System.Data.Entity.EntityState.Modified;
rows = this.Context.SaveChanges();
entry.State = System.Data.Entity.EntityState.Detached;
return rows > 0;
}
catch (Exception e)
{
throw e;
}
}

/// <summary>
/// 更新模型记录，如不存在进行添加操作
/// </summary>
public virtual bool SaveOrUpdate(T entity, bool isEdit)
{
try
{
return isEdit ? Update(entity) : Save(entity);
}
catch (Exception e) { throw e; }
}

/// <summary>
/// 删除一条或多条模型记录，含事务
/// </summary>
public virtual int Delete(Expression<Func<T, bool>> predicate = null)
{
try
{
int rows = 0;
IQueryable<T> entry = (predicate == null) ? this.dbSet.AsQueryable() : this.dbSet.Where(predicate);
List<T> list = entry.ToList();
if (list.Count > 0)
{
for (int i = 0; i < list.Count; i++)
{
this.dbSet.Remove(list[i]);
}
rows = this.Context.SaveChanges();
}
return rows;
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 使用原始SQL语句,含事务处理
/// </summary>
public virtual int DeleteBySql(string sql, params DbParameter[] para)
{
try
{
return this.Context.Database.ExecuteSqlCommand(sql, para);
}
catch (Exception e)
{
throw e;
}
}
#endregion

#region 多模型操作

/// <summary>
/// 增加多模型数据，指定独立模型集合
/// </summary>
public virtual int SaveList<T1>(List<T1> t) where T1 : class
{
try
{
if (t == null || t.Count == 0) return 0;
this.Context.Set<T1>().Local.Clear();
foreach (var item in t)
{
this.Context.Set<T1>().Add(item);
}
return this.Context.SaveChanges();
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 增加多模型数据，与当前模型一致
/// </summary>
public virtual int SaveList(List<T> t)
{
try
{
this.dbSet.Local.Clear();
foreach (var item in t)
{
this.dbSet.Add(item);
}
return this.Context.SaveChanges();
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 更新多模型，指定独立模型集合
/// </summary>
public virtual int UpdateList<T1>(List<T1> t) where T1 : class
{
if (t.Count <= 0) return 0;
try
{
foreach (var item in t)
{
this.Context.Entry<T1>(item).State = System.Data.Entity.EntityState.Modified;
}
return this.Context.SaveChanges();
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 更新多模型，与当前模型一致
/// </summary>
public virtual int UpdateList(List<T> t)
{
if (t.Count <= 0) return 0;
try
{
foreach (var item in t)
{
this.Context.Entry(item).State = System.Data.Entity.EntityState.Modified;
}
return this.Context.SaveChanges();
}
catch (Exception e) { throw e; }
}
/// <summary>
/// 批量删除数据，当前模型
/// </summary>
public virtual int DeleteList(List<T> t)
{
if (t == null || t.Count == 0) return 0;
foreach (var item in t)
{
this.dbSet.Remove(item);
}
return this.Context.SaveChanges();
}
/// <summary>
/// 批量删除数据，自定义模型
/// </summary>
public virtual int DeleteList<T1>(List<T1> t) where T1 : class
{
try
{
if (t == null || t.Count == 0) return 0;
foreach (var item in t)
{
this.Context.Set<T1>().Remove(item);
}
return this.Context.SaveChanges();
}
catch (Exception e) { throw e; }
}
#endregion

#region 存储过程操作
/// <summary>
/// 执行返回影响行数的存储过程
/// </summary>
/// <param name="procname">过程名称</param>
/// <param name="parameter">参数对象</param>
/// <returns></returns>
public virtual object ExecuteProc(string procname, params DbParameter[] parameter)
{
try
{
return ExecuteSqlCommand(procname, parameter);
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 执行返回结果集的存储过程
/// </summary>
/// <param name="procname">过程名称</param>
/// <param name="parameter">参数对象</param>
/// <returns></returns>
public virtual object ExecuteQueryProc(string procname, params DbParameter[] parameter)
{
try
{
return this.Context.Database.SqlFunctionForDynamic(procname, parameter);
}
catch (Exception e)
{
throw e;
}
}
#endregion

#region 存在验证操作
/// <summary>
/// 验证当前条件是否存在相同项
/// </summary>
public virtual bool IsExist(Expression<Func<T, bool>> predicate)
{
var entry = this.dbSet.Where(predicate);
return (entry.Any());
}

/// <summary>
/// 根据SQL验证实体对象是否存在
/// </summary>
public virtual bool IsExist(string sql, params DbParameter[] para)
{
IEnumerable result = this.Context.Database.SqlQuery(typeof(int), sql, para);

if (result.GetEnumerator().Current == null || result.GetEnumerator().Current.ToString() == "0")
return false;
return true;
}
#endregion

#region 获取多条数据操作
/// <summary>
/// 返回IQueryable集合，延时加载数据
/// </summary>
public virtual IQueryable<T> LoadAll(Expression<Func<T, bool>> predicate)
{
try
{
if (predicate != null)
{
return this.dbSet.Where(predicate).AsNoTracking<T>();
}
return this.dbSet.AsQueryable<T>().AsNoTracking<T>();
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 返回DbQuery集合，延时加载数据
/// </summary>
public virtual DbQuery<T> LoadQueryAll(Expression<Func<T, bool>> predicate)
{
try
{
if (predicate != null)
{
return this.dbSet.Where(predicate) as DbQuery<T>;
}
return this.dbSet;
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 返回List集合,不采用延时加载
/// </summary>
public virtual List<T> LoadListAll(Expression<Func<T, bool>> predicate)
{
try
{
if (predicate != null)
{
return this.dbSet.Where(predicate).AsNoTracking().ToList();
}
return this.dbSet.AsQueryable<T>().AsNoTracking().ToList();
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 返回IEnumerable集合，采用原始T-Sql方式
/// </summary>
public virtual IEnumerable<T> LoadEnumerableAll(string sql, params DbParameter[] para)
{
try
{
return this.Context.Database.SqlQuery<T>(sql, para);
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 返回IEnumerable动态集合，采用原始T-Sql方式
/// </summary>
public virtual System.Collections.IEnumerable LoadEnumerable(string sql, params DbParameter[] para)
{
try
{
return this.Context.Database.SqlQueryForDynamic(sql, para);
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 返回IList集合，采用原始T-Sql方式
/// </summary>
public virtual List<T> SelectBySql(string sql, params DbParameter[] para)
{
try
{
return this.Context.Database.SqlQuery(typeof(T), sql, para).Cast<T>().ToList();
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 指定泛型，返回IList集合，采用原始T-Sql方式
/// </summary>
public virtual List<T1> SelectBySql<T1>(string sql, params DbParameter[] para)
{
try
{
return this.Context.Database.SqlQuery<T1>(sql, para).ToList();
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 可指定返回结果、排序、查询条件的通用查询方法，返回实体对象
/// </summary>
/// <typeparam name="TEntity">实体对象</typeparam>
/// <typeparam name="TOrderBy">排序字段类型</typeparam>
/// <typeparam name="TResult">数据结果，与TEntity一致</typeparam>
/// <param name="where">过滤条件，需要用到类型转换的需要提前处理与数据表一致的</param>
/// <param name="orderby">排序字段</param>
/// <param name="selector">返回结果（必须是模型中存在的字段）</param>
/// <param name="IsAsc">排序方向，true为正序false为倒序</param>
/// <returns>实体集合</returns>
public virtual List<TResult> QueryEntity<TEntity, TOrderBy, TResult>
(Expression<Func<TEntity, bool>> where,
Expression<Func<TEntity, TOrderBy>> orderby,
Expression<Func<TEntity, TResult>> selector,
bool IsAsc)
where TEntity : class
where TResult : class
{
IQueryable<TEntity> query = this.Context.Set<TEntity>();
if (where != null)
{
query = query.Where(where);
}

if (orderby != null)
{
query = IsAsc ? query.OrderBy(orderby) : query.OrderByDescending(orderby);
}
if (selector == null)
{
return query.Cast<TResult>().AsNoTracking().ToList();
}
return query.Select(selector).AsNoTracking().ToList();
}

/// <summary>
/// 可指定返回结果、排序、查询条件的通用查询方法，返回Object对象
/// </summary>
/// <typeparam name="TEntity">实体对象</typeparam>
/// <typeparam name="TOrderBy">排序字段类型</typeparam>
/// <param name="where">过滤条件，需要用到类型转换的需要提前处理与数据表一致的</param>
/// <param name="orderby">排序字段</param>
/// <param name="selector">返回结果（必须是模型中存在的字段）</param>
/// <param name="IsAsc">排序方向，true为正序false为倒序</param>
/// <returns>自定义实体集合</returns>
public virtual List<object> QueryObject<TEntity, TOrderBy>
(Expression<Func<TEntity, bool>> where,
Expression<Func<TEntity, TOrderBy>> orderby,
Func<IQueryable<TEntity>,
List<object>> selector,
bool IsAsc)
where TEntity : class
{
IQueryable<TEntity> query = this.Context.Set<TEntity>();
if (where != null)
{
query = query.Where(where);
}

if (orderby != null)
{
query = IsAsc ? query.OrderBy(orderby) : query.OrderByDescending(orderby);
}
if (selector == null)
{
return query.AsNoTracking().ToList<object>();
}
return selector(query);
}

/// <summary>
/// 可指定返回结果、排序、查询条件的通用查询方法，返回动态类对象
/// </summary>
/// <typeparam name="TEntity">实体对象</typeparam>
/// <typeparam name="TOrderBy">排序字段类型</typeparam>
/// <param name="where">过滤条件，需要用到类型转换的需要提前处理与数据表一致的</param>
/// <param name="orderby">排序字段</param>
/// <param name="selector">返回结果（必须是模型中存在的字段）</param>
/// <param name="IsAsc">排序方向，true为正序false为倒序</param>
/// <returns>动态类</returns>
public virtual dynamic QueryDynamic<TEntity, TOrderBy>
(Expression<Func<TEntity, bool>> where,
Expression<Func<TEntity, TOrderBy>> orderby,
Func<IQueryable<TEntity>,
List<object>> selector,
bool IsAsc)
where TEntity : class
{
List<object> list = QueryObject<TEntity, TOrderBy>
(where, orderby, selector, IsAsc);
return Common.JsonConverter.JsonClass(list);
}
#endregion

#region 分页操作
/// <summary>
/// 待自定义分页函数，使用必须重写，指定数据模型
/// </summary>
public virtual IList<T1> PageByListSql<T1>(string sql, IList<DbParameter> parameters, Common.PageCollection page)
{
return null;
}
/// <summary>
/// 待自定义分页函数，使用必须重写，
/// </summary>
public virtual IList<T> PageByListSql(string sql, IList<DbParameter> parameters, Common.PageCollection page)
{
return null;
}

/// <summary>
/// 对IQueryable对象进行分页逻辑处理，过滤、查询项、排序对IQueryable操作
/// </summary>
/// <param name="t">Iqueryable</param>
/// <param name="index">当前页</param>
/// <param name="PageSize">每页显示多少条</param>
/// <returns>当前IQueryable to List的对象</returns>
public virtual Common.PageInfo<T> Query(IQueryable<T> query, int index, int PageSize)
{
if (index < 1)
{
index = 1;
}
if (PageSize <= 0)
{
PageSize = 20;
}
int count = query.Count();

int maxpage = count / PageSize;

if (count % PageSize > 0)
{
maxpage++;
}
if (index > maxpage)
{
index = maxpage;
}
if (count > 0)
query = query.Skip((index - 1) * PageSize).Take(PageSize);
return new Common.PageInfo<T>(index, PageSize, count, query.ToList());
}
/// <summary>
/// 通用EF分页，默认显示20条记录
/// </summary>
/// <typeparam name="TEntity">实体模型</typeparam>
/// <typeparam name="TOrderBy">排序类型</typeparam>
/// <param name="index">当前页</param>
/// <param name="pageSize">显示条数</param>
/// <param name="where">过滤条件</param>
/// <param name="orderby">排序字段</param>
/// <param name="selector">结果集合</param>
/// <param name="isAsc">排序方向true正序 false倒序</param>
/// <returns>自定义实体集合</returns>
public virtual Common.PageInfo<object> Query<TEntity, TOrderBy>
(int index, int pageSize,
Expression<Func<TEntity, bool>> where,
Expression<Func<TEntity, TOrderBy>> orderby,
Func<IQueryable<TEntity>,
List<object>> selector,
bool isAsc)
where TEntity : class
{
if (index < 1)
{
index = 1;
}

if (pageSize <= 0)
{
pageSize = 20;
}

IQueryable<TEntity> query = this.Context.Set<TEntity>();
if (where != null)
{
query = query.Where(where);
}
int count = query.Count();

int maxpage = count / pageSize;

if (count % pageSize > 0)
{
maxpage++;
}
if (index > maxpage)
{
index = maxpage;
}

if (orderby != null)
{
query = isAsc ? query.OrderBy(orderby) : query.OrderByDescending(orderby);
}
if (count > 0)
query = query.Skip((index - 1) * pageSize).Take(pageSize);
//返回结果为null，返回所有字段
if (selector == null)
return new Common.PageInfo<object>(index, pageSize, count, query.ToList<object>());
return new Common.PageInfo<object>(index, pageSize, count, selector(query).ToList());
}
/// <summary>
/// 普通SQL查询分页方法
/// </summary>
/// <param name="index">当前页</param>
/// <param name="pageSize">显示行数</param>
/// <param name="tableName">表名/视图</param>
/// <param name="field">获取项</param>
/// <param name="filter">过滤条件</param>
/// <param name="orderby">排序字段+排序方向</param>
/// <param name="group">分组字段</param>
/// <returns>结果集</returns>
public virtual Common.PageInfo Query(int index, int pageSize, string tableName, string field, string filter, string orderby, string group, params DbParameter[] para)
{
//执行分页算法
if (index <= 0)
index = 1;
int start = (index - 1) * pageSize;
if (start > 0)
start -= 1;
else
start = 0;
int end = index * pageSize;

#region 查询逻辑
string logicSql = "SELECT";
//查询项
if (!string.IsNullOrEmpty(field))
{
logicSql += " " + field;
}
else
{
logicSql += " *";
}
logicSql += " FROM (" + tableName + " ) where";
//过滤条件
if (!string.IsNullOrEmpty(filter))
{
logicSql += " " + filter;
}
else
{
filter = " 1=1";
logicSql += "  1=1";
}
//分组
if (!string.IsNullOrEmpty(group))
{
logicSql += " group by " + group;
}

#endregion

//获取当前条件下数据总条数
int count = this.Context.Database.SqlQuery(typeof(int), "select count(*) from (" + tableName + ") where " + filter, para).Cast<int>().FirstOrDefault();
string sql = "SELECT T.* FROM ( SELECT B.* FROM ( SELECT A.*,ROW_NUMBER() OVER(ORDER BY getdate()) as RN" +
logicSql + ") A ) B WHERE B.RN<=" + end + ") T WHERE T.RN>" + start;
//排序
if (!string.IsNullOrEmpty(orderby))
{
sql += " order by " + orderby;
}
var list = ExecuteSqlQuery(sql, para) as IEnumerable;
if (list != null)
return new Common.PageInfo(index, pageSize, count, list.Cast<object>().ToList());
return new Common.PageInfo(index, pageSize, count, new { });
}

/// <summary>
/// 最简单的SQL分页
/// </summary>
/// <param name="index">页码</param>
/// <param name="pageSize">显示行数</param>
/// <param name="sql">纯SQL语句</param>
/// <param name="orderby">排序字段与方向</param>
/// <returns></returns>
public virtual Common.PageInfo Query(int index, int pageSize, string sql, string orderby, params DbParameter[] para)
{
return this.Query(index, pageSize, sql, null, null, orderby, null, para);
}
/// <summary>
/// 多表联合分页算法
/// </summary>
public virtual Common.PageInfo Query(IQueryable query, int index, int PageSize)
{
var enumerable = (query as System.Collections.IEnumerable).Cast<object>();
if (index < 1)
{
index = 1;
}
if (PageSize <= 0)
{
PageSize = 20;
}

int count = enumerable.Count();

int maxpage = count / PageSize;

if (count % PageSize > 0)
{
maxpage++;
}
if (index > maxpage)
{
index = maxpage;
}
if (count > 0)
enumerable = enumerable.Skip((index - 1) * PageSize).Take(PageSize);
return new Common.PageInfo(index, PageSize, count, enumerable.ToList());
}
#endregion

#region ADO.NET增删改查方法
/// <summary>
/// 执行增删改方法,含事务处理
/// </summary>
public virtual object ExecuteSqlCommand(string sql, params DbParameter[] para)
{
try
{
return this.Context.Database.ExecuteSqlCommand(sql, para);
}
catch (Exception e)
{
throw e;
}

}
/// <summary>
/// 执行多条SQL，增删改方法,含事务处理
/// </summary>
public virtual object ExecuteSqlCommand(Dictionary<string, object> sqllist)
{
try
{
int rows = 0;
IEnumerator<KeyValuePair<string, object>> enumerator = sqllist.GetEnumerator();
using (Transaction)
{
while (enumerator.MoveNext())
{
rows += this.Context.Database.ExecuteSqlCommand(enumerator.Current.Key, enumerator.Current.Value);
}
Commit();
}
return rows;
}
catch (Exception e)
{
Rollback();
throw e;
}

}
/// <summary>
/// 执行查询方法,返回动态类，接收使用var，遍历时使用dynamic类型
/// </summary>
public virtual object ExecuteSqlQuery(string sql, params DbParameter[] para)
{
try
{
return this.Context.Database.SqlQueryForDynamic(sql, para);
}
catch (Exception e)
{
throw e;
}
}
#endregion
}
}

using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.Entity;
using System.Linq;
using System.Reflection;
using System.Reflection.Emit;
using System.Text;

namespace Service
{
/// <summary>
/// 查询动态类
/// add yuangang by 2016-05-10
/// </summary>
public static class DatabaseExtensions
{
/// <summary>
/// 自定义Connection对象
/// </summary>
private static IDbConnection DefaultConnection
{
get
{
return Domain.MyConfig.DefaultConnection;
}
}
/// <summary>
/// 自定义数据库连接字符串，与EF连接模式一致
/// </summary>
private static string DefaultConnectionString
{
get
{
return Domain.MyConfig.DefaultConnectionString;
}
}
/// <summary>
/// 动态查询主方法
/// </summary>
/// <returns></returns>
public static IEnumerable SqlQueryForDynamic(this Database db,
string sql,
params object[] parameters)
{
IDbConnection defaultConn = DefaultConnection;

//ADO.NET数据库连接字符串
db.Connection.ConnectionString = DefaultConnectionString;

return SqlQueryForDynamicOtherDB(db, sql, defaultConn, parameters);
}
private static IEnumerable SqlQueryForDynamicOtherDB(this Database db,  string sql, IDbConnection conn, params object[] parameters)
{
conn.ConnectionString = db.Connection.ConnectionString;

if (conn.State != ConnectionState.Open)
{
conn.Open();
}

IDbCommand cmd = conn.CreateCommand();
cmd.CommandText = sql;
if (parameters != null)
{
foreach (var item in parameters)
{
cmd.Parameters.Add(item);
}
}

using (IDataReader dataReader = cmd.ExecuteReader())
{

if (!dataReader.Read())
{
return null; //无结果返回Null
}

#region 构建动态字段

TypeBuilder builder = DatabaseExtensions.CreateTypeBuilder(
"EF_DynamicModelAssembly",
"DynamicModule",
"DynamicType");

int fieldCount = dataReader.FieldCount;
for (int i = 0; i < fieldCount; i++)
{
Type t = dataReader.GetFieldType(i);
switch (t.Name.ToLower())
{
case "decimal":
t = typeof(Decimal?);
break;
case "double":
t = typeof(Double?);
break;
case "datetime":
t = typeof(DateTime?);
break;
case "single":
t = typeof(float?);
break;
case "int16":
t = typeof(int?);
break;
case "int32":
t = typeof(int?);
break;
case "int64":
t = typeof(int?);
break;
default:
break;
}
DatabaseExtensions.CreateAutoImplementedProperty(
builder,
dataReader.GetName(i),
t);
}

#endregion

cmd.Parameters.Clear();
dataReader.Close();
dataReader.Dispose();
cmd.Dispose();
conn.Close();
conn.Dispose();

Type returnType = builder.CreateType();

if (parameters != null)
{
return db.SqlQuery(returnType, sql, parameters);
}
else
{
return db.SqlQuery(returnType, sql);
}
}
}

private static TypeBuilder CreateTypeBuilder(string assemblyName, string moduleName, string typeName)
{
TypeBuilder typeBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(
new AssemblyName(assemblyName),
AssemblyBuilderAccess.Run).DefineDynamicModule(moduleName).DefineType(typeName,
TypeAttributes.Public);
typeBuilder.DefineDefaultConstructor(MethodAttributes.Public);
return typeBuilder;
}

private static void CreateAutoImplementedProperty(TypeBuilder builder, string propertyName, Type propertyType)
{
const string PrivateFieldPrefix = "m_";
const string GetterPrefix = "get_";
const string SetterPrefix = "set_";

// Generate the field.
FieldBuilder fieldBuilder = builder.DefineField(
string.Concat(
PrivateFieldPrefix, propertyName),
propertyType,
FieldAttributes.Private);

// Generate the property
PropertyBuilder propertyBuilder = builder.DefineProperty(
propertyName,
System.Reflection.PropertyAttributes.HasDefault,
propertyType, null);

// Property getter and setter attributes.
MethodAttributes propertyMethodAttributes = MethodAttributes.Public
| MethodAttributes.SpecialName
| MethodAttributes.HideBySig;

// Define the getter method.
MethodBuilder getterMethod = builder.DefineMethod(
string.Concat(
GetterPrefix, propertyName),
propertyMethodAttributes,
propertyType,
Type.EmptyTypes);

// Emit the IL code.
// ldarg.0
// ldfld,_field
// ret
ILGenerator getterILCode = getterMethod.GetILGenerator();
getterILCode.Emit(OpCodes.Ldarg_0);
getterILCode.Emit(OpCodes.Ldfld, fieldBuilder);
getterILCode.Emit(OpCodes.Ret);

// Define the setter method.
MethodBuilder setterMethod = builder.DefineMethod(
string.Concat(SetterPrefix, propertyName),
propertyMethodAttributes,
null,
new Type[] { propertyType });

// Emit the IL code.
// ldarg.0
// ldarg.1
// stfld,_field
// ret
ILGenerator setterILCode = setterMethod.GetILGenerator();
setterILCode.Emit(OpCodes.Ldarg_0);
setterILCode.Emit(OpCodes.Ldarg_1);
setterILCode.Emit(OpCodes.Stfld, fieldBuilder);
setterILCode.Emit(OpCodes.Ret);

propertyBuilder.SetGetMethod(getterMethod);
propertyBuilder.SetSetMethod(setterMethod);
}

public static dynamic SqlFunctionForDynamic(this Database db,
string sql,
params object[] parameters)
{
IDbConnection conn = DefaultConnection;

//ADO.NET数据库连接字符串
conn.ConnectionString = DefaultConnectionString;

if (conn.State != ConnectionState.Open)
{
conn.Open();
}

IDbCommand cmd = conn.CreateCommand();
cmd.CommandText = sql;
cmd.CommandType = CommandType.StoredProcedure;
if (parameters != null)
{
foreach (var item in parameters)
{
cmd.Parameters.Add(item);
}
}
//1、DataReader查询数据
using (IDataReader dataReader = cmd.ExecuteReader())
{
if (!dataReader.Read())
{
return null;
}
//2、DataReader转换Json
string jsonstr = Common.JsonConverter.ToJson(dataReader);
dataReader.Close();
dataReader.Dispose();
cmd.Dispose();
conn.Close();
conn.Dispose();
//3、Json转换动态类
dynamic dyna = Common.JsonConverter.ConvertJson(jsonstr);
return dyna;
}
}
/// <summary>
/// 对可空类型进行判断转换(*要不然会报错)
/// </summary>
/// <param name="value">DataReader字段的值</param>
/// <param name="conversionType">该字段的类型</param>
/// <returns></returns>
private static object CheckType(object value, Type conversionType)
{
if (conversionType.IsGenericType && conversionType.GetGenericTypeDefinition().Equals(typeof(Nullable<>)))
{
if (value == null)
return null;
System.ComponentModel.NullableConverter nullableConverter = new System.ComponentModel.NullableConverter(conversionType);
conversionType = nullableConverter.UnderlyingType;
}
return Convert.ChangeType(value, conversionType);
}

/// <summary>
/// 判断指定对象是否是有效值
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
private static bool IsNullOrDBNull(object obj)
{
return (obj == null || (obj is DBNull)) ? true : false;
}
}
}