EF

using System;
using System.Collections.Generic;
using System.Linq;
using System.Data;
using System.Data.Entity;
using System.Linq.Expressions;
using System.Reflection;
using Model;
namespace DAL
{
    public class UnitOfWork : IDisposable
    {
        XMinCMSEntities context = new XMinCMSEntities();
        //T_ATTACHMENT
        private GenericRepository<sysmenu> t_sysmenu_Repository;

        public GenericRepository<sysmenu> T_sysmenu_Repository
        {
            get
            {

                if (this.t_sysmenu_Repository == null)
                {
                    this.t_sysmenu_Repository = new GenericRepository<sysmenu>(context);
                }
                return t_sysmenu_Repository;
            }
        }

        public void Save()
        {
            context.SaveChanges();
        }

        private bool disposed = false;

        protected virtual void Dispose(bool disposing)
        {
            if (!this.disposed)
            {
                if (disposing)
                {
                    context.Dispose();
                }
            }
            this.disposed = true;
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

    }

    public class SortExpression<TEntity, TType>
    {
        Expression<Func<TEntity, TType>> SortProperty;
    }

    public class GenericRepository<TEntity> where TEntity : class
    {

        internal XMinCMSEntities context;
        internal DbSet<TEntity> dbSet;

        public GenericRepository(XMinCMSEntities context)
        {
            this.context = context;
            this.dbSet = context.Set<TEntity>();
        }
        public IQueryable<TEntity> GetAll()
        {
            return dbSet.AsQueryable();
        }

        public IQueryable<TEntity> GetPaged(out int total, Expression<Func<TEntity, bool>> filter = null, Func<IQueryable<TEntity>,
            IOrderedQueryable<TEntity>> orderBy = null, string includeProperties = "", int index = 0, int size = 50)
        {
            int skipCount = index * size;
            var _reset = Get(filter, orderBy, includeProperties);
            _reset = skipCount == 0 ? _reset.Take(size) : _reset.Skip(skipCount).Take(size);
            total = _reset.Count();
            return _reset.AsQueryable();
        }

        public IQueryable<TEntity> Get(Expression<Func<TEntity, bool>> filter = null, Func<IQueryable<TEntity>,
            IOrderedQueryable<TEntity>> orderBy = null, string includeProperties = "")
        {
            IQueryable<TEntity> query = dbSet;

            if (filter != null)
            {
                query = query.Where(filter);
            }

            foreach (var includeProperty in includeProperties.Split
                (new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
            {
                query = query.Include(includeProperty);
            }

            if (orderBy != null)
            {
                return orderBy(query).AsQueryable();
            }
            else
            {
                return query.AsQueryable();
            }
        }


        public IQueryable<TEntity> Filter(Expression<Func<TEntity, bool>> predicate)
        {
            return dbSet.Where(predicate).AsQueryable<TEntity>();
        }

        public IQueryable<TEntity> Filter<Key>(Expression<Func<TEntity, bool>> filter, out int total, int index = 0, int size = 50)
        {
            int skipCount = index * size;
            var _resetSet = filter != null ? dbSet.Where(filter).AsQueryable() : dbSet.AsQueryable();
            _resetSet = skipCount == 0 ? _resetSet.Take(size) : _resetSet.Skip(skipCount).Take(size);
            total = _resetSet.Count();
            return _resetSet.AsQueryable();
        }
        #region  4.0 查询方法 +GetList<Tkey>(Expression<Func<Tclass, bool>> strWhere, Expression<Func<Tclass, Tkey>> strOrederBy = null, bool order = true)
        /// <summary>
        /// 4.0 查询方法
        /// </summary>
        /// <typeparam name="Tkey">如果strOrederBy为null Tkey也可以DBNull</typeparam>
        /// <param name="strWhere">查询条件</param>
        /// <param name="SelectDelData">查询的结果集中 是否包括 已经软删除的数据</param>
        /// <param name="strOrederBy">排序条件</param>
        /// <param name="order">是否升序</param>
        ///  <param name="tableName">连接查询 的表名</param>
        /// <returns></returns>
        public IQueryable<TEntity> GetList(Expression<Func<TEntity, bool>> strWhere, bool SelectDelData = false, bool isAsNoTracking = true, string tableName = null)
        {
            Expression<Func<TEntity, bool>> exp = strWhere;
            //if (!SelectDelData)
            //    AddLinq.And(exp, GetWhereIsDel());

            IQueryable<TEntity> t = null;

            if (isAsNoTracking)
            {
                if (string.IsNullOrEmpty(tableName))
                    t = dbSet.AsNoTracking().Where(exp);
                else
                    t = dbSet.Include(tableName).AsNoTracking().Where(exp);
            }
            else
            {
                if (string.IsNullOrEmpty(tableName))
                    t = dbSet.Where(exp);
                else
                    t = dbSet.Include(tableName).Where(exp);
            }
            return t;
        }
        /// <summary>
        /// 4.0.2 查询方法
        /// </summary>
        /// <typeparam name="Tkey">如果strOrederBy为null Tkey也可以DBNull</typeparam>
        /// <param name="strWhere">查询条件</param>
        /// <param name="SelectDelData">查询的结果集中 是否包括 已经软删除的数据</param>
        /// <param name="strOrederBy">排序条件</param>
        /// <param name="order">是否升序</param>
        ///  <param name="tableName">连接查询 的表名</param>
        /// <returns></returns>
        public IQueryable<TEntity> GetList<Key>(Expression<Func<TEntity, bool>> strWhere, bool SelectDelData = false, bool isAsNoTracking = true, Expression<Func<TEntity, Key>> tableName = null)
        {
            Expression<Func<TEntity, bool>> exp = strWhere;
            //if (!SelectDelData)
            //    exp = AddLinq.And(exp, GetWhereIsDel());//合并 排除一删除查询条件

            IQueryable<TEntity> t = null;
            if (isAsNoTracking)
                if (null == tableName)
                    t = dbSet.AsNoTracking().Where(exp);
                else
                    t = dbSet.Include(tableName).AsNoTracking().Where(exp);
            else
                if (null == tableName)
                    t = dbSet.Where(exp);
                else
                    t = dbSet.Include(tableName).Where(exp);

            return t;
        }

        #endregion
        #region 4.1 查询方法2 分页查询 +GetList<Tkey>(int indexPage, int sizePage, Expression<Func<Tclass, bool>> strWhere, Expression<Func<Tclass, Tkey>> strOrederBy = null, bool order = true)
        /// <summary>
        /// 4.1 查询方法2 分页查询
        /// </summary>
        /// <typeparam name="Tkey">如果strOrederBy为null Tkey也可以DBNull</typeparam>
        /// <param name="indexPage">页码(从1开始）</param>
        /// <param name="sizePage">页容量</param>
        /// <param name="total">总页数</param>
        /// <param name="strWhere">查询条件</param>
        /// <param name="SelectDelData">查询的结果集中 是否包括 已经软删除的数据</param>
        /// <param name="strOrederBy">排序字段</param>
        /// <param name="order">是否升序</param>
        ///  <param name="tableName">连接查询 的表名</param>
        /// <returns></returns>
        public IQueryable<TEntity> GetList<Tkey>(int indexPage, int sizePage, out int total, Expression<Func<TEntity, bool>> strWhere, bool SelectDelData = false, Expression<Func<TEntity, Tkey>> strOrederBy = null, bool order = true, bool isAsNoTracking = true, string tableName = null)
        {
            Expression<Func<TEntity, bool>> exp = strWhere;
            //if (!SelectDelData)
            //    exp = AddLinq.And(exp, GetWhereIsDel());//合并 排除一删除查询条件

            IQueryable<TEntity> t = null;
            if (isAsNoTracking)
                if (string.IsNullOrEmpty(tableName))
                    t = dbSet.AsNoTracking().Where(exp);
                else
                    t = dbSet.Include(tableName).AsNoTracking().Where(exp);
            else
                if (string.IsNullOrEmpty(tableName))
                    t = dbSet.Where(exp);
                else
                    t = dbSet.Include(tableName).Where(exp);

            if (strOrederBy != null)
            {
                if (order)
                    t = t.OrderBy(strOrederBy);
                else
                    t = t.OrderByDescending(strOrederBy);
            }
            int count = t.Count();
            total = count / sizePage + (count % sizePage > 0 ? 1 : 0);
            return t.Skip((indexPage - 1) * sizePage).Take(sizePage);
        }

        /// <summary>
        /// 4.1.2 查询方法2 分页查询
        /// </summary>
        /// <typeparam name="Tkey">如果strOrederBy为null Tkey也可以DBNull</typeparam>
        /// <param name="indexPage">页码(从1开始）</param>
        /// <param name="sizePage">页容量</param>
        /// <param name="total">总页数</param>
        /// <param name="strWhere">查询条件</param>
        /// <param name="SelectDelData">查询的结果集中 是否包括 已经软删除的数据</param>
        /// <param name="strOrederBy">排序字段</param>
        /// <param name="order">是否升序</param>
        ///  <param name="tableName">连接查询 的表名</param>
        /// <returns></returns>
        public IQueryable<TEntity> GetList<Tkey, TTb>(int indexPage, int sizePage, out int total, Expression<Func<TEntity, bool>> strWhere, bool SelectDelData = false, Expression<Func<TEntity, Tkey>> strOrederBy = null, bool order = true, bool isAsNoTracking = true, Expression<Func<TEntity, TTb>> tableName = null)
        {
            Expression<Func<TEntity, bool>> exp = strWhere;
            //if (!SelectDelData)
            //    exp = AddLinq.And(exp, GetWhereIsDel());//合并 排除一删除查询条件

            IQueryable<TEntity> t = null;
            if (isAsNoTracking)
                if (null == tableName)
                    t = dbSet.AsNoTracking().Where(exp);
                else
                    t = dbSet.Include(tableName).AsNoTracking().Where(exp);
            else
                if (null == tableName)
                    t = dbSet.Where(exp);
                else
                    t = dbSet.Include(tableName).Where(exp);

            if (strOrederBy != null)
            {
                if (order)
                    t = t.OrderBy(strOrederBy);
                else
                    t = t.OrderByDescending(strOrederBy);
            }
            int count = t.Count();
            total = count / sizePage + (count % sizePage > 0 ? 1 : 0);
            
            return t.Skip((indexPage - 1) * sizePage).Take(sizePage);
        }


        #endregion

        public virtual TEntity GetByID(object id)
        {
            return dbSet.Find(id);
        }

        public virtual void Insert(TEntity entity)
        {
            dbSet.Add(entity);
        }

        public virtual void Delete(object id)
        {
            TEntity entityToDelete = dbSet.Find(id);
            Delete(entityToDelete);
        }

        public virtual void Delete(TEntity entityToDelete)
        {
            if (context.Entry(entityToDelete).State == EntityState.Detached)
            {
                dbSet.Attach(entityToDelete);
            }
            dbSet.Remove(entityToDelete);
        }

        public virtual void Update(TEntity entityToUpdate)
        {
            dbSet.Attach(entityToUpdate);
            context.Entry(entityToUpdate).State = EntityState.Modified;
        }


        /// <summary>
        /// 有跟踪状态
        /// </summary>
        /// <param name="query">SQL查询语句，注意ORCALE参数以:为标记，MS SQL以@为标记</param>
        /// <param name="parameters">参数</param>
        /// <returns></returns>
        public virtual IEnumerable<TEntity> GetWithRawSql(string query, params object[] parameters)
        {
            return dbSet.SqlQuery(query, parameters).ToList();
        }

        //
        /// <summary>
        /// 没有跟踪状态
        /// </summary>
        /// <param name="query"></param>
        /// <param name="parameters"></param>
        /// <returns></returns>
        public virtual IEnumerable<TEntity> GetwhithdbSql(string query, params object[] parameters)
        {
            return context.Database.SqlQuery<TEntity>(query, parameters);
        }

        /// <summary>
        /// 获取单行数据，多用于统计
        /// </summary>
        /// <param name="query"></param>
        /// <param name="parameters"></param>
        /// <returns></returns>
        public virtual TEntity GetwhithdbSqlSingle(string query, params object[] parameters)
        {
            return context.Database.SqlQuery<TEntity>(query, parameters).FirstOrDefault();
        }
    }
}