88 lines
2.4 KiB
C#
88 lines
2.4 KiB
C#
using CC.Yi.DALFactory;
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using CC.Yi.IBLL;
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using CC.Yi.IDAL;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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namespace CC.Yi.BLL
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{
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public class BaseBll<T> : IBaseBll<T> where T : class, new()
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{
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public IBaseDal<T> CurrentDal;
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public BaseBll(IBaseDal<T> cd)
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{
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CurrentDal = cd;
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}
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//public abstract void SetCurrentDal();
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//public BaseBll()//基类的构造方法
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//{
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// SetCurrentDal();//该方法由子类去实现
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//}
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public IQueryable<T> GetEntities(Expression<Func<T, bool>> whereLambda)
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{
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return CurrentDal.GetEntities(whereLambda);
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}
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public int GetCount(Expression<Func<T, bool>> whereLambda) //统计数量
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{
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return CurrentDal.GetCount(whereLambda);
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}
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public IQueryable<IGrouping<S, T>> GetGroup<S>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, S>> groupByLambda) //分组
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{
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return CurrentDal.GetGroup(whereLambda, groupByLambda);
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}
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public IQueryable<T> GetPageEntities<S>(int pageSize, int pageIndex, out int total, Expression<Func<T, bool>> whereLambda, Expression<Func<T, S>> orderByLambda, bool isAsc)
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{
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return CurrentDal.GetPageEntities(pageSize, pageIndex, out total, whereLambda, orderByLambda, isAsc);
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}
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public T Add(T entity)
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{
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CurrentDal.Add(entity);
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DbSession.SaveChanges();
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return entity;
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}
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public bool Update(T entity)
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{
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CurrentDal.Update(entity);
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return DbSession.SaveChanges() > 0;
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}
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public bool Delete(T entity)
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{
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CurrentDal.Delete(entity);
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return DbSession.SaveChanges() > 0;
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}
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public IDbSession DbSession
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{
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get
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{
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return DbSessionFactory.GetCurrentDbSession();
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}
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}
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public bool Delete(int id)
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{
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CurrentDal.Detete(id);
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return DbSession.SaveChanges() > 0;
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}
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public int DeleteList(List<int> ids)
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{
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foreach (var id in ids)
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{
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CurrentDal.Detete(id);
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}
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return DbSession.SaveChanges();//这里把SaveChanges方法提到了循环体外，自然就与数据库交互一次
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}
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}
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}
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