v1.0.0

CC.Yi.BLL/BaseBll.cs

@@ -0,0 +1,87 @@
+using CC.Yi.DALFactory;
+using CC.Yi.IBLL;
+using CC.Yi.IDAL;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+
+namespace CC.Yi.BLL
+{
+    public class BaseBll<T> : IBaseBll<T> where T : class, new()
+    {
+        public IBaseDal<T> CurrentDal;
+        public BaseBll(IBaseDal<T> cd)
+        {
+            CurrentDal = cd;
+        }
+        //public abstract void SetCurrentDal();
+        //public BaseBll()//基类的构造方法
+        //{
+        //    SetCurrentDal();//该方法由子类去实现
+        //}
+
+        public IQueryable<T> GetEntities(Expression<Func<T, bool>> whereLambda)
+        {
+            return CurrentDal.GetEntities(whereLambda);
+        }
+
+        public int GetCount(Expression<Func<T, bool>> whereLambda) //统计数量
+        {
+            return CurrentDal.GetCount(whereLambda);
+        }
+
+        public IQueryable<IGrouping<S, T>> GetGroup<S>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, S>> groupByLambda) //分组
+        {
+            return CurrentDal.GetGroup(whereLambda, groupByLambda);
+
+        }
+
+
+        public IQueryable<T> GetPageEntities<S>(int pageSize, int pageIndex, out int total, Expression<Func<T, bool>> whereLambda, Expression<Func<T, S>> orderByLambda, bool isAsc)
+        {
+            return CurrentDal.GetPageEntities(pageSize, pageIndex, out total, whereLambda, orderByLambda, isAsc);
+        }
+
+        public T Add(T entity)
+        {
+            CurrentDal.Add(entity);
+            DbSession.SaveChanges();
+            return entity;
+        }
+
+        public bool Update(T entity)
+        {
+            CurrentDal.Update(entity);
+            return DbSession.SaveChanges() > 0;
+        }
+
+        public bool Delete(T entity)
+        {
+            CurrentDal.Delete(entity);
+            return DbSession.SaveChanges() > 0;
+        }
+        public IDbSession DbSession
+        {
+            get
+            {
+                return DbSessionFactory.GetCurrentDbSession();
+            }
+        }
+        public bool Delete(int id)
+        {
+            CurrentDal.Detete(id);
+            return DbSession.SaveChanges() > 0;
+        }
+
+        public int DeleteList(List<int> ids)
+        {
+            foreach (var id in ids)
+            {
+                CurrentDal.Detete(id);
+            }
+            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
+        }
+
+    }
+}