v1.0.0

CC.Yi.BLL/BaseBll.cs

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+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
+        }
+
+    }
+}

CC.Yi.BLL/CC.Yi.BLL.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\CC.Yi.DALFactory\CC.Yi.DALFactory.csproj" />
+    <ProjectReference Include="..\CC.Yi.IBLL\CC.Yi.IBLL.csproj" />
+    <ProjectReference Include="..\CC.Yi.IDAL\CC.Yi.IDAL.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="T4BLL.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>T4BLL.cs</LastGenOutput>
+    </None>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Service Include="{508349b6-6b84-4df5-91f0-309beebad82d}" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Update="T4BLL.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>T4BLL.tt</DependentUpon>
+    </Compile>
+  </ItemGroup>
+
+</Project>

CC.Yi.BLL/T4BLL.cs

@@ -0,0 +1,19 @@
+
+using CC.Yi.IBLL;
+using CC.Yi.IDAL;
+using CC.Yi.Model;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CC.Yi.BLL
+{
+    public partial class studentBll : BaseBll<student>, IstudentBll
+        {
+            public studentBll(IBaseDal<student> cd):base(cd)
+            {
+                CurrentDal = cd;
+            }
+        }
+}

CC.Yi.BLL/T4BLL.tt

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+<#@ template debug="false" hostspecific="true" language="C#" #>
+<#@ assembly name="System.Core" #>
+<#@ import namespace="System.Linq" #>
+<#@ import namespace="System.Text" #>
+<#@ import namespace="System.Collections.Generic" #>
+<#@ import namespace="System.IO" #>
+<#@ output extension=".cs" #>
+<#
+    string solutionsPath = Host.ResolveAssemblyReference("$(SolutionDir)");//获取解决方案路径
+            string txt;
+            StreamReader sr = new StreamReader(solutionsPath+@"\T4Model\T4Model.txt");
+            txt=sr.ReadToEnd();
+            sr.Close();
+            string[] ModelData= txt.Split(',');
+ #>
+
+using CC.Yi.IBLL;
+using CC.Yi.IDAL;
+using CC.Yi.Model;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CC.Yi.BLL
+{
+<#    foreach(string k in ModelData){
+ #>
+    public partial class <#=k #>Bll : BaseBll<<#=k #>>, I<#=k #>Bll
+        {
+            public <#=k #>Bll(IBaseDal<<#=k #>> cd):base(cd)
+            {
+                CurrentDal = cd;
+            }
+        }
+<#    } #>
+}