23、ASP.NET MVC入门到精通——业务层和数据层父类及接口-T4模板
本系列目录： ASP.NET MVC4入门到精通系列目录汇总
在上一篇中，我们已经把项目的基本框架搭起来了，这一篇我们就来实现业务层和数据层的父接口及父类。
1 、我们先来定义一个业务层父接口 IBaseBLL.cs
using System; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Text; using System.Threading.Tasks; namespace IBLL { /// <summary> /// 业务父 接口 /// </summary> /// <typeparam name="T"></typeparam> public interface IBaseBLL<T> where T:class,new() { //定义 增删改查 方法 #region 1.0 新增 实体 +int Add(T model) /// <summary> /// 新增 实体 /// </summary> /// <param name="model"></param> /// <returns></returns> int Add(T model); #endregion #region 2.0 根据 id 删除 +int Del(T model) /// <summary> /// 根据 id 删除 /// </summary> /// <param name="model">包含要删除id的对象</param> /// <returns></returns> int Del(T model); #endregion #region 3.0 根据条件删除 +int DelBy(Expression<Func<T, bool>> delWhere) /// <summary> /// 3.0 根据条件删除 /// </summary> /// <param name="delWhere"></param> /// <returns></returns> int DelBy(Expression<Func<T, bool>> delWhere); #endregion #region 4.0 修改 +int Modify(T model, params string[] proNames) /// <summary> /// 4.0 修改，如： /// T u = new T() { uId = 1, uLoginName = "asdfasdf" }; /// this.Modify(u, "uLoginName"); /// </summary> /// <param name="model">要修改的实体对象</param> /// <param name="proNames">要修改的 属性 名称</param> /// <returns></returns> int Modify(T model, params string[] proNames); #endregion #region 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames) /// <summary> /// 4.0 批量修改 /// </summary> /// <param name="model">要修改的实体对象</param> /// <param name="whereLambda">查询条件</param> /// <param name="proNames">要修改的 属性 名称</param> /// <returns></returns> int ModifyBy(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames); #endregion #region 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda) /// <summary> /// 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda) /// </summary> /// <param name="whereLambda"></param> /// <returns></returns> List<T> GetListBy(Expression<Func<T, bool>> whereLambda); #endregion #region 5.1 根据条件 排序 和查询 + List<T> GetListBy<TKey> /// <summary> /// 5.1 根据条件 排序 和查询 /// </summary> /// <typeparam name="TKey">排序字段类型</typeparam> /// <param name="whereLambda">查询条件 lambda表达式</param> /// <param name="orderLambda">排序条件 lambda表达式</param> /// <returns></returns> List<T> GetListBy<TKey>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderLambda); #endregion #region 6.0 分页查询 + List<T> GetPagedList<TKey> /// <summary> /// 6.0 分页查询 + List<T> GetPagedList<TKey> /// </summary> /// <param name="pageIndex">页码</param> /// <param name="pageSize">页容量</param> /// <param name="whereLambda">条件 lambda表达式</param> /// <param name="orderBy">排序 lambda表达式</param> /// <returns></returns> List<T> GetPagedList<TKey>(int pageIndex, int pageSize, Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderBy); #endregion } } View Code 2 、定义一个数据层父接口 IBaseDAL.cs
using System; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Text; using System.Threading.Tasks; namespace IDAL { /// <summary> /// 数据层父接口 /// </summary> public interface IBaseDAL<T> where T:class ,new() { //定义增删改查方法 #region 1.0 新增 实体 +int Add(T model) /// <summary> /// 新增 实体 /// </summary> /// <param name="model"></param> /// <returns></returns> int Add(T model); #endregion #region 2.0 根据 id 删除 +int Del(T model) /// <summary> /// 根据 id 删除 /// </summary> /// <param name="model">包含要删除id的对象</param> /// <returns></returns> int Del(T model); #endregion #region 3.0 根据条件删除 +int DelBy(Expression<Func<T, bool>> delWhere) /// <summary> /// 3.0 根据条件删除 /// </summary> /// <param name="delWhere"></param> /// <returns></returns> int DelBy(Expression<Func<T, bool>> delWhere); #endregion #region 4.0 修改 +int Modify(T model, params string[] proNames) /// <summary> /// 4.0 修改，如： /// T u = new T() { uId = 1, uLoginName = "asdfasdf" }; /// this.Modify(u, "uLoginName"); /// </summary> /// <param name="model">要修改的实体对象</param> /// <param name="proNames">要修改的 属性 名称</param> /// <returns></returns> int Modify(T model, params string[] proNames); #endregion #region 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames) /// <summary> /// 4.0 批量修改 /// </summary> /// <param name="model">要修改的实体对象</param> /// <param name="whereLambda">查询条件</param> /// <param name="proNames">要修改的 属性 名称</param> /// <returns></returns> int ModifyBy(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames); #endregion #region 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda) /// <summary> /// 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda) /// </summary> /// <param name="whereLambda"></param> /// <returns></returns> List<T> GetListBy(Expression<Func<T, bool>> whereLambda); #endregion #region 5.1 根据条件 排序 和查询 + List<T> GetListBy<TKey> /// <summary> /// 5.1 根据条件 排序 和查询 /// </summary> /// <typeparam name="TKey">排序字段类型</typeparam> /// <param name="whereLambda">查询条件 lambda表达式</param> /// <param name="orderLambda">排序条件 lambda表达式</param> /// <returns></returns> List<T> GetListBy<TKey>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderLambda); #endregion #region 6.0 分页查询 + List<T> GetPagedList<TKey> /// <summary> /// 6.0 分页查询 + List<T> GetPagedList<TKey> /// </summary> /// <param name="pageIndex">页码</param> /// <param name="pageSize">页容量</param> /// <param name="whereLambda">条件 lambda表达式</param> /// <param name="orderBy">排序 lambda表达式</param> /// <returns></returns> List<T> GetPagedList<TKey>(int pageIndex, int pageSize, Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderBy); #endregion } } View Code 3、我们数据库中有许多的表，通常每一张表都对应一个业务实体，如果我们每一个业务实体类都自己去手写的话，太浪费时间了，我们可以使用T4模板，简化这些枯燥的操作，提高我们的开发效率。
新建一个文本模板
然后把以下代码复制上去，
<#@ template language="C#" debug="false" hostspecific="true"#> <#@ include file="EF.Utility.CS.ttinclude"#><#@ output extension=".cs"#> <# CodeGenerationTools code = new CodeGenerationTools(this); MetadataLoader loader = new MetadataLoader(this); CodeRegion region = new CodeRegion(this, 1); MetadataTools ef = new MetadataTools(this); string inputFile = @"../MODEL/OA.edmx"; EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile); string namespaceName = code.VsNamespaceSuggestion(); EntityFrameworkTemplateFileManager fileManager = EntityFrameworkTemplateFileManager.Create(this); #> using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace IBLL { <# // Emit Entity Types foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name)) { //fileManager.StartNewFile(entity.Name + "RepositoryExt.cs"); //BeginNamespace(namespaceName, code); #> public partial interface I<#=entity.Name#>BLL : IBaseBLL<Model.<#=entity.Name#>> { } <#}#> } View Code 按Ctrl+S 自动生成代码 ，自动生成的IBLL.cs如下：
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace IBLL { public partial interface IBill_LeaveBLL : IBaseBLL<Model.Bill_Leave> { } public partial interface IoldWF_AutoTransactNodeBLL : IBaseBLL<Model.oldWF_AutoTransactNode> { } public partial interface IoldWF_BillFlowNodeBLL : IBaseBLL<Model.oldWF_BillFlowNode> { } public partial interface IoldWF_BillFlowNodeRemarkBLL : IBaseBLL<Model.oldWF_BillFlowNodeRemark> { } public partial interface IoldWF_BillStateBLL : IBaseBLL<Model.oldWF_BillState> { } public partial interface IoldWF_NodeBLL : IBaseBLL<Model.oldWF_Node> { } public partial interface IoldWF_NodeStateBLL : IBaseBLL<Model.oldWF_NodeState> { } public partial interface IoldWF_WorkFlowBLL : IBaseBLL<Model.oldWF_WorkFlow> { } public partial interface IoldWF_WorkFlowNodeBLL : IBaseBLL<Model.oldWF_WorkFlowNode> { } public partial interface IOu_DepartmentBLL : IBaseBLL<Model.Ou_Department> { } public partial interface IOu_PermissionBLL : IBaseBLL<Model.Ou_Permission> { } public partial interface IOu_RoleBLL : IBaseBLL<Model.Ou_Role> { } public partial interface IOu_RolePermissionBLL : IBaseBLL<Model.Ou_RolePermission> { } public partial interface IOu_UserInfoBLL : IBaseBLL<Model.Ou_UserInfo> { } public partial interface IOu_UserRoleBLL : IBaseBLL<Model.Ou_UserRole> { } public partial interface IOu_UserVipPermissionBLL : IBaseBLL<Model.Ou_UserVipPermission> { } public partial interface IW_WorkFlowBLL : IBaseBLL<Model.W_WorkFlow> { } public partial interface IW_WorkFlowBranchBLL : IBaseBLL<Model.W_WorkFlowBranch> { } public partial interface IW_WorkFlowNodeBLL : IBaseBLL<Model.W_WorkFlowNode> { } public partial interface IW_WrokFlowRoleBLL : IBaseBLL<Model.W_WrokFlowRole> { } public partial interface IWR_WorkFlowApplyBLL : IBaseBLL<Model.WR_WorkFlowApply> { } public partial interface IWR_WrokFlowApplyDetailsBLL : IBaseBLL<Model.WR_WrokFlowApplyDetails> { } } View Code 4、把IBLL.tt拷贝到IDAL项目下，然后修改命名空间为IDAL，修改接口声明模板
namespace IDAL public partial interface I<#=entity.Name#>DAL : IBaseDAL<Model.<#=entity.Name#>>
按Ctrl+S 自动生成代码，自动生成的IDAL.cs如下：
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace IDAL { public partial interface IBill_LeaveDAL : IBaseDAL<Model.Bill_Leave> { } public partial interface IoldWF_AutoTransactNodeDAL : IBaseDAL<Model.oldWF_AutoTransactNode> { } public partial interface IoldWF_BillFlowNodeDAL : IBaseDAL<Model.oldWF_BillFlowNode> { } public partial interface IoldWF_BillFlowNodeRemarkDAL : IBaseDAL<Model.oldWF_BillFlowNodeRemark> { } public partial interface IoldWF_BillStateDAL : IBaseDAL<Model.oldWF_BillState> { } public partial interface IoldWF_NodeDAL : IBaseDAL<Model.oldWF_Node> { } public partial interface IoldWF_NodeStateDAL : IBaseDAL<Model.oldWF_NodeState> { } public partial interface IoldWF_WorkFlowDAL : IBaseDAL<Model.oldWF_WorkFlow> { } public partial interface IoldWF_WorkFlowNodeDAL : IBaseDAL<Model.oldWF_WorkFlowNode> { } public partial interface IOu_DepartmentDAL : IBaseDAL<Model.Ou_Department> { } public partial interface IOu_PermissionDAL : IBaseDAL<Model.Ou_Permission> { } public partial interface IOu_RoleDAL : IBaseDAL<Model.Ou_Role> { } public partial interface IOu_RolePermissionDAL : IBaseDAL<Model.Ou_RolePermission> { } public partial interface IOu_UserInfoDAL : IBaseDAL<Model.Ou_UserInfo> { } public partial interface IOu_UserRoleDAL : IBaseDAL<Model.Ou_UserRole> { } public partial interface IOu_UserVipPermissionDAL : IBaseDAL<Model.Ou_UserVipPermission> { } public partial interface IW_WorkFlowDAL : IBaseDAL<Model.W_WorkFlow> { } public partial interface IW_WorkFlowBranchDAL : IBaseDAL<Model.W_WorkFlowBranch> { } public partial interface IW_WorkFlowNodeDAL : IBaseDAL<Model.W_WorkFlowNode> { } public partial interface IW_WrokFlowRoleDAL : IBaseDAL<Model.W_WrokFlowRole> { } public partial interface IWR_WorkFlowApplyDAL : IBaseDAL<Model.WR_WorkFlowApply> { } public partial interface IWR_WrokFlowApplyDetailsDAL : IBaseDAL<Model.WR_WrokFlowApplyDetails> { } } View Code 注意，我这里生成的所有接口都是 partial 类型的，这样我以后可以很方便的进行扩展
关于T4模板的使用不在本篇所讲的范畴，有兴趣的朋友，可以查找相关资料学习，我这里只做简要说明。
<#@ include file="EF.Utility.CS.ttinclude"#>：引入微软的生成框架
<#@ output extension=".cs"#>：指定生成的文件类型为.cs文件
string inputFile = @"../MODEL/OA.edmx"：这里使用相对路径指向我们新建的ADO.NET实体数据模型文件。
5、添加数据层的父类 BaseDAL.cs
前面数据层接口和业务层接口都已经添加好了，那么现在来添加数据层类和业务层类
在DAL 项目中添加 EntityFramework.dll 和 System.Data.Entity.dll 的引用
using System; using System.Collections.Generic; using System.Data.Entity; using System.Data.Entity.Infrastructure; using System.Linq; using System.Linq.Expressions; using System.Reflection; using System.Text; using Model; namespace DAL { /// <summary> /// 数据层 父类 /// </summary> /// <typeparam name="T"></typeparam> public class BaseDAL<T> : IDAL.IBaseDAL<T> where T : class,new() { /// <summary> /// EF上下文对象 /// </summary> DbContext db = new OAEntities(); //new DBContextFactory().GetDbContext();// #region 1.0 新增 实体 +int Add(T model) /// <summary> /// 新增 实体 /// </summary> /// <param name="model"></param> /// <returns></returns> public int Add(T model) { db.Set<T>().Add(model); return db.SaveChanges();//保存成功后，会将自增的id设置给 model的 主键属性，并返回受影响行数 } #endregion #region 2.0 根据 id 删除 +int Del(T model) /// <summary> /// 根据 id 删除 /// </summary> /// <param name="model">包含要删除id的对象</param> /// <returns></returns> public int Del(T model) { db.Set<T>().Attach(model); db.Set<T>().Remove(model); return db.SaveChanges(); } #endregion #region 3.0 根据条件删除 +int DelBy(Expression<Func<T, bool>> delWhere) /// <summary> /// 3.0 根据条件删除 /// </summary> /// <param name="delWhere"></param> /// <returns></returns> public int DelBy(Expression<Func<T, bool>> delWhere) { //3.1查询要删除的数据 List<T> listDeleting = db.Set<T>().Where(delWhere).ToList(); //3.2将要删除的数据 用删除方法添加到 EF 容器中 listDeleting.ForEach(u => { db.Set<T>().Attach(u);//先附加到 EF容器 db.Set<T>().Remove(u);//标识为 删除 状态 }); //3.3一次性 生成sql语句到数据库执行删除 return db.SaveChanges(); } #endregion #region 4.0 修改 +int Modify(T model, params string[] proNames) /// <summary> /// 4.0 修改，如： /// T u = new T() { uId = 1, uLoginName = "asdfasdf" }; /// this.Modify(u, "uLoginName"); /// </summary> /// <param name="model">要修改的实体对象</param> /// <param name="proNames">要修改的 属性 名称</param> /// <returns></returns> public int Modify(T model, params string[] proNames) { //4.1将 对象 添加到 EF中 DbEntityEntry entry = db.Entry<T>(model); //4.2先设置 对象的包装 状态为 Unchanged entry.State = System.Data.EntityState.Unchanged; //4.3循环 被修改的属性名 数组 foreach (string proName in proNames) { //4.4将每个 被修改的属性的状态 设置为已修改状态;后面生成update语句时，就只为已修改的属性 更新 entry.Property(proName).IsModified = true; } //4.4一次性 生成sql语句到数据库执行 return db.SaveChanges(); } #endregion #region 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames) /// <summary> /// 4.0 批量修改 /// </summary> /// <param name="model">要修改的实体对象</param> /// <param name="whereLambda">查询条件</param> /// <param name="proNames">要修改的 属性 名称</param> /// <returns></returns> public int ModifyBy(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames) { //4.1查询要修改的数据 List<T> listModifing = db.Set<T>().Where(whereLambda).ToList(); //获取 实体类 类型对象 Type t = typeof(T); // model.GetType(); //获取 实体类 所有的 公有属性 List<PropertyInfo> proInfos = t.GetProperties(BindingFlags.Instance | BindingFlags.Public).ToList(); //创建 实体属性 字典集合 Dictionary<string, PropertyInfo> dictPros = new Dictionary<string, PropertyInfo>(); //将 实体属性 中要修改的属性名 添加到 字典集合中 键：属性名 值：属性对象 proInfos.ForEach(p => { if (modifiedProNames.Contains(p.Name)) { dictPros.Add(p.Name, p); } }); //4.3循环 要修改的属性名 foreach (string proName in modifiedProNames) { //判断 要修改的属性名是否在 实体类的属性集合中存在 if (dictPros.ContainsKey(proName)) { //如果存在，则取出要修改的 属性对象 PropertyInfo proInfo = dictPros[proName]; //取出 要修改的值 object newValue = proInfo.GetValue(model, null); //object newValue = model.uName; //4.4批量设置 要修改 对象的 属性 foreach (T usrO in listModifing) { //为 要修改的对象 的 要修改的属性 设置新的值 proInfo.SetValue(usrO, newValue, null); //usrO.uName = newValue; } } } //4.4一次性 生成sql语句到数据库执行 return db.SaveChanges(); } #endregion #region 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda) /// <summary> /// 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda) /// </summary> /// <param name="whereLambda"></param> /// <returns></returns> public List<T> GetListBy(Expression<Func<T, bool>> whereLambda) { return db.Set<T>().Where(whereLambda).ToList(); } #endregion #region 5.1 根据条件 排序 和查询 + List<T> GetListBy<TKey> /// <summary> /// 5.1 根据条件 排序 和查询 /// </summary> /// <typeparam name="TKey">排序字段类型</typeparam> /// <param name="whereLambda">查询条件 lambda表达式</param> /// <param name="orderLambda">排序条件 lambda表达式</param> /// <returns></returns> public List<T> GetListBy<TKey>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderLambda) { return db.Set<T>().Where(whereLambda).OrderBy(orderLambda).ToList(); } #endregion #region 6.0 分页查询 + List<T> GetPagedList<TKey> /// <summary> /// 6.0 分页查询 + List<T> GetPagedList<TKey> /// </summary> /// <param name="pageIndex">页码</param> /// <param name="pageSize">页容量</param> /// <param name="whereLambda">条件 lambda表达式</param> /// <param name="orderBy">排序 lambda表达式</param> /// <returns></returns> public List<T> GetPagedList<TKey>(int pageIndex, int pageSize, Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderBy) { // 分页 一定注意： Skip 之前一定要 OrderBy return db.Set<T>().Where(whereLambda).OrderBy(orderBy).Skip((pageIndex - 1) * pageSize).Take(pageSize).ToList(); } #endregion } } View Code 6、拷贝IDAL.tt到DAL项目中，改名为DAL.tt，然后修改T4模板
按Ctrl+S 自动生成代码，自动生成的DAL.cs如下：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using IDAL; namespace DAL { public partial class Bill_LeaveDAL : BaseDAL<Model.Bill_Leave>,IBill_LeaveDAL { } public partial class oldWF_AutoTransactNodeDAL : BaseDAL<Model.oldWF_AutoTransactNode>,IoldWF_AutoTransactNodeDAL { } public partial class oldWF_BillFlowNodeDAL : BaseDAL<Model.oldWF_BillFlowNode>,IoldWF_BillFlowNodeDAL { } public partial class oldWF_BillFlowNodeRemarkDAL : BaseDAL<Model.oldWF_BillFlowNodeRemark>,IoldWF_BillFlowNodeRemarkDAL { } public partial class oldWF_BillStateDAL : BaseDAL<Model.oldWF_BillState>,IoldWF_BillStateDAL { } public partial class oldWF_NodeDAL : BaseDAL<Model.oldWF_Node>,IoldWF_NodeDAL { } public partial class oldWF_NodeStateDAL : BaseDAL<Model.oldWF_NodeState>,IoldWF_NodeStateDAL { } public partial class oldWF_WorkFlowDAL : BaseDAL<Model.oldWF_WorkFlow>,IoldWF_WorkFlowDAL { } public partial class oldWF_WorkFlowNodeDAL : BaseDAL<Model.oldWF_WorkFlowNode>,IoldWF_WorkFlowNodeDAL { } public partial class Ou_DepartmentDAL : BaseDAL<Model.Ou_Department>,IOu_DepartmentDAL { } public partial class Ou_PermissionDAL : BaseDAL<Model.Ou_Permission>,IOu_PermissionDAL { } public partial class Ou_RoleDAL : BaseDAL<Model.Ou_Role>,IOu_RoleDAL { } public partial class Ou_RolePermissionDAL : BaseDAL<Model.Ou_RolePermission>,IOu_RolePermissionDAL { } public partial class Ou_UserInfoDAL : BaseDAL<Model.Ou_UserInfo>,IOu_UserInfoDAL { } public partial class Ou_UserRoleDAL : BaseDAL<Model.Ou_UserRole>,IOu_UserRoleDAL { } public partial class Ou_UserVipPermissionDAL : BaseDAL<Model.Ou_UserVipPermission>,IOu_UserVipPermissionDAL { } public partial class W_WorkFlowDAL : BaseDAL<Model.W_WorkFlow>,IW_WorkFlowDAL { } public partial class W_WorkFlowBranchDAL : BaseDAL<Model.W_WorkFlowBranch>,IW_WorkFlowBranchDAL { } public partial class W_WorkFlowNodeDAL : BaseDAL<Model.W_WorkFlowNode>,IW_WorkFlowNodeDAL { } public partial class W_WrokFlowRoleDAL : BaseDAL<Model.W_WrokFlowRole>,IW_WrokFlowRoleDAL { } public partial class WR_WorkFlowApplyDAL : BaseDAL<Model.WR_WorkFlowApply>,IWR_WorkFlowApplyDAL { } public partial class WR_WrokFlowApplyDetailsDAL : BaseDAL<Model.WR_WrokFlowApplyDetails>,IWR_WrokFlowApplyDetailsDAL { } } View Code 7、添加业务层的父类BaseBLL.cs
using System; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Text; using System.Reflection; namespace BLL { /// <summary> /// 业务层父类 /// </summary> /// <typeparam name="T"></typeparam> public abstract class BaseBLL<T> : IBLL.IBaseBLL<T> where T : class,new() { public BaseBLL() { SetDAL(); } //1.数据层接口 对象 - 等待 被实例化 protected IDAL.IBaseDAL<T> idal;// = new idal.BaseDAL(); /// <summary> /// 由子类实现，为 业务父类 里的 数据接口对象 设置 值！ /// </summary> public abstract void SetDAL(); //2.增删改查方法 #region 1.0 新增 实体 +int Add(T model) /// <summary> /// 新增 实体 /// </summary> /// <param name="model"></param> /// <returns></returns> public int Add(T model) { return idal.Add(model); } #endregion #region 2。0 根据 用户 id 删除 +int Del(int uId) /// <summary> /// 根据 用户 id 删除 /// </summary> /// <param name="uId"></param> /// <returns></returns> public int Del(T model) { return idal.Del(model); } #endregion #region 3.0 根据条件删除 +int DelBy(Expression<Func<T, bool>> delWhere) /// <summary> /// 3.0 根据条件删除 /// </summary> /// <param name="delWhere"></param> /// <returns></returns> public int DelBy(Expression<Func<T, bool>> delWhere) { return idal.DelBy(delWhere); } #endregion #region 4.0 修改 +int Modify(T model, params string[] proNames) /// <summary> /// 4.0 修改，如： /// </summary> /// <param name="model">要修改的实体对象</param> /// <param name="proNames">要修改的 属性 名称</param> /// <returns></returns> public int Modify(T model, params string[] proNames) { return idal.Modify(model, proNames); } #endregion #region 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames) /// <summary> /// 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames) /// </summary> /// <param name="model"></param> /// <param name="whereLambda"></param> /// <param name="modifiedProNames"></param> /// <returns></returns> public int ModifyBy(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames) { return idal.ModifyBy(model, whereLambda, modifiedProNames); } #endregion #region 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda) /// <summary> /// 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda) /// </summary> /// <param name="whereLambda"></param> /// <returns></returns> public List<T> GetListBy(Expression<Func<T, bool>> whereLambda) { return idal.GetListBy(whereLambda); } #endregion #region 5.1 根据条件 排序 和查询 + List<T> GetListBy<TKey> /// <summary> /// 5.1 根据条件 排序 和查询 /// </summary> /// <typeparam name="TKey">排序字段类型</typeparam> /// <param name="whereLambda">查询条件 lambda表达式</param> /// <param name="orderLambda">排序条件 lambda表达式</param> /// <returns></returns> public List<T> GetListBy<TKey>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderLambda) { return idal.GetListBy(whereLambda, orderLambda); } #endregion #region 6.0 分页查询 + List<T> GetPagedList<TKey> /// <summary> /// 6.0 分页查询 + List<T> GetPagedList<TKey> /// </summary> /// <param name="pageIndex">页码</param> /// <param name="pageSize">页容量</param> /// <param name="whereLambda">条件 lambda表达式</param> /// <param name="orderBy">排序 lambda表达式</param> /// <returns></returns> public List<T> GetPagedList<TKey>(int pageIndex, int pageSize, Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderBy) { return idal.GetPagedList(pageIndex, pageSize, whereLambda, orderBy); } #endregion } } View Code 8、同样的拷贝IBLL.tt到BLL项目下，重命名为BLL.tt，然后修改T4模板，按Ctrl+S 自动生成代码，自动生成的BLL.cs如下：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using IBLL; namespace BLL { public partial class Bill_LeaveBLL : BaseBLL<Model.Bill_Leave>,IBill_LeaveBLL { } public partial class oldWF_AutoTransactNodeBLL : BaseBLL<Model.oldWF_AutoTransactNode>,IoldWF_AutoTransactNodeBLL { } public partial class oldWF_BillFlowNodeBLL : BaseBLL<Model.oldWF_BillFlowNode>,IoldWF_BillFlowNodeBLL { } public partial class oldWF_BillFlowNodeRemarkBLL : BaseBLL<Model.oldWF_BillFlowNodeRemark>,IoldWF_BillFlowNodeRemarkBLL { } public partial class oldWF_BillStateBLL : BaseBLL<Model.oldWF_BillState>,IoldWF_BillStateBLL { } public partial class oldWF_NodeBLL : BaseBLL<Model.oldWF_Node>,IoldWF_NodeBLL { } public partial class oldWF_NodeStateBLL : BaseBLL<Model.oldWF_NodeState>,IoldWF_NodeStateBLL { } public partial class oldWF_WorkFlowBLL : BaseBLL<Model.oldWF_WorkFlow>,IoldWF_WorkFlowBLL { } public partial class oldWF_WorkFlowNodeBLL : BaseBLL<Model.oldWF_WorkFlowNode>,IoldWF_WorkFlowNodeBLL { } public partial class Ou_DepartmentBLL : BaseBLL<Model.Ou_Department>,IOu_DepartmentBLL { } public partial class Ou_PermissionBLL : BaseBLL<Model.Ou_Permission>,IOu_PermissionBLL { } public partial class Ou_RoleBLL : BaseBLL<Model.Ou_Role>,IOu_RoleBLL { } public partial class Ou_RolePermissionBLL : BaseBLL<Model.Ou_RolePermission>,IOu_RolePermissionBLL { } public partial class Ou_UserInfoBLL : BaseBLL<Model.Ou_UserInfo>,IOu_UserInfoBLL { } public partial class Ou_UserRoleBLL : BaseBLL<Model.Ou_UserRole>,IOu_UserRoleBLL { } public partial class Ou_UserVipPermissionBLL : BaseBLL<Model.Ou_UserVipPermission>,IOu_UserVipPermissionBLL { } public partial class W_WorkFlowBLL : BaseBLL<Model.W_WorkFlow>,IW_WorkFlowBLL { } public partial class W_WorkFlowBranchBLL : BaseBLL<Model.W_WorkFlowBranch>,IW_WorkFlowBranchBLL { } public partial class W_WorkFlowNodeBLL : BaseBLL<Model.W_WorkFlowNode>,IW_WorkFlowNodeBLL { } public partial class W_WrokFlowRoleBLL : BaseBLL<Model.W_WrokFlowRole>,IW_WrokFlowRoleBLL { } public partial class WR_WorkFlowApplyBLL : BaseBLL<Model.WR_WorkFlowApply>,IWR_WorkFlowApplyBLL { } public partial class WR_WrokFlowApplyDetailsBLL : BaseBLL<Model.WR_WrokFlowApplyDetails>,IWR_WrokFlowApplyDetailsBLL { } } View Code 到此，业务父类、业务类、数据父类、数据类都已经创建好了，里面有些东西还需要优化的，后续一步一步完善。
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666
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文章和留言都翻到11页了 没有OOM
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朋友，翻页到11页，及以后，会出现OOM，无法访问
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版本号是多少，你可以下载哪个代码仓库，jdk选1.8 直接跑就行
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