通过T4模板实现代码自动生成

1:准备.tt模板

 
using BBFJ.OA.IBLL;
using BBFJ.OA.IDAL;
using BBFJ.OA.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BBFJ.OA.BLL
{
    
    public partial class ActionInfoService :BaseService<ActionInfo>,IActionInfoService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.ActionInfoDal;
        }
    }   
    
    public partial class DepartmentService :BaseService<Department>,IDepartmentService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.DepartmentDal;
        }
    }   
    
    public partial class R_UserInfo_ActionInfoService :BaseService<R_UserInfo_ActionInfo>,IR_UserInfo_ActionInfoService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.R_UserInfo_ActionInfoDal;
        }
    }   
    
    public partial class RoleInfoService :BaseService<RoleInfo>,IRoleInfoService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.RoleInfoDal;
        }
    }   
    
    public partial class UserInfoService :BaseService<UserInfo>,IUserInfoService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.UserInfoDal;
        }
    }   
    
}

注意修改.tt模板中的

string inputFile = @"..\BBFJ.OA.Model\Model.edmx";

和

using BBFJ.OA.IBLL;
using BBFJ.OA.IDAL;
using BBFJ.OA.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BBFJ.OA.BLL

3: 修改原类的属性为部分类 partial

public partial class UserInfoService : BaseService<UserInfo>,IUserInfoService

并注释掉重复内容

using BBFJ.OA.IBLL;
using BBFJ.OA.IDAL;
using BBFJ.OA.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BBFJ.OA.BLL
{
   public partial  class UserInfoService : BaseService<UserInfo>,IUserInfoService
    {
        //public override void SetCurrentDal()
        //{
        //   //子类拿到父类的CurrentDal属性
        //    //子类拿到父类的DBSession属性
        //    CurrentDal = this.CurrentDBSession.UserInfoDal;
        //}
        #region 02批量删除
        public bool DeleteEntities(List<int> list)
        {
            //拿到父类的DBSession属性,拿到具体的数据操作类,调用查询方法
            var userInfoList = this.CurrentDBSession.UserInfoDal.LoadEntities(u=>list.Contains(u.ID));
            foreach (var userInfo in userInfoList)
            {
                this.CurrentDBSession.UserInfoDal.DeleteEntity(userInfo);
            }
            return this.CurrentDBSession.SaveChanges();
        }
        #endregion

        #region 03完成用户信息的搜索
        public IQueryable<UserInfo> LoadSearchEntities(Model.Search.UserInfoSearch userInfoSearch,short delFlag)
        {
            var temp = this.CurrentDBSession.UserInfoDal.LoadEntities(c=>c.DelFlag == delFlag );
            //根据用户名搜索
            if (!String.IsNullOrEmpty(userInfoSearch.UserName))
            {
                temp = temp.Where<UserInfo>(u=>u.UName.Contains(userInfoSearch.UserName));
            }
            if (!String.IsNullOrEmpty(userInfoSearch.UserRemark))
            {
                temp = temp.Where<UserInfo>(u => u.Remark.Contains(userInfoSearch.UserRemark));
            }
            userInfoSearch.TotalCount = temp.Count();
            return temp.OrderBy<UserInfo, int>(u => u.ID).Skip<UserInfo>((userInfoSearch.PageIndex - 1) * userInfoSearch.PageSize).Take<UserInfo>(userInfoSearch.PageSize);
        }
        #endregion
        
    }
}

4: 常见的错误:

修改方法 public partial class UserInfoService : BaseService<UserInfo>,IUserInfoService 类前加"partial" 关键字

 

注释到重复方法 

 最终生成代码

 
using BBFJ.OA.IBLL;
using BBFJ.OA.IDAL;
using BBFJ.OA.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BBFJ.OA.BLL
{
    
    public partial class ActionInfoService :BaseService<ActionInfo>,IActionInfoService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.ActionInfoDal;
        }
    }   
    
    public partial class DepartmentService :BaseService<Department>,IDepartmentService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.DepartmentDal;
        }
    }   
    
    public partial class R_UserInfo_ActionInfoService :BaseService<R_UserInfo_ActionInfo>,IR_UserInfo_ActionInfoService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.R_UserInfo_ActionInfoDal;
        }
    }   
    
    public partial class RoleInfoService :BaseService<RoleInfo>,IRoleInfoService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.RoleInfoDal;
        }
    }   
    
    public partial class UserInfoService :BaseService<UserInfo>,IUserInfoService
    {
    

         public override void SetCurrentDal()
        {
            CurrentDal = this.CurrentDBSession.UserInfoDal;
        }
    }   
    
}