标签:style ase namespace catch get query 提交 选择 .text
1.创建EF模型库
创建类库--》添加新建项--》选择ADO.NET实体数据模型--》选择 来自数据库的EF选择器--》配置数据库链接以及相应的数据库--》看底部(将app.Config中链接设置另存为)默认值改成你需要空间名(DemoEntity)--》实体框架6.X--》选择相应的表--》模型命名空间;改成你需要的空间名:(Demo.EntityModel),点击完成
2.创建实现类库
引用刚刚的EF实体库
3.添加相应的NuGet包:搜索:EntityFramework
点击安装;
4.开始操作EF模型库
using EntityModel; using System; using System.Collections.Generic; using System.Data.Entity; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Transactions; namespace EntityFrameworkDB { class DB { public static void Add() { using (var dbContext = new DemoEntity()) { var awardPool = new GXL_AwardPool() { ShopId = 2 }; dbContext.GXL_AwardPool.Add(awardPool); dbContext.SaveChanges(); } } public static void Update() { using (var dbContext = new DemoEntity()) { var awardPool = new GXL_AwardPool() { ID = 1, ShopId = 2 }; dbContext.GXL_AwardPool.Attach(awardPool); dbContext.Entry(awardPool).State = EntityState.Modified; dbContext.SaveChanges(); } } public static void Del() { using (var dbContext = new DemoEntity()) { var awardPool = new GXL_AwardPool() { ID = 1 }; dbContext.GXL_AwardPool.Attach(awardPool); dbContext.GXL_AwardPool.Remove(awardPool); dbContext.SaveChanges(); } } public static void GetModel() { using (var dbContext = new DemoEntity()) { //查询单个实体 var awardPool = dbContext.GXL_AwardPool.FirstOrDefault(x => x.ID == 1); //查询多个实体 var awardPoolList = dbContext.GXL_AwardPool.Where(x => x.ShopId == 1).ToList(); //通过sql语句查询单个实体 //dbContext.Database.SqlQuery<ShopsMyDto>(sql).FirstOrDefault(); //通过sql语句查谒多个实体 //dbContext.GXL_AwardPool.Where(x => x.ShopId == 1).ToList(); } } /// <summary> /// 提交事务 /// </summary> public static void Tijiao() { using (var dbContext = new DemoEntity()) { using (var scope = new TransactionScope()) { try { var awardPool = new GXL_AwardPool() { ShopId = 2 }; dbContext.GXL_AwardPool.Add(awardPool); var awardPoolIn = new GXL_AwardPoolIn() { ID = 1, ShopId = 2 }; dbContext.GXL_AwardPoolIn.Attach(awardPoolIn); dbContext.Entry(awardPoolIn).State = EntityState.Modified; //进行事务提交 dbContext.SaveChanges(); scope.Complete(); } catch { } } } } } }
标签:style ase namespace catch get query 提交 选择 .text
原文地址:http://www.cnblogs.com/wangbin0582/p/7396764.html