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[assembly: EdmSchemaAttribute()]
namespace EfStydu
{#region 上下文/// <summary>/// 没有元数据文档可用。/// </summary>public partial class EntityStudyEntities : ObjectContext{#region 构造函数/// <summary>/// 请使用应用<span href="tag.php?name=%B3%CC%D0%F2" οnclick="tagshow(event)" class="t_tag">程序</span>配置文件的“EntityStudyEntities”部分中的连接字符串初始化新 EntityStudyEntities 对象。/// </summary>public EntityStudyEntities() : base("name=EntityStudyEntities", "EntityStudyEntities"){this.ContextOptions.LazyLoadingEnabled = true;OnContextCreated();}/// <summary>/// 初始化新的 EntityStudyEntities 对象。/// </summary>public EntityStudyEntities(string connectionString) : base(connectionString, "EntityStudyEntities"){this.ContextOptions.LazyLoadingEnabled = true;OnContextCreated();}/// <summary>/// 初始化新的 EntityStudyEntities 对象。/// </summary>public EntityStudyEntities(EntityConnection connection) : base(connection, "EntityStudyEntities"){this.ContextOptions.LazyLoadingEnabled = true;OnContextCreated();}#endregion#region 分部方法partial void OnContextCreated();#endregion#region ObjectSet 属性/// <summary>/// 没有元数据文档可用。/// </summary>public ObjectSet<User> User集{get{if ((_User集 == null)){_User集 = base.CreateObjectSet<User>("User集");}return _User集;}}private ObjectSet<User> _User集;#endregion#region AddTo 方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace EfStydu
{class Program{static void Main(string[] args){//创建一个上下文EntityStudyEntities est = new EntityStudyEntities();//插入一个用户实体User u = new User();u.AddTime = DateTime.Now.ToString();u.Name = "xiamai";//告诉上下文 我要往user表里面添加记录est.User集.AddObject(u);//命令上下文 将实体映射到表里面est.SaveChanges();}}
}

            //修改实体User um = new User();um.AddTime = DateTime.Now.ToString();um.ID = 3;um.Name = "xiamai123";um.Class = "1";//将实体附加到上下文 进行管理est.User集.Attach(um);//设计管理器的实体状态为修改est.ObjectStateManager.ChangeObjectState(um, System.Data.EntityState.Modified);//映射命令est.SaveChanges();