ORM简单增删改查

 namespace ORM
 {
     class Program
     {
         static void Main(string[] args)
         {
             //AddPetStore();//添加
             UpdatePetStore();//修改
         }
         /// <summary>
         /// 添加
         /// </summary>
         private static void AddPetStore()
         {
             PetStore store = new PetStore()
             {
                 Name = "张三",
                 PassWord = "",
                 Balance =
             };
             using (CIM_CWEntities entities = new CIM_CWEntities())
             {
                 entities.PetStore.Add(store);
                 if (entities.SaveChanges() > )
                 {
                     Console.WriteLine("添加-成功");
                 }
             }
         }
         /// <summary>
         /// 修改
         /// </summary>
         /// <param name="storeId"></param>
         private static void UpdatePetStore(int storeId)
         {
             using (CIM_CWEntities entities = new CIM_CWEntities())
             {
                 //第一种修改
                 //PetStore store = entities.PetStore.FirstOrDefault(i => i.Id == storeId);//lambda表达式：用于简化委托和实例
                 //store.Name = "李四1";
                 //store.PassWord = "456";

                 //第二种修改
                 IQueryable<PetStore> store = entities.PetStore.Where(i => i.Id == storeId);//可以根据多条件修改
                 foreach (var item in store)
                 {
                     item.Name = "王维";
                     item.PassWord = "";
                 }
                 if (entities.SaveChanges() > )
                 {
                     Console.WriteLine("修改成功....");
                 }
             }
         }
         /// <summary>
         /// 批量修改成功
         /// </summary>
         /// <param name="typeId"></param>
         private static void EditPetStore(int typeId)
         {
             using (CIM_CWEntities entities = new CIM_CWEntities())
             {
                 var list = entities.PetStore.Where<PetStore>(i => i.Id == typeId).OrderByDescending(p => p.Id).ToList<PetStore>();
                 list[].Name = "李四";
                 list[].PassWord = "";
                 if (entities.SaveChanges() > )
                 {
                     Console.WriteLine("批量修改成功...");
                 }
             }
         }
         /// <summary>
         /// 删除
         /// </summary>
         /// <param name="storeid"></param>
         private static void RemovePetSotre(int storeid)
         {
             using (CIM_CWEntities entities = new CIM_CWEntities())
             {
                 PetStore petStore = entities.PetStore.Single<PetStore>(i => i.Id == storeid);
                 entities.PetStore.Remove(petStore);
                 if (entities.SaveChanges() > )
                 {
                     Console.WriteLine("删除成功...");
                 }
             }
         }
         /// <summary>
         /// linq查询
         /// </summary>
         private static void GetPetSotre()
         {
             using (CIM_CWEntities entities = new CIM_CWEntities())
             {
                 var pr = from a in entities.PetStore
                          join b in entities.Pet
                          on a.Id equals b.Store_Id
                          select new { a.Name, b.Love };
                 foreach (var item in pr)
                 {
                     Console.WriteLine($"名称：{item.Name}-爱好：{item.Love}");
                 }
             }
         }
         /// <summary>
         /// 添加方法
         /// </summary>
         /// <param name="pet"></param>
         private static void ExecuteNonQuery(PetStore pet)
         {
             using (CIM_CWEntities entities = new CIM_CWEntities())
             {
                 SqlParameter[] sqls = {
                     new SqlParameter("@name",pet.Name),
                     new SqlParameter ("@pwd",pet.PassWord),
                     new SqlParameter ("@banl",pet.Balance)
                 };
                 int result = entities.Database.ExecuteSqlCommand("insert into PetStore(Name,PassWord,Balance) values(@name,@pwd,@banl)", sqls);
                 if (result > )
                 {
                     Console.WriteLine("添加成功...");
                 }
             }
         }
         private static void ExecuteScalar()
         {
             int obj = ;
             using (CIM_CWEntities entities = new CIM_CWEntities())
             {
                 obj = entities.Database.SqlQuery<int>("select count(1) from PetStore").Single();//SQL所有查询，存储过程调用
             }
         }
         private static void ExecuteReader()
         {
             using (CIM_CWEntities entities = new CIM_CWEntities())
             {
                 List<PetStore> store = entities.Database.SqlQuery<PetStore>("select * from PetStore").ToList();
             }
         }
         private static void ExecuteProc()
         {
             using (CIM_CWEntities entities = new CIM_CWEntities())
             {
                 SqlParameter[] sqls =
                     {
                     new SqlParameter ("@typeId",),
                     new SqlParameter ("@count",System.Data.SqlDbType.Int)//输出参数int
                 };
                 sqls[].Direction = ParameterDirection.Output;
                 List<PetStore> stores = entities.Database.SqlQuery<PetStore>("proc_GetPetStore @typeId,@count output",sqls).ToList();

                 int count =(int)sqls[].Value;
             }
         }
     }
 }

ORM