dclasstempcourse.cs

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		#region 查询实体集合
		/// <summary>
        /// 根据查询对象构建过滤条件查询
        /// </summary>
        /// <param name="searcher">查询对象</param>
        /// <returns>实体类对象列表</returns>
        public ArrayList Select(ClassTempCourseSearcher searcher)
        {
            ArrayList entities = new ArrayList();
			string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
			using(SqlConnection conn=new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
					entities = Select(cmd,searcher);
				}
            }
			return entities;
        }
		/// <summary>
        /// 使用事务并且依据查询对象构建过滤条件查询
        /// </summary>
		/// <param name="connection">实现共享Command的对象</param>
        /// <param name="searcher">查询对象</param>
        /// <returns>实体类对象列表</returns>
        public ArrayList Select(IConnection connection, ClassTempCourseSearcher searcher)
        {
		    SqlCommand cmd=connection.Command as SqlCommand;
            return Select(cmd,searcher);
        }
		public ArrayList Select(SqlCommand command,ClassTempCourseSearcher searcher)
		{
		    string condition=string.Empty;
		    command.Parameters.Clear();
			ArrayList entities = new ArrayList();
		    if(searcher.ClassTempCourseIDIsValid)
			{
			    condition += " and Class_TempCourse_ID=@Class_TempCourse_ID_C";
			    command.Parameters.Add(new SqlParameter("@Class_TempCourse_ID_C",searcher.ClassTempCourseID));
		    }
		    if(searcher.ClassIDIsValid)
			{
			    condition += " and Class_ID=@Class_ID_C";
			    command.Parameters.Add(new SqlParameter("@Class_ID_C",searcher.ClassID));
		    }
		    if(searcher.TempCourseIDIsValid)
			{
			    condition += " and TempCourse_ID=@TempCourse_ID_C";
			    command.Parameters.Add(new SqlParameter("@TempCourse_ID_C",searcher.TempCourseID));
		    }
		    if(searcher.TempCourseDateIsValid)
			{
			    condition += " and TempCourse_Date=@TempCourse_Date_C";
			    command.Parameters.Add(new SqlParameter("@TempCourse_Date_C",searcher.TempCourseDate));
		    }
		    if(searcher.IsAmIsValid)
			{
			    condition += " and IsAm=@IsAm_C";
			    command.Parameters.Add(new SqlParameter("@IsAm_C",searcher.IsAm));
		    }
		    if(searcher.LessonHourIsValid)
			{
			    condition += " and Lesson_Hour=@Lesson_Hour_C";
			    command.Parameters.Add(new SqlParameter("@Lesson_Hour_C",searcher.LessonHour));
		    }
		    if(searcher.IsFrontIsValid)
			{
			    condition += " and Is_Front=@Is_Front_C";
			    command.Parameters.Add(new SqlParameter("@Is_Front_C",searcher.IsFront));
		    }
		    if(searcher.TeacherIDIsValid)
			{
			    condition += " and Teacher_ID=@Teacher_ID_C";
			    command.Parameters.Add(new SqlParameter("@Teacher_ID_C",searcher.TeacherID));
		    }
			if(condition != string.Empty)
			{
				condition=" where"+condition.Substring(4);
			}
			
            command.CommandText = "select * from ClassTempCourse"+condition;
            return ExcuteSelectCommand(command);
		}
		/// <summary>
        /// 执行Command获取对象列表
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <returns>实体类对象列表</returns>
        private ArrayList ExcuteSelectCommand(SqlCommand cmd)
        {
            ArrayList entities = new ArrayList();
            using (SqlDataReader dr = cmd.ExecuteReader())
            {
                while (dr.Read())
                {
                    ClassTempCourse  entity = DataReaderToEntity(dr);
                    entities.Add(entity);
                }
            }
			SetForeignKeyEntity(cmd, ref entities);
			return entities;
        }
		private void SetForeignKeyEntity(SqlCommand command, ref ArrayList entities)
		{
		    //由外键获取相关实体
			DTempCourse dTempCourse=new DTempCourse();
			DClass dClass=new DClass();
			DEmployee dEmployee=new DEmployee();
			foreach(ClassTempCourse  entity in entities)
			{
	            entity.TempCourse = dTempCourse.SelectSingle(command,entity.TempCourseID);
	            entity.Class = dClass.SelectSingle(command,entity.ClassID);
	            entity.Employee = dEmployee.SelectSingle(command,entity.TeacherID);
			}
		}
        /// <summary>
        /// 查询所有实体
        /// </summary>
        /// <returns>实体类对象列表</returns>
        public ArrayList Select()
        {
            ArrayList entities = new ArrayList();
			string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
			using(SqlConnection conn=new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    cmd.CommandText = "select * from ClassTempCourse";
                    entities=ExcuteSelectCommand(cmd);
                }
                return entities;
            }
        }
		/// <summary>
        /// 使用事务查询查询所有实体
        /// </summary>
		/// <param name="connection">实现共享Command的对象</param>
        /// <param name="searcher">查询对象</param>
        /// <returns>实体类对象列表</returns>
        public ArrayList Select(IConnection connection)
        {
            ArrayList entities = new ArrayList();
            SqlCommand cmd=connection.Command as SqlCommand;
			cmd.Parameters.Clear();
            cmd.CommandText = "select * from ClassTempCourse";
            return ExcuteSelectCommand(cmd);
        }
		#endregion
		
		#region 查询单个实体
		/// <summary>
        /// 按主键字段查询特定实体
        /// </summary>
        /// <param name="pkValue">主键值</param>
        /// <returns>实体类对象</returns>
        public ClassTempCourse SelectSingle(object pkValue)
        {
		    ClassTempCourse entity=null;
			string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
			using(SqlConnection conn=new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    entity=SelectSingle(cmd,pkValue);
                }   
            } 
			return entity;
        }
		
		/// <summary>
        /// 使用事务并按主键字段查询特定实体
        /// </summary>
        /// <param name="pkValue">主键值</param>
        /// <returns>实体类对象</returns>
        public ClassTempCourse SelectSingle(IConnection connection,object pkValue)
        {
		    SqlCommand cmd=connection.Command as SqlCommand;
			return SelectSingle(cmd,pkValue);
            
        }
		public ClassTempCourse SelectSingle(SqlCommand command,object pkValue)
		{
		    ClassTempCourse entity=null;
		    command.Parameters.Clear();
		    command.CommandText = "select * from ClassTempCourse where Class_TempCourse_ID=@pk";
			command.Parameters.Add(new SqlParameter("@pk",pkValue));
			using (SqlDataReader dr = command.ExecuteReader())
            {
			    if(dr.Read())
				    entity = DataReaderToEntity(dr);
			}
						
			//由外键获取相关实体
			DTempCourse dTempCourse=new DTempCourse();
			DClass dClass=new DClass();
			DEmployee dEmployee=new DEmployee();
	        entity.TempCourse = dTempCourse.SelectSingle(command,entity.TempCourseID);
	        entity.Class = dClass.SelectSingle(command,entity.ClassID);
	        entity.Employee = dEmployee.SelectSingle(command,entity.TeacherID);
            return entity;
		}
		#endregion
		
				
		/// <summary>
        /// 从DataReader中取出值生成实体对象
        /// </summary>
        /// <param name="searcher">查询对象</param>
        /// <returns>过滤条件字符串</returns>
		private ClassTempCourse DataReaderToEntity(SqlDataReader dr)
		{
		    ClassTempCourse entity = new ClassTempCourse ();
			if(dr["Class_TempCourse_ID"]!=System.DBNull.Value)
			{
			    entity.ClassTempCourseID=Convert.ToInt32(dr["Class_TempCourse_ID"]);
			}
			if(dr["Class_ID"]!=System.DBNull.Value)
			{
			    entity.ClassID=Convert.ToInt32(dr["Class_ID"]);
			}
			if(dr["TempCourse_ID"]!=System.DBNull.Value)
			{
			    entity.TempCourseID=Convert.ToInt32(dr["TempCourse_ID"]);
			}
			if(dr["TempCourse_Date"]!=System.DBNull.Value)
			{
			    entity.TempCourseDate=Convert.ToDateTime(dr["TempCourse_Date"]);
			}
			if(dr["IsAm"]!=System.DBNull.Value)
			{
			    entity.IsAm=Convert.ToBoolean(dr["IsAm"]);
			}
			if(dr["Lesson_Hour"]!=System.DBNull.Value)
			{
			    entity.LessonHour=Convert.ToInt32(dr["Lesson_Hour"]);
			}
			if(dr["Is_Front"]!=System.DBNull.Value)
			{
			    entity.IsFront=Convert.ToBoolean(dr["Is_Front"]);
			}
			if(dr["Teacher_ID"]!=System.DBNull.Value)
			{
			    entity.TeacherID=Convert.ToInt32(dr["Teacher_ID"]);
			}
			return entity;
		}
	}
}