asp.net做的考勤系统

asp.net做的考勤系统 using System; using System.Collections.Generic; using System.Linq; using System.Text; using DataAccess; using System.Data; namespace Business_Logic { public class ClassSystemlg { /// <summary> /// 逻辑层存在验证 /// </summary> /// <param name="ClassID">班级编号</param> /// <param name="ClassName">班级名称</param>