student.cs

本在线考试系统采用了面向对象的分析和设计

using System;
using System.Collections.Generic;
using System.Text;

namespace ExaminationSystem.BLL.Domain
{
    public class Student:User
    {

        private string studentID;

        public virtual string StudentID
        {
            get { return studentID; }
            set { studentID = value; }
        }
        public override string LoginName
        {
            get
            {
                return StudentID;
            }
            set
            {
               StudentID = value;
            }
        }
    
        public virtual Paper CurrentPaper
        {
            get 
            {
                foreach (Paper paper in Papers)
                {
                    if (paper.IsSubmited == false)
                        return paper;
                }
                return null;
            }
            set 
            {
                if (CurrentPaper != null)
                    throw new Exception("已经有了试卷");
                Papers.Add(value);
            }
        }

        private IList<Paper> papers = new List<Paper>();

        public virtual IList<Paper> Papers
        {
            get { return papers; }
            set { papers = value; }
        }

        private Class cls;

        public virtual Class Class
        {
            get { return cls; }
            set { cls = value; }
        }
        public override int GetHashCode()
        {
            return (GetType().FullName + "|" +
                StudentID).GetHashCode();
        }
    }
}