DAL/GradeDal.cs

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Model;

namespace DAL
{
    public class GradeDal
    {

        StudentDataClassesDataContext db = new StudentDataClassesDataContext();
        /// <summary>
        /// 获取成绩表信息
        /// </summary>
        /// <returns></returns>
        public List<Model.Grade> GetGrade()
        {
            return db.Grade.ToList();
        }
        /// <summary>
        /// 修改学生分数信息
        /// </summary>
        /// <param name="stu"></param>
        /// <returns></returns>
        public bool UpdateGread(Model.Grade g)
        {
            try
            {
                var r = (from i in db.Grade
                         where i.gId == g.gId
                         select i).First();
                r.gScore = g.gScore;

                db.SubmitChanges();

                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }

        /// <summary>
        /// 删除学生成绩信息
        /// </summary>
        /// <param name="stuID"></param>
        /// <returns></returns>
        public bool DeleteGrade(int gId)
        {
            try
            {
                var result = (from i in db.Grade
                              where i.gId == gId
                              select i).First();
                db.Grade.DeleteOnSubmit(result);
                db.SubmitChanges();
                return true;
            }