jiandaservices.cs

在线考试系统完整版源码(C#&Access) 该考试系统为一同学毕业设计

using System;
using System.Collections.Generic;
using System.Text;
using System.Data.OleDb;
using System.Data;
using ExamModel.Auto_Generated_Code;

namespace ExamDAL.Auto_Generated_Code
{
    public class JiandaServices
    {
        //添加填空题
        public static int AddJiandaProblem(Jianda jdPro)
        {
            string sql = "insert into Jianda (CourseID,Title,Answer)" +
                       "values(@courseId,@Title,@answer)";
            try
            {
                OleDbParameter[] pare = new OleDbParameter[]
                {
                    new OleDbParameter("@courseId",jdPro.JCourse.CID),//FK
                    new OleDbParameter("@Title",jdPro.JTitle),
                    new OleDbParameter("@answer",jdPro.Janswer)
                };
                return DBHelp.ExecuteCommand(sql, pare);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                throw e;
            }

        }
        //更新简答题
        public static bool UpdateJiandaProblem(Jianda jdPro)
        {
            try
            {
                string sql1 = "update Jianda set CourseID=" + jdPro.JCourse.CID + ",Title='" + jdPro.JTitle  + "',Answer='" + jdPro.Janswer + "' where JiandaID=" + jdPro.JiandaID;
                DBHelp.ExecuteCommand(sql1);
                return true;
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                throw e;
            }

        }
        //通过ID删除
        public static bool DeleteJiandaById(int jdProid)
        {
            try
            {
                string sql = "Delete from Jianda where JiandaID=" + jdProid;
                DBHelp.ExecuteCommand(sql);
                return true;
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                throw e;
            }

        }

        //通过ID获得所有简答题
        public static DataTable GetAllJiandaProblemId(string id)
        {
            string OleDb = "select JiandaID from Jianda where CourseID=" + id.ToString();
            DataSet ds = DBHelp.GetDataSet(OleDb);
            return ds.Tables[0];
        }
        //获得所有简答题列表
        public static IList<Jianda> GetJudgeProblemByOleDb(string values, string id)
        {
            List<Jianda> list = new List<Jianda>();
            string oleDb = "select * from Jianda where JiandaID in (" + values + ") and CourseID=" + id;
            using (DataSet ds = DBHelp.GetDataSet(oleDb))
            {
                foreach (DataRow row in ds.Tables[0].Rows)
                {
                    Jianda jianda = new Jianda();
                    jianda.JiandaID = (int)row["JiandaID"];
                    jianda.JCourse = CourseService.GetCourseById((int)row["CourseID"]);
                    jianda.JTitle = (string)row["Title"];
                    jianda.Janswer = (string)row["Answer"];
                    list.Add(jianda);
                }
                return list;
            }
        }
        //通过科目名查询简答题题目
        public static DataSet GetJiandaByCourseName(Course course)
        {
            string sql = "select * from Jianda where CourseID=" + course.CID;
            return DBHelp.GetDataSet(sql);

        }
        //通过ID获得科目对象
        public static Jianda GetJiandaproblemById(int jdId)
        {
            string sql = "select * from Jianda where JiandaID=" + jdId;

            int courseId;
            try
            {
                OleDbDataReader reader = DBHelp.GetReader(sql);
                if (reader.Read())
                {
                    Jianda jd = new Jianda();
                    jd.JiandaID = (int)reader["JiandaID"];
                    jd.JTitle = (string)reader["Title"];
                    jd.Janswer = (string)reader["Answer"];
                    courseId = (int)reader["CourseID"];//FK
                    reader.Close();

                    jd.JCourse = CourseService.GetCourseById(courseId);
                    return jd;

                }
                else
                {
                    reader.Close();
                    return null;
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                throw e;
            }
        }
    }
}