App_Code/dao/BookTypeDao.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.Web;
using System.Data.SqlClient;

namespace BookMS
{
    public class BookTypeDao
    {
         //基本数据库连接类
        private Connect connect = new Connect();

        //添加Booktype到数据库
        public void AddBookType(BookType bookType) {
            string sql = "insert into booktype(name) values('"+bookType.Name+"')";
            connect.ExecuteSql(sql);
        }

        //根据ID从数据库中删除Booktype
        public void DeleteBookTypeById(int id)
        {
            string sql = "delete from booktype where id="+"'"+id+"'";
            connect.ExecuteSql(sql);
        }

       //更新Booktype信息
        public void UpdateBookType(BookType bookType)
        {
            string sql = "update booktype set name=" + "'" + bookType.Name + "'" + " where id=" + "'" + bookType.Id + "'";
            connect.ExecuteSql(sql);
        }

        //根据ID获取BookType
        public BookType GetBookTypeById(int id)
        {
            BookType bookType=new BookType();
            SqlDataReader reader = connect.CreateReader("select * from booktype where id=" + "'" + id + "'");
            if (reader.Read())
            {
                bookType.Id = Convert.ToInt32(reader["id"]);
                bookType.Name = (string)reader["name"];
            }
            reader.Close();
            return  bookType;
        }

        //根据Name获取BookType
        public BookType GetBookTypeByName(string name)
        {
            BookType bookType=new BookType();
            SqlDataReader reader = connect.CreateReader("select * from booktype where name=" + "'" + name + "'");
            if (reader.Read())
            {
                bookType.Id = Convert.ToInt32(reader["id"]);
                bookType.Name = (string)reader["name"];
            }
            reader.Close();
            return bookType;
        }