DAL/CustomerManager.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.SQLite;
using Models;

namespace DAL
{
    public class CustomerManager
    {
        /// <summary>
        /// 获取所有顾客信息
        /// </summary>
        /// <returns></returns>
        public DataSet GetAllCustomerInfoDataSet()
        {
            string sql = "select * from tb_customerInfo";
            return SQLHelper.GetDataSet(sql, "allCustomerInfo");
        }





        /// <summary>
        /// 获取对应房间入住顾客信息
        /// </summary>
        /// <param name="roomNum">房号</param>
        /// <returns>返回入住顾客信息list</returns>
        public List<Customer> GetCustomerInfo(string roomNum)
        {
            string sql = string.Format("select 身份证号,姓名,性别,入住房号,入住时间,预住天数,押金 from tb_customerInfo where tb_customerInfo.入住房号='{0}'", roomNum);
            SQLiteDataReader rd = SQLHelper.GetReader(sql);
            List<Customer> list = new List<Customer>();
            while (rd.Read())
            {
                list.Add(new Customer { 
                    IDCardNum=rd["身份证号"].ToString(),
                    Name=rd["姓名"].ToString(),
                    Sex=rd["性别"].ToString(),
                    RoomNum=rd["入住房号"].ToString(),
                    BookedTime=rd["入住时间"].ToString(),
                    BookedDay=Convert.ToInt32(rd["预住天数"]),
                    Deposit=Convert.ToDouble(rd["押金"]),
                });
            }
            return list;
        }

        /// <summary>
        /// 通过房号获取顾客信息
        /// </summary>
        /// <param name="roomNum"></param>
        /// <returns></returns>
        public DataSet GetCustomerInfoByRoomNum(string roomNum)
        {
            string sql = string.Format("select * from tb_customerInfo where 入住房号='{0}'", roomNum);