OA2021/DAL/InvitationLetterService.cs

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

namespace DAL
{
    public class InvitationLetterService
    {
        List<Position> excuteSql(string sql, params SqlParameter[] param)
        {
            return ServiceBase<Position>.excuteSql(new Position(), "Position", sql, CommandType.Text, param);
        }
        Position excuteType(string sql, params SqlParameter[] param)
        {
            //查询结果放入对象集合
            List<Position> hdList = excuteSql(sql, param);
            //判断集合是否为空
            if (hdList == null || hdList.Count == 0)
                //返回null
                return null;
            //返回单个对象
            return hdList[0];
        }

        public List<Position> GetAllJobTitleCn()
        {
            return excuteSql("select * from Position where Isdel=0");
        }

        public Position GetAllByJobTitleCn(string JobTitleCn)
        {
            return excuteType("select * from Position where Isdel=0 and JobTitleCn='"+ JobTitleCn + "'");
        }
    }
}