ZhongJianChen/Class_DuzheXinxiShanchu.cs

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using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;

namespace MF借书系统.ZhongJianChen
{
    class Class_DuzheXinxiShanchu
    {
        public string sqlSt = "select * from duzhe";
        ADO.SqlAdo sql;
        public Class_DuzheXinxiShanchu()
        { 
        
        }

        //判断读者信息是否存在
        public bool bool_Duzhe(string Tianjia, int i)
        {
            string sqlStr = "";
            if (i == 0)
            {
                sqlStr = "select duzheid as '读者id', duzhename as '读者姓名'," +
                "Kejie_number as '可借数量' , Moeny as '金额' from duzhe where duzheid = '" + Tianjia + "'";
            }
            else if (i == 1)
            {
                sqlStr = "select duzheid as '读者id', duzhename as '读者姓名'," +
                "Kejie_number as '可借数量' , Moeny as '金额' from duzhe where DuzheName = '" + Tianjia + "'";
            }
            sql = new ADO.SqlAdo();
            SqlDataReader read = sql.select(sqlStr);
            if (read.Read())
            {
                sqlSt = sqlStr;
                return true;
            }
            return false;
        }

        //显示单条数据
        public DataTable getDantiao()
        {
            ADO.AdoTable table = new ADO.AdoTable();
            return table.getTable(sqlSt).Tables[0];
        }

        //返回读者表的所有信息
        public DataTable getTable()
        {
            ADO.AdoTable table = new ADO.AdoTable();
            string sqlStr = "select duzheid as '读者id', duzhename as '读者姓名',"+
                "Kejie_number as '可借数量' , Moeny as '金额' from duzhe";
            return table.getTable(sqlStr).Tables[0];
        }

        //返回空白表格
        public DataSet getKongbai()
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