图书管理系统c++源代码

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1、usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Text;usingSystem.Windows.Forms;namespaceWindowsApplication1{publicpartialclassForm_BuyAndSale:Form{publicForm_BuyAndSale(){InitializeComponent();}SQLsql;stringl

2、astSQL="";publicvoidshow(){listBox1.Items.Clear();listBox2.Items.Clear();listBox3.Items.Clear();if(sql.rows.GetLength(0)!=0){for(inti=0;i

3、ws[i,2].ToString());}}else{listBox1.Text="";listBox2.Text="";listBox3.Text="";MessageBox.Show("无符合查询条件的结果!","提示");}}privatevoidForm_BuyAndSale_Load(objectsender,EventArgse){//将窗体的任务栏隐藏this.FormBorderStyle=System.Windows.Forms.FormBorderStyle.None;sql=newSQL(Form_load.connectionSt

4、ring);sql.ExecuteSQL("select*fromts_tushuxiaoshou");show();lastSQL="select*fromts_tushuxiaoshou";}privatevoidbutThisQuarter_Click(objectsender,EventArgse){intmonth=System.DateTime.Now.Month;intspace=(3-month%3)%3;stringmin=System.DateTime.Now.Year.ToString()+STR.add0(Convert.ToSt

5、ring(month+space-2))+"00";stringmax=System.DateTime.Now.Year.ToString()+STR.add0(Convert.ToString(month+space))+"99";sql.ExecuteSQL("select*fromts_tushuxiaoshouwheresaledate>'"+min+"'andsaledate<'"+max+"'");show();lastSQL="select*fromts_tushuxiaoshouwheresaledate>'"+min+"'andsale

6、date<'"+max+"'";}privatevoidbutThisYear_Click(objectsender,EventArgse){stringmin=System.DateTime.Now.Year.ToString()+"0000";stringmax=System.DateTime.Now.Year.ToString()+"9999";sql.ExecuteSQL("select*fromts_tushuxiaoshouwheresaledate>'"+min+"'andsaledate<'"+max+"'");show();lastSQ

7、L="select*fromts_tushuxiaoshouwheresaledate>'"+min+"'andsaledate<'"+max+"'";}privatevoidbutAll_Click(objectsender,EventArgse){sql.ExecuteSQL("select*fromts_tushuxiaoshou");show();lastSQL="select*fromts_tushuxiaoshou";}privatevoidbutSearch_Click(objectsender,EventArgse){try{int.Pa

8、rse(Min.Text);int.Parse(Max.Text);}catch