cardlg.cpp

利用odbc编程实现以下功能： 航班

// cardlg.cpp : implementation file
//

#include "stdafx.h"
#include "dbexe.h"
#include "cardlg.h"
#include "carset.h"
#include "caradddlg.h"
#include "reservedlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// Ccardlg dialog


Ccardlg::Ccardlg(CWnd* pParent /*=NULL*/)
	: CDialog(Ccardlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(Ccardlg)
	m_field = _T("");
	m_relation = _T("");
	m_content = _T("");
	//}}AFX_DATA_INIT
}


void Ccardlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(Ccardlg)
	DDX_Control(pDX, IDC_LIST1, m_basic);
	DDX_CBString(pDX, IDC_COMBO1, m_field);
	DDX_CBString(pDX, IDC_COMBO2, m_relation);
	DDX_CBString(pDX, IDC_COMBO3, m_content);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(Ccardlg, CDialog)
	//{{AFX_MSG_MAP(Ccardlg)
	ON_BN_CLICKED(IDC_INSERT, OnInsert)
	ON_BN_CLICKED(IDC_DELETE, OnDelete)
	ON_BN_CLICKED(IDC_UPDATA, OnUpdata)
	ON_NOTIFY(NM_CLICK, IDC_LIST1, OnClickList1)
	ON_BN_CLICKED(IDC_SELECT, OnSelect)
	ON_BN_CLICKED(IDC_RESERVE, OnReserve)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// Ccardlg message handlers
BOOL Ccardlg::OnInitDialog(void){
	CDialog::OnInitDialog();
	m_basic.InsertColumn(0,"地点");
    m_basic.InsertColumn(1,"价格");
	m_basic.InsertColumn(2,"汽车总数");
	m_basic.InsertColumn(3,"剩余汽车数");
	RECT rectbasic;
	m_basic.GetWindowRect(&rectbasic);
	int widbasic=rectbasic.right-rectbasic.left;
	m_basic.SetColumnWidth(0,widbasic/4);
	m_basic.SetColumnWidth(1,widbasic/4);
	m_basic.SetColumnWidth(2,widbasic/4);
	m_basic.SetColumnWidth(3,widbasic/4);
	m_basic.SetExtendedStyle(LVS_EX_FULLROWSELECT);
	p_query.Format("select* from cars");
	RefreshData();
	return true;
}

void Ccardlg::RefreshData()
{
if(!m_database.IsOpen()){
		m_database.Open(_T("database1"));
	}
m_basic.DeleteAllItems();
Ccarset m_basicset(&m_database);
CString strsql;
m_basicset.Open(AFX_DB_USE_DEFAULT_TYPE,p_query);
CDBVariant varValue;
if(m_basicset.GetRecordCount()!=0)
  m_basicset.MoveFirst();
else MessageBox("没有您需要的内容");
    char buf[20];
    int i=0;
	while(!m_basicset.IsEOF())
	{   int temp=0;
		m_basicset.GetFieldValue(temp,varValue);
		m_basic.InsertItem(i,varValue.m_pstring->GetBuffer(1));//插入元组
		m_basicset.GetFieldValue(1,varValue);
		sprintf(buf,"%d",varValue.m_lVal); m_basic.SetItemText(i,1,buf);
		m_basicset.GetFieldValue(2,varValue);
		sprintf(buf,"%d",varValue.m_lVal); m_basic.SetItemText(i,2,buf);
		m_basicset.GetFieldValue(3,varValue);
		sprintf(buf,"%d",varValue.m_lVal); m_basic.SetItemText(i,3,buf);
		m_basicset.MoveNext();
		i++;
	}
}

void Ccardlg::OnInsert() 
{
  m_database.Close();
  Ccaradddlg m_adddlg;
  m_adddlg.DoModal();
  RefreshData();	// TODO: Add your control notification handler code here
	
}

void Ccardlg::OnDelete() 
{
    int i=m_basic.GetHotItem();
		CString strSQL;
		if(i==-1){
			MessageBox("please choose a record first!");
		}
		else{
			CString keyid=m_basic.GetItemText(i,0);
			strSQL.Format("delete from cars where location='"+keyid+"'");//删除元组
			m_database.ExecuteSQL(strSQL);
			m_database.Close();
			RefreshData();
		}	// TODO: Add your control notification handler code here
	
}

void Ccardlg::OnUpdata() 
{
	int i=m_basic.GetHotItem();
	if(i==-1){
			MessageBox("please choose a record first!");
		}
	else{
	CString strSQL;
	Ccaradddlg m_caradd;
    m_caradd.m_location=m_basic.GetItemText(i,0);
	m_caradd.m_price=atoi(m_basic.GetItemText(i,1));
	m_caradd.m_carnum=atoi(m_basic.GetItemText(i,2));
    m_caradd.m_caravail=atoi(m_basic.GetItemText(i,3));
    strSQL.Format("delete from cars where location='"+m_caradd.m_location+"'");
    m_database.ExecuteSQL(strSQL);
    m_caradd.DoModal();
	Sleep(500);
	RefreshData();
	}// TODO: Add your control notification handler code here
	
}

void Ccardlg::OnClickList1(NMHDR* pNMHDR, LRESULT* pResult) 
{
	int i=m_basic.GetSelectionMark();
	CString strSQL;
	if(i==-1){
		MessageBox("please choose a record first!");
	}
	else{
		car_id=m_basic.GetItemText(i,0);
		m_basic.SetHotItem(i);
	}// TODO: Add your control notification handler code here
	
	//*pResult = 0;
}

void Ccardlg::OnSelect() 
{
	UpdateData(TRUE);
	CString m_realfield;
	if(!m_field.Compare("地点")){
		m_realfield.Format("location");
		p_query.Format("select * from cars where %s%s'%s'",m_realfield,m_relation,m_content);
	}
	if(!m_field.Compare("价格")){
		m_realfield.Format("price");
		p_query.Format("select * from cars where %s%s%d",m_realfield,m_relation,atoi(m_content));
	}
	if(!m_field.Compare("总汽车数")){
		
		m_realfield.Format("numcars");
		p_query.Format("select * from cars where %s%s%d",m_realfield,m_relation,atoi(m_content));
	}
	if(!m_field.Compare("剩余汽车数")){
		
		m_realfield.Format("numavail");
		p_query.Format("select * from cars where %s%s%d",m_realfield,m_relation,atoi(m_content));
	}
	
	RefreshData();	// TODO: Add your control notification handler code here
	
}

void Ccardlg::OnReserve() 
{
	Creservedlg m_reserve;
	int i=m_basic.GetHotItem();
	if(i==-1){
			MessageBox("please choose a record first!");
		}
	else{
	m_reserve.customname=customname;
	m_reserve.reservetype=3;
	m_reserve.reservekey=m_basic.GetItemText(i,0);
	CString strsql;
	if(!m_database.IsOpen()){
		m_database.Open(_T("database1"));
	}
	int newnumavail=atoi(m_basic.GetItemText(i,3))-1;
	strsql.Format("update cars set numavail=%d where location='"+m_reserve.reservekey+"'",newnumavail);
	m_database.ExecuteSQL(strsql);
	RefreshData();
	m_reserve.insert();
	MessageBox("您已经预定了一辆汽车,若想取消您的预定内容,请到预定信息栏中取消");
	}
	// TODO: Add your control notification handler code here
	
}

void Ccardlg::unreserve()
{

if(!m_database.IsOpen()){
		m_database.Open(_T("database1"));
	}
//strsql.Format("update cars set numavail=%d where location='"+key+"'",numavail+1);
Ccarset m_basicset(&m_database);
CString strsql;
p_query.Format("select * from cars where location='"+key+"'");
m_basicset.Open(AFX_DB_USE_DEFAULT_TYPE,p_query);
CDBVariant varValue;
m_basicset.MoveFirst();
         int temp=0;
		m_basicset.GetFieldValue(temp,varValue);
	    CString location=varValue.m_pstring->GetBuffer(1);//
		m_basicset.GetFieldValue(1,varValue);
		int price=varValue.m_lVal;
		m_basicset.GetFieldValue(2,varValue);
		int carnum=varValue.m_lVal;
		m_basicset.GetFieldValue(3,varValue);
		int numavail=varValue.m_lVal+1;
strsql.Format("delete from cars where location='%s'",key);
m_database.ExecuteSQL(strsql);
strsql.Format("insert into cars values(\'%s\',%d,%d,%d)",location,price,carnum,numavail);
m_database.ExecuteSQL(strsql);
}