chosecountcname.cpp

教学管理系统

// ChoseCountCname.cpp : implementation file
//

#include "stdafx.h"
#include "COdbc.h"
#include "ChoseCountCname.h"
#include <afxdb.h>
#include "ChoseCourse.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CChoseCountCname dialog


CChoseCountCname::CChoseCountCname(CWnd* pParent /*=NULL*/)
	: CDialog(CChoseCountCname::IDD, pParent)
{
	//{{AFX_DATA_INIT(CChoseCountCname)
	m_result = _T("");
	m_coursename = _T("");
	//}}AFX_DATA_INIT
}


void CChoseCountCname::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CChoseCountCname)
	DDX_Text(pDX, IDC_EDIT2, m_result);
	DDX_Text(pDX, IDC_EDIT1, m_coursename);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CChoseCountCname, CDialog)
	//{{AFX_MSG_MAP(CChoseCountCname)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CChoseCountCname message handlers

void CChoseCountCname::OnOK() 
{
	// TODO: Add extra validation here
	CDatabase db;
	BOOL bRtn;
	CString sql,tmp;
	try {
	bRtn = db.OpenEx("DSN=教学管理系统;UID=sa", CDatabase::noOdbcDialog);
	}catch (CDBException *pDBEx) {
	pDBEx->ReportError();
	}catch (CMemoryException *pMemEx) {
	pMemEx->ReportError();
	}
	if (!bRtn)
	printf("连接数据库失败!");

	UpdateData(true);
	sql = "Select Count(*) from student_lesson,lesson \
		where student_lesson.lesson_id=lesson.lesson_id \
		and	lesson.lesson_name='";
	sql+=m_coursename;
	sql+="'";
	CChoseCourse rs(&db);
	try {
	bRtn = rs.Open(CRecordset::snapshot,sql);
	} catch(CDBException *pDBEx) {
	pDBEx->ReportError();
	} catch(CMemoryException *pMemEx) {
	pMemEx->ReportError();
	}
	if(!bRtn) {
	AfxMessageBox("Query table failed!",MB_OK|MB_ICONERROR);
	return ;
	}
	/* 4、逐条获取查询结果*/
	for(rs.MoveFirst();!rs.IsEOF();rs.MoveNext()) {
	// TODO: Add code here
	}
	/* 5、关闭记录集、数据库*/
	m_result=rs.m_student_id;
	UpdateData(false);
	rs.Close();
	db.Close();

}

void CChoseCountCname::OnCancel() 
{
	// TODO: Add extra cleanup here
	
	CDialog::OnCancel();
}