scdlg.cpp

简单的学生成绩管理系统,只能供入门者参考

// SCDLG.cpp : implementation file
//

#include "stdafx.h"
#include "DB.h"
#include "SCDLG.h"
#include "PWSet.h"


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

/////////////////////////////////////////////////////////////////////////////
// SCDLG dialog


SCDLG::SCDLG(CWnd* pParent /*=NULL*/)
	: CDialog(SCDLG::IDD, pParent)
{
	//{{AFX_DATA_INIT(SCDLG)
	m_cname = _T("");
	m_grade = 0;
	m_sno = _T("");
	//}}AFX_DATA_INIT
}


void SCDLG::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(SCDLG)
	DDX_Control(pDX, IDC_LIST2, m_list);
	DDX_Text(pDX, IDC_CNAME, m_cname);
	DDX_Text(pDX, IDC_GRADE, m_grade);
	DDX_Text(pDX, IDC_Sno, m_sno);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(SCDLG, CDialog)
	//{{AFX_MSG_MAP(SCDLG)
	ON_NOTIFY(LVN_ITEMCHANGED, IDC_LIST2, OnItemchangedList2)
	ON_BN_CLICKED(IDC_ADD, OnAdd)
	ON_BN_CLICKED(IDC_delete, Ondelete)
	ON_BN_CLICKED(IDC_modify, Onmodify)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// SCDLG message handlers

BOOL SCDLG::OnInitDialog() 
{
	CDialog::OnInitDialog();
	

m_list.SetExtendedStyle(LVS_EX_GRIDLINES|LVS_EX_FULLROWSELECT);
  m_list.InsertColumn(0,"学号",LVCFMT_CENTER,100);
  m_list.InsertColumn(1,"课程名",LVCFMT_CENTER,110);
   m_list.InsertColumn(2,"成绩",LVCFMT_CENTER,100);
pdb=new CDatabase;

    m_pSet=new SCSet(pdb);

    m_pSet->Open();

LoadData();


	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void SCDLG::OnItemchangedList2(NMHDR* pNMHDR, LRESULT* pResult) 
{
	NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
int selectrow=pNMListView->iItem;
 m_sno=m_list.GetItemText(selectrow,0);
 m_cname=m_list.GetItemText(selectrow,1);
 m_grade=atoi(m_list.GetItemText(selectrow,2));
 UpdateData(FALSE);

	
	*pResult = 0;
}
void SCDLG::LoadData()
{
	m_list.DeleteAllItems();
  int i=0;
 while(!m_pSet->IsEOF())
 {
  m_list.InsertItem(i,m_pSet->m_sno);
  m_list.SetItemText(i,1,m_pSet->m_cname);
  CString str;
  str.Format("%d",m_pSet->m_grade);
  m_list.SetItemText(i,2,str);
  i++;
  m_pSet->MoveNext();
 }


}
void SCDLG::OnAdd() 
{
UpdateData(true);

CString str;
str.Format("insert into sc values('%s' ,'%s' ,%d)",m_sno,m_cname ,m_grade);
 pdb->ExecuteSQL(str);
 m_pSet->Requery();
 LoadData();
	
}

void SCDLG::Ondelete() 
{UpdateData(true);

CString str;
if(MessageBox("确定吗？","你真的要删除吗？",MB_YESNO|MB_ICONINFORMATION)==IDYES)
{str.Format("delete from sc  where sno='%s'and cname='%s'",m_sno,m_cname);
 pdb->ExecuteSQL(str);
 m_pSet->Requery();
 LoadData();}
}

void SCDLG::Onmodify() 
{
	UpdateData(true);

CString str;
str.Format("update sc set grade=%d where sno='%s' and cname='%s'", m_grade,m_sno,m_cname);
 pdb->ExecuteSQL(str);
 m_pSet->Requery();
 LoadData();


	
}