数据库系统

开发平台：
Visual C++

ChangeLeaveDlg.cpp：源码内容
							// ChangeLeaveDlg.cpp : implementation file
//
#include "stdafx.h"
#include "school.h"
#include "ChangeLeaveDlg.h"
#include "ChangeLeaveInfoDlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CChangeLeaveDlg dialog
CChangeLeaveDlg::CChangeLeaveDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CChangeLeaveDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CChangeLeaveDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
}
void CChangeLeaveDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CChangeLeaveDlg)
	DDX_Control(pDX, IDC_LIST1, m_ctrList);
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CChangeLeaveDlg, CDialog)
	//{{AFX_MSG_MAP(CChangeLeaveDlg)
	ON_BN_CLICKED(IDC_BUTTON_NEW, OnButtonNew)
	ON_BN_CLICKED(IDC_BUTTON_MODIFY, OnButtonModify)
	ON_BN_CLICKED(IDC_BUTTON_DELETE, OnButtonDelete)
	ON_NOTIFY(NM_DBLCLK, IDC_LIST1, OnDblclkList1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CChangeLeaveDlg message handlers
BOOL CChangeLeaveDlg::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	m_ctrList.InsertColumn(0,"编号");
	m_ctrList.InsertColumn(1,"退学人");
	m_ctrList.InsertColumn(2,"班级");
	m_ctrList.InsertColumn(3,"离校时间");
	m_ctrList.InsertColumn(4,"退学原因");
	m_ctrList.SetColumnWidth(0,80);
	m_ctrList.SetColumnWidth(1,80);
	m_ctrList.SetColumnWidth(2,80);
	m_ctrList.SetColumnWidth(3,80);
	m_ctrList.SetColumnWidth(4,120);
	m_ctrList.SetExtendedStyle(LVS_EX_FULLROWSELECT|LVS_EX_GRIDLINES);
	RefreshData();
	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}
void CChangeLeaveDlg::RefreshData()
{
	m_ctrList.DeleteAllItems();
	m_ctrList.SetRedraw(FALSE);
	UpdateData(TRUE);
	CString strSQL;
	strSQL="select * from leave";
	if(!m_recordset.Open(AFX_DB_USE_DEFAULT_TYPE,strSQL))
	{
		MessageBox("打开数据库失败!","数据库错误",MB_OK);
		return ;
	}	
	int i=0;
	while(!m_recordset.IsEOF())
	{
		
		m_ctrList.InsertItem(i,m_recordset.m_code);
		m_ctrList.SetItemText(i,1,m_recordset.m_name);
		m_ctrList.SetItemText(i,2,m_recordset.m_class);
		m_ctrList.SetItemText(i,3,m_recordset.m_date);
		m_ctrList.SetItemText(i,4,m_recordset.m_reason);
		i++;
		m_recordset.MoveNext();
	}
	m_recordset.Close();
	m_ctrList.SetRedraw(TRUE);
	
}
void CChangeLeaveDlg::OnButtonNew() 
{
	// TODO: Add your control notification handler code here
	CString strSQL;
	CChangeLeaveInfoDlg   Dlg;
	while(1)
	{
		if(IDOK==Dlg.DoModal())
		{
			strSQL.Format("select * from leave where code = '%s'",Dlg.m_strCode);
			if(!m_recordset.Open(AFX_DB_USE_DEFAULT_TYPE,strSQL))
			{
				AfxMessageBox("打开数据库失败!");
				return ;
			}
			if(m_recordset.GetRecordCount()!=0)
			{
				AfxMessageBox("该编号已经存在！请重新输入！");
				m_recordset.Close();
				continue;
			}
			
			m_recordset.AddNew();
			m_recordset.m_name		=	Dlg.m_strName		;
			m_recordset.m_reason	=	Dlg.m_strBrief		;
			m_recordset.m_date		=   Dlg.m_strDate		;
			m_recordset.m_class		=	Dlg.m_strClass		;
			m_recordset.m_code		=	Dlg.m_strCode		;
			m_recordset.Update();
			m_recordset.Close();
			RefreshData();
		}
		break;
	}			
}
void CChangeLeaveDlg::OnButtonModify() 
{
	// TODO: Add your control notification handler code here
	CChangeLeaveInfoDlg Dlg;
	UpdateData();
	int i = m_ctrList.GetSelectionMark();
	if(0>i)
	{
		AfxMessageBox("请选择一条记录进行修改！");
		return;
	}
	
	Dlg.m_strName			=	m_ctrList.GetItemText(i,1);
	Dlg.m_strBrief			=	m_ctrList.GetItemText(i,4);
	Dlg.m_strDate			=	m_ctrList.GetItemText(i,3);
	Dlg.m_strClass			=	m_ctrList.GetItemText(i,2);
	Dlg.m_strCode			=	m_ctrList.GetItemText(i,0);
	if(IDOK==Dlg.DoModal())
	{//修改记录
		CString strSQL;
		strSQL.Format("select * from leave where code = '%s'",m_ctrList.GetItemText(i,0));
		if(!m_recordset.Open(AFX_DB_USE_DEFAULT_TYPE,strSQL))
		{
			AfxMessageBox("打开数据库失败!");
			return ;
		}
		m_recordset.Edit();
		m_recordset.m_name		=	Dlg.m_strName		;
		m_recordset.m_reason	=	Dlg.m_strBrief		;
		m_recordset.m_date		=   Dlg.m_strDate		;
		m_recordset.m_class		=	Dlg.m_strClass		;
		m_recordset.m_code		=	Dlg.m_strCode		;
		m_recordset.Update();
		m_recordset.Close();
		RefreshData();
	}					
}
void CChangeLeaveDlg::OnButtonDelete() 
{
	// TODO: Add your control notification handler code here
	int i = m_ctrList.GetSelectionMark();
	if(0>i)
	{
		AfxMessageBox("请选择一条记录进行查看！");
		return;
	}
	CString strSQL;
	strSQL.Format("select * from leave where code = '%s' ",m_ctrList.GetItemText(i,0));
	if(!m_recordset.Open(AFX_DB_USE_DEFAULT_TYPE,strSQL))
	{
		AfxMessageBox("打开数据库失败!");
		return ;
	}
	m_recordset.Delete();
	m_recordset.Close();
	RefreshData();				
}
void CChangeLeaveDlg::OnDblclkList1(NMHDR* pNMHDR, LRESULT* pResult) 
{
	// TODO: Add your control notification handler code here
	CChangeLeaveInfoDlg Dlg;
	UpdateData();
	int i = m_ctrList.GetSelectionMark();
	if(0>i)
	{
		AfxMessageBox("请选择一条记录进行修改！");
		return;
	}
	
	Dlg.m_strName			=	m_ctrList.GetItemText(i,1);
	Dlg.m_strBrief			=	m_ctrList.GetItemText(i,4);
	Dlg.m_strDate			=	m_ctrList.GetItemText(i,3);
	Dlg.m_strClass			=	m_ctrList.GetItemText(i,2);
	Dlg.m_strCode			=	m_ctrList.GetItemText(i,0);
	if(IDOK==Dlg.DoModal())
	{//修改记录
		CString strSQL;
		strSQL.Format("select * from leave where code = '%s'",m_ctrList.GetItemText(i,0));
		if(!m_recordset.Open(AFX_DB_USE_DEFAULT_TYPE,strSQL))
		{
			AfxMessageBox("打开数据库失败!");
			return ;
		}
		m_recordset.Edit();
		m_recordset.m_name		=	Dlg.m_strName		;
		m_recordset.m_reason	=	Dlg.m_strBrief		;
		m_recordset.m_date		=   Dlg.m_strDate		;
		m_recordset.m_class		=	Dlg.m_strClass		;
		m_recordset.m_code		=	Dlg.m_strCode		;
		m_recordset.Update();
		m_recordset.Close();
		RefreshData();
	}						
	*pResult = 0;
}

						