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// ADOTranDlg.cpp : implementation file
//
#include "stdafx.h"
#include "ADOTran.h"
#include "ADOTranDlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
class CAboutDlg : public CDialog
{
public:
CAboutDlg();
// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL
// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CADOTranDlg dialog
CADOTranDlg::CADOTranDlg(CWnd* pParent /*=NULL*/)
: CDialog(CADOTranDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CADOTranDlg)
m_CNO = _T("");
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CADOTranDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CADOTranDlg)
DDX_Control(pDX, IDC_LIST1, m_ctlList);
DDX_Text(pDX, IDC_EDIT2, m_CNO);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CADOTranDlg, CDialog)
//{{AFX_MSG_MAP(CADOTranDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_MODIFY, OnModify)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CADOTranDlg message handlers
BOOL CADOTranDlg::OnInitDialog()
{
CDialog::OnInitDialog();
// Add "About..." menu item to system menu.
// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}
// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
::CoInitialize(NULL); //初始化COM环境
HRESULT hr;
try
{
hr=m_pConnection.CreateInstance(__uuidof(Connection));
if(SUCCEEDED(hr))
{
m_pConnection->ConnectionString="File Name=LinkDatabase.udl";
m_pConnection->ConnectionTimeout=20;//等待连接的时间为20s
hr=m_pConnection->Open("","","",adConnectUnspecified);
if(FAILED(hr))
{
AfxMessageBox("打开数据库失败!");
return false;
}
}
else
{
AfxMessageBox("创建连接对象失败!");
return false;
}
}
catch(_com_error e)
{
AfxMessageBox("数据库连接失败!");
return FALSE;
}
return TRUE; // return TRUE unless you set the focus to a control
}
void CADOTranDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}
// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.
void CADOTranDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}
// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CADOTranDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CADOTranDlg::OnModify()
{
// TODO: Add your control notification handler code here
UpdateData(true);
m_ctlList.ResetContent();//清空列表框
m_pRecordset.CreateInstance(__uuidof(Recordset));
_variant_t RecordsAffected;
CString vSQL;
vSQL.Format("update COURSE set CNO='%s' where CNO='C04'",m_CNO);
try
{
m_pConnection->BeginTrans();//开始事务
m_pConnection->Execute(_bstr_t(vSQL),&RecordsAffected,adCmdText);//更新COURSE表
vSQL.Format("update SC set CNO='%s' where CNO='C04'",m_CNO);
m_pConnection->Execute(_bstr_t(vSQL),&RecordsAffected,adCmdText);//更新SC表
m_pConnection->CommitTrans();//提交事务
}
catch(_com_error e)
{
m_pConnection->RollbackTrans();//回滚事务
AfxMessageBox(e.ErrorMessage());
}
vSQL.Format("SELECT * FROM SC WHERE CNO='%s'",m_CNO);
m_pRecordset=m_pConnection->Execute(_bstr_t(vSQL),&RecordsAffected,adCmdText);
if((m_pRecordset->BOF)&&(m_pRecordset->adoEOF))
{
AfxMessageBox("得到的记录集为空!");
m_pRecordset->Close();
return;
}
while(VARIANT_FALSE ==m_pRecordset->adoEOF)//将得到的记录集添加到列表框中
{
_variant_t vFieldValue;
CString strID,strCNO,strGrade;
vFieldValue = m_pRecordset->GetCollect("SNO");
strID = (char*)_bstr_t(vFieldValue);
vFieldValue.Clear();
vFieldValue = m_pRecordset->GetCollect("CNO");
strCNO = (char*)_bstr_t(vFieldValue);
vFieldValue.Clear();
vFieldValue = m_pRecordset->GetCollect("GRADE");
strGrade = (char*)_bstr_t(vFieldValue);
vFieldValue.Clear();
CString strItem;
strItem.Format(":%s课程号:%s成绩:%s",strID,strCNO,strGrade);
m_ctlList.AddString(strItem);
m_pRecordset->MoveNext();//下一条记录
}
}
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