myadotestdlg.cpp

vc下的ADO数据库编程

// myadotestDlg.cpp : implementation file
//
//＋＋＋＋相生昌作品＋＋＋//
//++Email:[e-mail]++//

#include "stdafx.h"
#include "myadotest.h"
#include "myadotestDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMyadotestDlg dialog

CMyadotestDlg::CMyadotestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMyadotestDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMyadotestDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	
}

void CMyadotestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMyadotestDlg)
	DDX_Control(pDX, IDC_LIST4, m_list);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMyadotestDlg, CDialog)
	//{{AFX_MSG_MAP(CMyadotestDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyadotestDlg message handlers

BOOL CMyadotestDlg::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

	m_list.InsertColumn(0,"name",LVCFMT_LEFT,70);
	m_list.InsertColumn(1,"age",LVCFMT_LEFT,50);
	m_list.InsertColumn(2,"highth",LVCFMT_LEFT,50);
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMyadotestDlg::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 CMyadotestDlg::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 CMyadotestDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

//得到应用程序的路径
CString GetAppPath()
{
	char lpFileName[MAX_PATH];
	GetModuleFileName(AfxGetInstanceHandle(),lpFileName,MAX_PATH);

	CString strFileName = lpFileName;
	int nIndex = strFileName.ReverseFind ('\\');
	
	CString strPath;

	if (nIndex > 0)
		strPath = strFileName.Left (nIndex);
	else
		strPath = "";

	return strPath;
}
//得到访问VF表的DSN字符串
CString GetVFFreeTableSRCString(CString strFolderName)
{
	CString strSRC;
	strSRC="DRIVER=Microsoft Visual FoxPro Driver;";
	strSRC+="SourceType=DBF;";
	strSRC+="SourceDB=";
	strSRC+=strFolderName;
	strSRC+="\\";
	strSRC+=";UID=SA;PWD=";
	return strSRC;
}
//创建表
void CMyadotestDlg::OnButton1() 
{
	// TODO: Add your control notification handler code here
	_ConnectionPtr pConn;
	if(FAILED(pConn.CreateInstance("ADODB.Connection")))
	{
		AfxMessageBox("Create Instance Failed!");
		return;
	}

	CString strSRC;
	CString strSQL;

	strSRC=GetAppPath();
	
	strSRC=GetVFFreeTableSRCString(strSRC);
	strSQL="create table mytable(name char(10),age int,highth float(4,2))";

	_variant_t   varSRC(strSRC);
	_variant_t   varSQL(strSQL);
	_bstr_t      bstrSRC(strSRC);

	
	if(FAILED(pConn->Open(bstrSRC,"","",-1)))
	{
		AfxMessageBox("Can not open the databse!");
		pConn->Release();
		return;
	}

	COleVariant vtOptional((long)DISP_E_PARAMNOTFOUND,VT_ERROR);

	pConn->Execute(_bstr_t(strSQL),&vtOptional,-1);

	pConn.Release();

	AfxMessageBox("Created the table successfully!");
}
//插入记录
void CMyadotestDlg::OnButton2() 
{
	// TODO: Add your control notification handler code here
	_ConnectionPtr pConn;
	if(FAILED(pConn.CreateInstance("ADODB.Connection")))
	{
		AfxMessageBox("Create the Instance Failed!");
		return;
	}

	CString strSRC;
	CString strSQL;
	
	strSRC=GetAppPath();
	strSRC=GetVFFreeTableSRCString(strSRC);

	CString myname="xsc";
	int myage=26;
	float myhighth=1.72;
	strSQL.Format("insert into mytable values('%s',%d,%f)",myname,myage,myhighth);

	//strSQL="insert into mytable(name,age,highth) values('xsc',24,1.72)";

	_variant_t  varSRC(strSRC);
	_bstr_t     bstrSRC(strSRC);

	if(FAILED(pConn->Open(bstrSRC,"","",-1)))
	{
		AfxMessageBox("can not open the database!");
		pConn.Release();
		return;
	}

	COleVariant  vtOptional((long)DISP_E_PARAMNOTFOUND,VT_ERROR);

	try
	{
		pConn->Execute(_bstr_t(strSQL),&vtOptional,-1);
	}
	catch(...)
	{
		//pConn->Close();
		//pConn->Release();
		AfxMessageBox("inert the record error!");
		return;
	}

	pConn->Close();
	pConn.Release();

	AfxMessageBox("Insert the record successfully!");
}
//查询
void CMyadotestDlg::OnButton3() 
{
	// TODO: Add your control notification handler code here
	_ConnectionPtr pConn;
	if(FAILED(pConn.CreateInstance("ADODB.Connection")))
	{
		AfxMessageBox("create the Instance failed!");
		return;
	}

	CString strSRC;
	CString strSQL;

	strSRC=GetAppPath();
	strSRC=GetVFFreeTableSRCString(strSRC);

	strSQL="select * from mytable";

	_variant_t		varSRC(strSRC);
	_variant_t		varSQL(strSQL);
	_bstr_t			bstrSRC(strSRC);

	if (FAILED(pConn->Open(bstrSRC,"","",-1)))
	{
		AfxMessageBox("Can not open Database!");
		pConn.Release();
		return;
	}

	_RecordsetPtr rs;

	COleVariant vtOptional((long)DISP_E_PARAMNOTFOUND,VT_ERROR);

	try
	{
		rs=pConn->Execute(_bstr_t(strSQL),&vtOptional,-1);
	}
	catch(...)
	{
		pConn->Close();
		pConn.Release();
		AfxMessageBox("Error!");
		return;
	}

	CString m_strname;
	CString m_strage;
	CString m_strhighth;
	while(!rs->GetadoEOF())
	{
		_variant_t varstrname=rs->GetCollect("name");
		_variant_t varstrage=rs->GetCollect("age");
		_variant_t varstrhighth=rs->GetCollect("highth");
		
		m_strname=(char*)_bstr_t(varstrname);
		m_strage=(char*)_bstr_t(varstrage);
		m_strhighth=(char*)_bstr_t(varstrhighth);

		int nCount = m_list.GetItemCount();
		int nItem = m_list.InsertItem (nCount,_T(""));
		m_list.SetItemText (nItem,0,m_strname);
		m_list.SetItemText (nItem,1,m_strage);
		m_list.SetItemText (nItem,2,m_strhighth);
		rs->MoveNext();
	}

	rs->Close();
	rs.Release();
	pConn->Close();
	pConn.Release();
}