adotestdlg.cpp

应用ADO技术编写的VC连接SQL的接口程序,具有广泛的适用性,也是学习基于VC的数据库编程的良好教程.

// AdotestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Adotest.h"
#include "AdotestDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CAdotestDlg dialog

CAdotestDlg::CAdotestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CAdotestDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CAdotestDlg)
	m_Name = _T("");
	m_Age = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CAdotestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAdotestDlg)
	DDX_Control(pDX, IDC_LISTSQL, m_SqlList);
	DDX_Text(pDX, IDC_NAME, m_Name);
	DDX_Text(pDX, IDC_AGE, m_Age);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAdotestDlg, CDialog)
	//{{AFX_MSG_MAP(CAdotestDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_READSQL, OnReadsql)
	ON_EN_CHANGE(IDC_AGE, OnChangeAge)
	ON_EN_CHANGE(IDC_NAME, OnChangeName)
	ON_LBN_SELCHANGE(IDC_LISTSQL, OnSelchangeListsql)
	ON_BN_CLICKED(IDC_WRITESQL, OnWritesql)
	ON_BN_CLICKED(IDC_EXIT, OnExit)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CAdotestDlg message handlers

BOOL CAdotestDlg::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
	
	return TRUE;  // return TRUE  unless you set the focus to a control
	return TRUE;  // return TRUE  unless you set the focus to a control

	extern CAdotestApp theApp;// 在此引用应用类中的theApp来获取库连接指针
	m_pRecordset.CreateInstance(_uuidof(Recordset));
	try
	{
		m_pRecordset->Open("SELECT *FROM tz",
			theApp.m_pConnection.GetInterfacePtr(),
			adOpenDynamic,
			adLockOptimistic,
			adCmdText);
	}
	catch(_com_error *e)
	{ 
		AfxMessageBox(e->ErrorMessage());
	}
}

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

void CAdotestDlg::OnReadsql() 
{
	_variant_t var;
	CString strName, strAge;
	m_SqlList.ResetContent();
	strName=strAge="";
	try
	{
		if(!m_pRecordset->BOF)
			m_pRecordset->MoveFirst();
		else
		{
			AfxMessageBox("表内数据为空");
			return;
		}
		while (!m_pRecordset->adoEOF)//如果记录集没有达到末尾,则浏览记录
		{
			var=m_pRecordset->GetCollect("Name");
			if(var.vt!=VT_NULL)
				strName=(LPCSTR)_bstr_t(var);
			var=m_pRecordset->GetCollect("Age");
			if(var.vt!=VT_NULL)
				strAge=(LPCSTR)_bstr_t(var);
			m_SqlList.AddString(strName+":"+strAge);
			m_pRecordset->MoveNext();
		}
		m_SqlList.SetCurSel(0);
			OnSelchangeListsql();
	}
	catch(_com_error *e)
	{
		AfxMessageBox(e->ErrorMessage());
	}
}

void CAdotestDlg::OnChangeAge() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
	
}

void CAdotestDlg::OnChangeName() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
	
}

void CAdotestDlg::OnSelchangeListsql() 
{
	// TODO: Add your control notification handler code here
	
}

void CAdotestDlg::OnWritesql() 
{
	UpdateData(true);
	if(m_Name==""||m_Age=="")
	{
		AfxMessageBox("信息不能为空!");
		return;
	}
	try
	{
		if(!m_pRecordset->Supports(adAddNew))
			return;
		m_pRecordset->AddNew();
		m_pRecordset->PutCollect("Name",_variant_t(m_Name));
		m_pRecordset->PutCollect("Age",atol(m_Age));
		m_pRecordset->Update();
		AfxMessageBox("插入成功!");
		OnReadsql();
		int nCurSel=m_SqlList.GetCurSel();
		m_SqlList.SetCurSel(nCurSel);
		OnSelchangeListsql();
	}
	catch(_com_error *e)
	{
		AfxMessageBox(e->ErrorMessage());
	}

}


void CAdotestDlg::OnExit() 
{
	// TODO: Add your control notification handler code here
	
}