xxxdlg.cpp

ADO -- 派生一个 DBGrid 控件

// XXXDlg.cpp : implementation file
//

#include "stdafx.h"
#include "XXX.h"
#include "XXXDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CXXXDlg dialog

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

void CXXXDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CXXXDlg)
	DDX_Control(pDX, IDC_LIST1, m_list);
	DDX_Text(pDX, IDC_EDIT1, m_edit);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CXXXDlg, CDialog)
	//{{AFX_MSG_MAP(CXXXDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_RUN, OnRun)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CXXXDlg message handlers

BOOL CXXXDlg::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


	// 初始化 COM
	if( FAILED(::CoInitialize(NULL)) ) 
	{
	    AfxMessageBox("ADO Init failed");
		return false;
	}
	
	try
	{
		// 创建连接
		ADOConn.CreateInstance(__uuidof(Connection));
		_bstr_t strConnect = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Demo.mdb;";
//		_bstr_t strConnect = "Provider=SQLOLEDB.1; Data Source=""; Initial Catalog=juju; User ID=sa; PWD="";";
		ADOConn->Open(strConnect, "", "", adConnectUnspecified);
	}
	catch(_com_error &e)
	{
		CString err;
		err.Format("%s", (char*)(e.Description()) );
		AfxMessageBox(err);
	}
	catch(...)
	{
		AfxMessageBox("Unknow Error.....");
	}

	CEdit* edit;
	edit = (CEdit*) GetDlgItem(IDC_EDIT1);
	edit->SetWindowText("select * from ");
	edit->SetFocus();

	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

bool CXXXDlg::OnRun() 
{
	// TODO: Add your control notification handler code here

	UpdateData(true);			// 控件－> m_edit
	_variant_t strSQL = m_edit;	// 不能直接将 m_edit 转为 _bstr_t, 必须先转为 _variant_t

	_RecordsetPtr Set;
	try
	{
		Set = ADOConn->Execute((_bstr_t)strSQL, NULL, adCmdText);
	}
	catch(_com_error &e)
	{
       CString err;
	   err.Format("ADO Error: %s", (char*)e.Description());
	   AfxMessageBox(err);
	   return false;
	}

	// 设置 DBGrid
	m_list.SetRecordset(Set);

	return true;
}




void CXXXDlg::OnOK() 
{
	// TODO: Add extra validation here
	
//	CDialog::OnOK();
}