imagedlg.cpp

将图片数据全部放在了数据库中

// ImageDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Image.h"
#include "ImageDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CImageDlg dialog

CImageDlg::CImageDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CImageDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CImageDlg)
		// 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 CImageDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CImageDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CImageDlg, CDialog)
	//{{AFX_MSG_MAP(CImageDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDB_ADDBUTTON, OnAddbutton)
	ON_BN_CLICKED(IDB_SHOW, OnShow)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CImageDlg message handlers

BOOL CImageDlg::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
	InitDataBase();
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CImageDlg::InitDataBase()
{
	CString strSql;
	HRESULT hr;
	hr = m_pConnection.CreateInstance("ADODB.Connection");
	if (SUCCEEDED(hr))
	{		
		strSql = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=test.mdb";
		m_pConnection->ConnectionTimeout = 5;
	    hr = m_pConnection->Open(_bstr_t(strSql),"","",adModeUnknown);
		if (FAILED(hr))
		{
			MessageBox("Open database failed!!");
		}
		else
		{
			hr = m_pRecordset.CreateInstance("ADODB.RECORDSET");
			if (SUCCEEDED(hr))
			{
				strSql = "Select * from Info";
				hr = m_pRecordset->Open(_variant_t(strSql),_variant_t((IDispatch *)(m_pConnection)),
					adOpenStatic,adLockOptimistic,adCmdText);
				if (FAILED(hr))
				{
					MessageBox("recordset open failed");
					return;
				}
			}
			else
			{
				MessageBox("Recordset CreateInstance failed!!");
			}
		}
	}
	else
	{
		MessageBox("Connection CreateInstance failed!!");
	}
}

void CImageDlg::OnAddbutton() 
{
	this->m_pRecordset->AddNew();
	CTime time = CTime::GetCurrentTime();
	CString strTemp;
	strTemp = time.Format("%H:%M:%S");
	m_pRecordset->PutCollect(_variant_t("No"),_variant_t(strTemp));
     
    CFile file;
	file.Open("E:\\photo\\11.bmp",CFile::modeRead);
	BYTE* lp = (BYTE *) malloc(file.GetLength());
	file.Read(lp,file.GetLength());

    SAFEARRAYBOUND	rgsabound[1];
	rgsabound[0].lLbound = 0;
	rgsabound[0].cElements = file.GetLength();
	SAFEARRAY  *sa = SafeArrayCreate(VT_UI1,1,rgsabound);
	for (long i = 0;i< (long)file.GetLength();i++)
	{
		SafeArrayPutElement(sa,&i,lp++);
	}
	for ( i = 0;i<(long) file.GetLength();i++)
	{
		lp--;
	}
	VARIANT	varBLOB;
	varBLOB.vt = VT_ARRAY | VT_UI1;
	varBLOB.parray = sa;
	m_pRecordset->GetFields()->GetItem("Data")->AppendChunk(varBLOB);
	m_pRecordset->Update();
	file.Close();
	free(lp);
	SafeArrayDestroy(sa);
}

void CImageDlg::OnShow() 
{
	m_pRecordset->MoveFirst();
	long nn = 0;
	_variant_t index = (_variant_t)nn ;
	_variant_t vartemp = m_pRecordset->GetCollect(index);
	CString strTemp;
	strTemp = (const char *)(_bstr_t)vartemp;
	MessageBox(strTemp);

	long nSize = m_pRecordset->GetFields()->GetItem("Data")->ActualSize;
/*	_variant_t varTemp = m_pRecordset->GetFields()->GetItem("Data")->GetChunk(nSize);
	LPBYTE lp = new BYTE[nSize+1];
	char* lpBuffer;
	SafeArrayAccessData(varTemp.parray,(void **)&lpBuffer);
	memcpy(lp,lpBuffer,nSize);
	SafeArrayUnaccessData(varTemp.parray);
*/	

	_variant_t	varBLOB;
	varBLOB = m_pRecordset->GetFields()->GetItem("Data")->GetChunk(nSize);
	BYTE *pBuffer = (BYTE *)malloc(nSize);	///重新申请必要的存储空间
	memset(pBuffer,0,nSize);
//	varBLOB.parray=(SAFEARRAY *)::GlobalAlloc(GPTR,nSize);
	char *pBuf = (char *)(::GlobalLock(varBLOB.parray))	;

//	SafeArrayAccessData(varBLOB.parray,(void **)&pBuf);
	memcpy(pBuffer,pBuf,nSize);				///复制数据到缓冲区m_pBMPBuffer
//	SafeArrayUnaccessData (varBLOB.parray);
	
	CFile file;
	file.Open("E:\\test.bmp",CFile::modeCreate|CFile::modeWrite);
	file.Write(pBuffer,nSize);
	file.Close();
    free(pBuffer);
/*	*/
}