data_disp1dlg.cpp

数据库是存储数据的仓库

	HBITMAP OldBitmap;

	CWnd *pWnd = GetDlgItem(IDC_PICTURE);
	CRect rect; 
	pWnd->GetClientRect(&rect);	
	pDC = pWnd->GetDC();

	CDC MemDC;
	
	MemDC.CreateCompatibleDC(pDC);
	OldBitmap=(HBITMAP)MemDC.SelectObject(m_hPhotoBitmap);
	pDC->BitBlt(x,y,rect.Width(),rect.Height(),&MemDC,0,0,SRCCOPY);
	MemDC.SelectObject(OldBitmap);
}
//-----------------------------------------//

HCURSOR CData_Disp1Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CData_Disp1Dlg::OnButtonNext() 
{
	// TODO: Add your control notification handler code here
	//假如当前记录改动过，则先保存
	if(m_bModify)
		OnButtonSave();
	m_pRecordset->MoveNext();
	if(m_pRecordset->adoEOF)
		m_pRecordset->MoveLast();
	ReadData();
	ResetControls();
	Invalidate();		
}

void CData_Disp1Dlg::OnButtonPreview() 
{
	// TODO: Add your control notification handler code here
	
	//假如当前记录改动过，则保存
	if(m_bModify)
		OnButtonSave();
	m_pRecordset->MovePrevious();
	if(m_pRecordset->BOF)
		m_pRecordset->MoveFirst();
	ReadData();
	ResetControls();
	Invalidate();
}

void CData_Disp1Dlg::OnButtonAdd() 
{
	// TODO: Add your control notification handler code here
	if(m_bModify)
	{
		int nRet = MessageBox("当前信息尚未保存，是否保存?","用户信息",MB_YESNOCANCEL);
		switch(nRet)
		{
		case IDCANCEL:
			return;
		case IDYES:
			OnButtonSave();
			break;
		case IDNO:
		default:
			break;
		}
	}
	m_editName.EnableWindow();
	m_btnSex.EnableWindow();
	m_ctrlBirth.EnableWindow();
	m_editAddress.EnableWindow();
	m_editPhone.EnableWindow();
	m_editRemark.EnableWindow();
    m_editEmail.EnableWindow();

	m_btnDelete.EnableWindow(FALSE);
	m_btnSelPhoto.EnableWindow();
    m_btnEdit.EnableWindow(FALSE);

	m_strName = "";
	m_timeBitrh = COleDateTime::GetCurrentTime();
	m_strAddress ="";
	m_nPhone = 0;
	m_strRemark = "";
	m_nSex = 0;
    m_strEmail="";

	m_bNewRecord = TRUE;
	m_bModify = FALSE;
	UpdateData(FALSE);
	DestroyPhoto();
	Invalidate();	
}

void CData_Disp1Dlg::OnButtonDelete() 
{
	// TODO: Add your control notification handler code here
	if (MessageBox("是否要删除当前数据？","数据删除",MB_YESNO)==IDYES) 
	{
		m_pRecordset->Delete(adAffectCurrent);
		if(m_pRecordset->adoEOF)
			m_pRecordset->MoveLast();
		ResetControls();
		m_btnDelete.EnableWindow(FALSE);
		ReadData();
		Invalidate();
	}	
}
                               

void CData_Disp1Dlg::OnButtonSave() 
{
	// TODO: Add your control notification handler code here
	if(!m_bModify) return;
	UpdateData();
	if( m_strName == "" ||  m_timeBitrh == NULL||m_strEmail==""|| 
		m_strAddress == "" ||m_nPhone == 0 || m_strRemark == "" )
	{
		AfxMessageBox("您没有提供完整的用户信息。");
		return;
	}
	m_btnSave.EnableWindow(FALSE);
	

	if(m_bNewRecord)
	{	
		m_pRecordset->AddNew();
		m_pRecordset->PutCollect("NAME",_variant_t(m_strName));
		m_pRecordset->PutCollect("ADDRESS",_variant_t(m_strAddress));
		m_pRecordset->Fields->Item["NAME"]->Value= _variant_t(m_strName);

		m_pRecordset->PutCollect("REMARK",_variant_t(m_strRemark));
		m_pRecordset->PutCollect("Email",_variant_t(m_strEmail));
		CString str;
		str.Format("%d",m_nSex);
		m_pRecordset->PutCollect("Sex",_variant_t(str));

		str.Format("%d",m_nPhone);
		m_pRecordset->PutCollect("PHONE",_variant_t(str));

		m_pRecordset->PutCollect("BIRTH",_variant_t(m_timeBitrh));

		//---------------图像数据-----------------------------//
		char			*pBuf = m_pBMPBuffer;
		VARIANT			varBLOB;
		SAFEARRAY		*psa;
		SAFEARRAYBOUND	rgsabound[1];
		if(pBuf)
		{    
			rgsabound[0].lLbound = 0;
			rgsabound[0].cElements = m_nFileLen;
			psa = SafeArrayCreate(VT_UI1, 1, rgsabound);
			for (long i = 0; i < (long)m_nFileLen; i++)
				SafeArrayPutElement (psa, &i, pBuf++);
			varBLOB.vt = VT_ARRAY | VT_UI1;
			varBLOB.parray = psa;
			m_pRecordset->GetFields()->GetItem("photo")->AppendChunk(varBLOB);
		}
		//-----------------------------------------------------//
		m_pRecordset->Update();
	}
    
	if(m_bModify)
	{			
		m_pRecordset->PutCollect("NAME",_variant_t(m_strName));
		m_pRecordset->PutCollect("ADDRESS",_variant_t(m_strAddress));
		m_pRecordset->PutCollect("REMARK",_variant_t(m_strRemark));
		m_pRecordset->PutCollect("Email",_variant_t(m_strEmail));
		CString str;
		str.Format("%d",m_nSex);
		m_pRecordset->PutCollect("Sex",_variant_t(str));

		str.Format("%d",m_nPhone);
		m_pRecordset->PutCollect("PHONE",_variant_t(str));

		m_pRecordset->PutCollect("BIRTH",_variant_t(m_timeBitrh));
		//---------------图像数据-----------------------------//
		char			*pBuf = m_pBMPBuffer;
		VARIANT			varBLOB;
		SAFEARRAY		*psa;
		SAFEARRAYBOUND	rgsabound[1];
		if(pBuf)
		{    
			rgsabound[0].lLbound = 0;
			rgsabound[0].cElements = m_nFileLen;
			psa = SafeArrayCreate(VT_UI1, 1, rgsabound);
			for (long i = 0; i < (long)m_nFileLen; i++)
				SafeArrayPutElement (psa, &i, pBuf++);
			varBLOB.vt = VT_ARRAY | VT_UI1;
			varBLOB.parray = psa;
			m_pRecordset->GetFields()->GetItem("photo")->AppendChunk(varBLOB);
		}
		//-----------------------------------------------------//
		m_pRecordset->Update();
	}

	m_btnDelete.EnableWindow();
    m_btnEdit.EnableWindow();
	m_btnAdd.EnableWindow();
	ResetControls();
	m_bModify = FALSE;	
}

void CData_Disp1Dlg::OnButtonFirst() 
{
	// TODO: Add your control notification handler code here
	//假如当前记录改动过，则先保存
	if(m_bModify)
		OnButtonSave();
	m_pRecordset->MovePrevious();
	m_pRecordset->MoveFirst();
	ReadData();
	ResetControls();
	Invalidate();	
}

void CData_Disp1Dlg::OnButtonLast() 
{
	// TODO: Add your control notification handler code here
	//假如当前记录改动过，则先保存
	if(m_bModify)
		OnButtonSave();
	m_pRecordset->MoveNext();
	m_pRecordset->MoveLast();
	ReadData();
	ResetControls();
	Invalidate();		
}




void CData_Disp1Dlg::OnDatetimechangeDatetimepickerBitrhday(NMHDR* pNMHDR, LRESULT* pResult) 
{
	// TODO: Add your control notification handler code here
	m_bModify = TRUE;
	m_btnSave.EnableWindow();	
	*pResult = 0;
}

void CData_Disp1Dlg::OnButtonSelPhoto() 
{
	// TODO: Add your control notification handler code here
	static char BASED_CODE szFilter[] = "BMP Files (*.bmp)|*.bmp|All Files (*.*)|*.*||";
	CFileDialog dlg(TRUE,"BMP",NULL,  OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,szFilter);
	if(dlg.DoModal() == IDOK)
	{
		CString pathname = dlg.GetPathName();
		DestroyPhoto();
		LoadBMPFile(pathname);
		m_hPhotoBitmap = BufferToHBITMAP();
		m_bModify = TRUE;
		m_btnSave.EnableWindow();
		Invalidate();
	}	
}
/////////////清除分配的对象/////////////
void CData_Disp1Dlg::DestroyPhoto()
{
	if(m_hPhotoBitmap)
	{
		DeleteObject(m_hPhotoBitmap);
		m_hPhotoBitmap = NULL;
	}
	if(m_pBMPBuffer)
	{
		delete m_pBMPBuffer;
		m_pBMPBuffer = NULL;
	}
}

/////////////加载BMP文件到内存//////////////
BOOL CData_Disp1Dlg::LoadBMPFile(const char *pBMPPathname)
{
	CFile file;
	if( !file.Open( pBMPPathname, CFile::modeRead) )
		return FALSE;
	m_nFileLen = file.GetLength();
	m_pBMPBuffer = new char[m_nFileLen + 1];
	if(!m_pBMPBuffer)
		return FALSE;
	if(file.ReadHuge(m_pBMPBuffer,m_nFileLen) != m_nFileLen)
		return FALSE;
	return TRUE;
}

///////////将内存中的BMP文件内容转换到HBITMAP///////
HBITMAP CData_Disp1Dlg::BufferToHBITMAP()
{
	HBITMAP				hBmp;
	LPSTR				hDIB,lpBuffer = m_pBMPBuffer;
	LPVOID				lpDIBBits;
	BITMAPFILEHEADER	bmfHeader;
	DWORD				bmfHeaderLen;

	bmfHeaderLen = sizeof(bmfHeader);
	strncpy((LPSTR)&bmfHeader,(LPSTR)lpBuffer,bmfHeaderLen);

	if (bmfHeader.bfType != (*(WORD*)"BM")) return NULL;//我copy《Windows程序设计》上的做法。
	hDIB = lpBuffer + bmfHeaderLen;
	BITMAPINFOHEADER &bmiHeader = *(LPBITMAPINFOHEADER)hDIB ;
	BITMAPINFO &bmInfo = *(LPBITMAPINFO)hDIB ;

	lpDIBBits=(lpBuffer)+((BITMAPFILEHEADER *)lpBuffer)->bfOffBits;//这行功能和上面被注释掉的代码相同，容易理解。
	CClientDC dc(this);
	hBmp = CreateDIBitmap(dc.m_hDC,&bmiHeader,CBM_INIT,lpDIBBits,&bmInfo,DIB_RGB_COLORS);
	return hBmp;
}

BOOL CData_Disp1Dlg::DestroyWindow() 
{
	// TODO: Add your specialized code here and/or call the base class
	DestroyPhoto();	
	return CDialog::DestroyWindow();
}

void CData_Disp1Dlg::OnButtonEdit() 
{
	// TODO: Add your control notification handler code here
	//修改输入控件状态
	m_editName.EnableWindow();
	m_btnSex.EnableWindow();
	m_ctrlBirth.EnableWindow();
	m_editAddress.EnableWindow();
	m_editPhone.EnableWindow();
	m_editRemark.EnableWindow();
    m_editEmail.EnableWindow();
	//修改操作按钮状态
	m_btnDelete.EnableWindow(FALSE);
	m_btnSelPhoto.EnableWindow();
    m_btnSave.EnableWindow();
	m_btnAdd.EnableWindow(FALSE);
    m_btnEdit.EnableWindow(FALSE);
    //处于修改状态
	m_bModify = TRUE;
	UpdateData(FALSE);
	Invalidate();
}