MFC打印技术CPrintDlg

// 打印小票
void COnTheStageDlg::Print(CString sYje, CString sSje, CString sZl)
{
    CTime time = CTime::GetCurrentTime();
    CString sql, ph, xsph;
    //判断今天的票号,并递增
    sql.Format(_T("select XSPH from TB_SELL where TO_CHAR(XSSJ,‘MMDDYYYY‘)=‘%s‘ order by XSPH"), time.Format("%m%d%Y"));
    AdoConn adoConn;
    adoConn.InitConnect();
    adoConn.m_pRs = adoConn.GetRecordSet((_bstr_t)sql);
    if (!adoConn.m_pRs->adoEOF)
    {
        adoConn.m_pRs->MoveLast();
        ph = (TCHAR*)(_bstr_t)adoConn.m_pRs->GetCollect("XSPH");
        xsph.Format(_T("XS%s%04d"), time.Format("%y%m%d"), _ttoi(ph.Right(4)) + 1);
    }
    else
        xsph.Format(_T("XS%s0001"), time.Format("%y%m%d"));

    
    //插入记录到数据库 表 tb_sell
    CString spbh, spmc, spjm, splb, txm, xssl, xsdj, xssj;
    for (int i = 0, n = m_Grid.GetItemCount(); i<n; i++)
    {
        spbh = m_Grid.GetItemText(i, 0);
        spmc = m_Grid.GetItemText(i, 1);
        spjm = m_Grid.GetItemText(i, 2);
        splb = m_Grid.GetItemText(i, 3);
        txm = m_Grid.GetItemText(i, 4);
        xssl = m_Grid.GetItemText(i, 5);
        xsdj = m_Grid.GetItemText(i, 6);
        sql.Format(_T("insert into TB_SELL(XSPH,SPBH,SPMC,SPJM,SPLB,TXM,XSSL,SPDJ,XSSJ)\
            values(‘%s‘,‘%s‘,‘%s‘,‘%s‘,‘%s‘,‘%s‘,%d,%f,TO_DATE(‘%s‘,‘MMDDYYYY HH24:MI‘))"), 
            xsph, spbh, spmc, spjm, splb, txm, _ttoi(xssl), _ttof(xsdj), time.Format("%m%d%Y %H:%M"));
        adoConn.ExecuteSql((_bstr_t)sql);
    }
    adoConn.ExitConnect();

    const int MAX_SIZE_SP = 100;//所能打印的商品最大数量
    const int MAX_SIZE_COL = 5; //最大列数
    const int HEIGHT_ROW = 20;//每行的标准高度
    const int MAX_SIZE_ROW = 40;//每页的最大行数
    const int LEFT_LOC = 5;//打印的左边位置
    const int RIGHT_LOC = 220;//打印的最右边的坐标位置
    const int TOP_LOC = 10;//打印的最上边的坐标位置
    const int BOTTOM_LOC = TOP_LOC + MAX_SIZE_ROW * HEIGHT_ROW;//打印的最下边的坐标位置，超过了换下一页（40行换页）
    
    CDC* pDC = GetDC();
    int screenx = pDC->GetDeviceCaps(LOGPIXELSX);//沿屏幕宽度每逻辑英寸的像素数，在多显示器系统中，该值对所显示器相同；
    int screeny = pDC->GetDeviceCaps(LOGPIXELSY);//沿屏幕高度每逻辑英寸的像素数，在多显示器系统中，该值对所显示器相同；
    CPrintDialog m_printdlg(FALSE);
    if (m_printdlg.DoModal() == IDOK)
    {
        CDC dc;
        dc.Attach(m_printdlg.GetPrinterDC());
        //查询打印设备的信息，每逻辑英寸的像素数
        int printx = dc.GetDeviceCaps(LOGPIXELSX);
        int printy = dc.GetDeviceCaps(LOGPIXELSY);
        double ratex = (double)(printx) / screenx;
        double ratey = (double)(printy) / screeny;

        CString str[MAX_SIZE_SP + 1][MAX_SIZE_COL];
        int i = 0;
        str[i][0] = _T("商品编号");
        str[i][1] = _T("商品名称");
        str[i][2] = _T("销售数量");
        str[i][3] = _T("销售单价");
        str[i][4] = _T("销售金额");
        ++i;
        double sum = 0;
        CString strsum;
        for (int nCount = m_Grid.GetItemCount(); i <= (MAX_SIZE_SP < nCount ? MAX_SIZE_SP : nCount); i++)
        {
            str[i][0] = m_Grid.GetItemText(i - 1, 0);//商品编号
            str[i][1] = m_Grid.GetItemText(i - 1, 1);//商品名称
            str[i][2] = m_Grid.GetItemText(i - 1, 5);//销售数量
            str[i][3] = m_Grid.GetItemText(i - 1, 6);//销售单价
            str[i][4].Format(_T("%0.2f"), _ttoi(str[i][2])*_ttof(str[i][3]));//数量*单价
        }
        dc.StartDoc(_T("printstart"));
        CFont pfont;
        pfont.CreatePointFont(110, L"宋体", &dc);
        int x, y;
        x = LEFT_LOC; y = TOP_LOC;
        dc.TextOut((int)ratex * x, (int)ratey * y, _T("XX超市"));
        y = y + HEIGHT_ROW;
        dc.TextOut((int)ratex * x, (int)ratey * y, _T("销售票号：") + xsph);
        y = y + HEIGHT_ROW;
        dc.TextOut((int)ratex * x, (int)ratey * y, _T("销售时间：") + time.Format("%Y-%m-%d %H:%M:%S"));
        y += HEIGHT_ROW;
        //画两根线
        y += 2;
        dc.MoveTo((int)ratex * LEFT_LOC, (int)ratey * y);
        dc.LineTo((int)ratex * RIGHT_LOC, (int)ratey * y);
        y += 2;
        dc.MoveTo((int)ratex * LEFT_LOC, (int)ratey * y);
        dc.LineTo((int)ratex * RIGHT_LOC, (int)ratey * y);
        y += 2;

        //打印所有商品信息
        for (int k = 0; k < i; ++k)
        {
            if (y>BOTTOM_LOC)
            {
                y = TOP_LOC;
                dc.EndPage();
                dc.StartPage();
            }
            for (int j = 0; j < MAX_SIZE_COL; j++)
            {
                if (j < 2)
                {
                    dc.TextOut((int)ratex*(LEFT_LOC + j * 80), (int)ratey * y, str[k][j]);
                }
                else
                {
                    dc.TextOut((int)ratex*(LEFT_LOC + (j - 2) * 80), (int)ratey * (y + HEIGHT_ROW), str[k][j]);
                }
            }
            y += 2 * HEIGHT_ROW;

            if (0 == k)
            {//画一条红色的虚线
                CPen pen(PS_DOT, 1, RGB(200, 0, 0));
                CPen* pOld = dc.SelectObject(&pen);
                y += 1;
                dc.MoveTo((int)ratex * LEFT_LOC, (int)ratey * y);
                dc.LineTo((int)ratex * RIGHT_LOC, (int)ratey * y);
                dc.SelectObject(pOld);
                y += 1;
            }
        }
        //画两根线
        y += 2;
        dc.MoveTo((int)ratex * LEFT_LOC, (int)ratey * y);
        dc.LineTo((int)ratex * RIGHT_LOC, (int)ratey * y);
        y += 2;
        dc.MoveTo((int)ratex * LEFT_LOC, (int)ratey * y);
        dc.LineTo((int)ratex * RIGHT_LOC, (int)ratey * y);
        y += 2;

        //打印金额
        CRect rc((int)ratex * LEFT_LOC, (int)ratey * y, (int)ratex * RIGHT_LOC, (int)ratey * (y + HEIGHT_ROW));
        dc.DrawText(_T("应收金额：") + sYje, rc, DT_RIGHT);

        CFont font2; 
        font2.CreatePointFont(1200, _T("楷体"));
        CFont* pOld = dc.SelectObject(&font2);
        y += HEIGHT_ROW;
        CString strTemp = _T("实收：") + sSje;
        CSize sz = dc.GetTextExtent(strTemp);
        rc.SetRect((int)ratex * LEFT_LOC, (int)ratey * y, (int)ratex * RIGHT_LOC, (int)ratey * y + sz.cy);
        dc.DrawText(strTemp, rc, DT_RIGHT);
        dc.SelectObject(pOld);
        
        
        rc.SetRect((int)ratex * LEFT_LOC, (int)ratey * y + sz.cy + 2, (int)ratex * RIGHT_LOC, (int)ratey * (y + HEIGHT_ROW) + sz.cy + 2);
        dc.DrawText(_T("找零：") + sZl, rc, DT_RIGHT);

        //谢谢惠顾，欢迎下次光临
        int loc = (int)ratey * (y + HEIGHT_ROW) + sz.cy + 2;
        rc.SetRect((int)ratex * LEFT_LOC, loc, (int)ratex * RIGHT_LOC, loc + (int)ratey * HEIGHT_ROW);
        dc.DrawText(_T("谢谢惠顾，欢迎下次光临"), rc, DT_CENTER);

        dc.EndDoc();
        pfont.DeleteObject();
    }
    ReleaseDC(pDC);
}