MFC项目有关打印功能（支持分页打印）

如下代码运行的环境简述：
MFC的对话框界面上创建一个按钮，点击这个按钮打印界面上CListCtrl控件上现实的内容。
如果这段代码对你有帮助，请点个赞，给我一点小小鼓励，共同进步~~

void CMaxValueDlg::OnBnClickedButton4()
{//选定默认打印机CString strPrintDevice;TCHAR szBuffer[1024] = { 0 };DWORD length = 1024;int ret = ::GetDefaultPrinter(szBuffer, &length);if (ret == FALSE){ret = ::GetLastError();m_msg.Format("打印失败...");UpdateData(false);return ;}     else{strPrintDevice = szBuffer;}/*if (ret == ERROR_INSUFFICIENT_BUFFER){CString temp;temp.Format(_T("%d"), length);AfxMessageBox(CString(_T("ERROR_INSUFFICIENT_BUFFER")) + _T(" the real size is ") + temp);}else if (ret == ERROR_FILE_NOT_FOUND){AfxMessageBox(_T("ERROR_FILE_NOT_FOUND"));}*///准备打印的信息CString wndTm; wndTm.Format("%d", m_UnitWnd);CString retNum; retNum.Format("%d", m_MaxRetNum);CString startTm = m_date_s.Format("%Y-%m-%d  %H:%M:%S");CString endTm = m_date_e.Format("%Y-%m-%d  %H:%M:%S");CString lockStatus;if (m_bNeedLockCheck)lockStatus.Format("%d", i_locktime);elselockStatus = "否";CString fLimit; if (m_bCheckLimit)fLimit.Format("%f", m_fLimit);elsefLimit = "否";//this->UpdateData();CString strMessage;CString title;title.Format("%s-电流极大值统计表", c_name);strMessage.AppendFormat("              %s \t\t\r\n", title);strMessage.Append("---------------------------------------------------------------\r\n");strMessage.AppendFormat("起始日期     %s \t\t\r\n", startTm);strMessage.AppendFormat("截止日期     %s \t\t\r\n", endTm);strMessage.AppendFormat("单元数据窗   %s \t\t\r\n", wndTm);strMessage.AppendFormat("最大值数量   %s \t\t\r\n", retNum);strMessage.AppendFormat("过滤闭锁     %s \t\t\r\n", lockStatus);strMessage.AppendFormat("过滤极差     %s \t\t\r\n\r\n", fLimit);strMessage.Append("---------------------------------------------------------------\r\n");strMessage.Append(" 序号    极大值    相别    不平衡度            记录时间            \r\n");strMessage.Append("---------------------------------------------------------------\r\n");CString buf[10000][6]; int count = c_list.GetItemCount();int colm = c_list.GetHeaderCtrl()->GetItemCount();for (int i = 0; i < count; i++) {for (int j = 0; j < colm; j++) {buf[i][j] = c_list.GetItemText(i, j);}strMessage.AppendFormat("%5d    %s     %s      %s        %s        \r\n", atoi(buf[i][0]), buf[i][1], buf[i][2], buf[i][3], buf[i][4]);}DWORD dwFlag = PD_ALLPAGES | PD_NOPAGENUMS | PD_USEDEVMODECOPIES | PD_HIDEPRINTTOFILE;  //打印配置界面的按钮可用性，因为后台打印，其实这个配置没什么意义  CPrintDialog pPrintdlg(FALSE, dwFlag, this);                                            //CPrintDialog实例化，因为MFC的打印设备无关性，可以理解为这就是一台打印机  HGLOBAL hDevMode = NULL;HGLOBAL hDevNames = NULL;if (GetPrinterDevice(strPrintDevice.GetBuffer(0), &hDevNames, &hDevMode))               //获得指定打印机的配置、名字  AfxGetApp()->SelectPrinter(hDevNames, hDevMode);elseAfxMessageBox(_T("Failed to select custom printer"));strPrintDevice.ReleaseBuffer();pPrintdlg.m_pd.hDevMode = hDevMode;                                                     //让pPrintdlg使用我们指定的打印机  pPrintdlg.m_pd.hDevNames = hDevNames;CDC dc;dc.Attach(pPrintdlg.CreatePrinterDC());                                                 //后台打印创建法，如果需要弹出打印对话框，用DoModal  DOCINFO di;di.cbSize = sizeof(DOCINFO);di.lpszDocName = _T("电流极大值统计表打印");di.lpszDatatype = NULL;di.lpszOutput = NULL;di.fwType = 0;dc.StartDocA(&di);dc.StartPage();dc.SetMapMode(MM_TEXT);CRect recPrint(0, 0, dc.GetDeviceCaps(LOGPIXELSX), dc.GetDeviceCaps(LOGPIXELSY));dc.DPtoLP(&recPrint);dc.SetWindowOrg(0, 0);dc.SetTextAlign(TA_TOP | TA_LEFT);CFont newFont;VERIFY(newFont.CreatePointFont(160, _T("宋体"), &dc));dc.SelectObject(&newFont);CString strPrint;int nIndex = 0;int x = 50;int y = 50;/*CSize textSize;textSize = dc.GetTextExtent(_T("00"), 2);*///根据当前字体的宽、高，后面以此高度为行高  int sn = 0;//开始打印//BOOL bPrinting = dc.StartDoc(&di);//dc.StartPage();while ((nIndex = strMessage.Find(_T("\r\n"))) > -1)                  //将strMessage内容打印，支持换行，一次换行等于'\r\n'，所以在开头strMessage += _T("\r\n")  {CSize textSize;textSize = dc.GetTextExtent(_T("00"), 2);int abc = strMessage.Find(_T("\r\n"));int ppp = sn++;strPrint = strMessage.Left(nIndex);strMessage = strMessage.Mid(nIndex + 2);         dc.TextOutA(x, y, strPrint);y += textSize.cy;    if (sn % 50 == 0){dc.EndPage();    dc.StartPage();         x = 50;y = 50;            }}dc.EndPage();//if (bPrinting)//{//    dc.EndDoc();//}//else//{//  dc.AbortDoc();//}       newFont.DeleteObject();dc.EndPage();dc.EndDoc();DeleteDC(dc.Detach());m_msg.Format("打印完毕...");UpdateData(false);
}bool CMaxValueDlg::GetPrinterDevice(LPTSTR pszPrinterName, HGLOBAL* phDevNames, HGLOBAL* phDevMode)
{// TODO: 在此处添加实现代码.//if NULL is passed, then assume we are setting app object's  //devmode and devnames  if (phDevMode == NULL || phDevNames == NULL)return FALSE;// Open printer  HANDLE hPrinter;if (OpenPrinter(pszPrinterName, &hPrinter, NULL) == FALSE)return FALSE;// obtain PRINTER_INFO_2 structure and close printer  DWORD dwBytesReturned, dwBytesNeeded;GetPrinter(hPrinter, 2, NULL, 0, &dwBytesNeeded);PRINTER_INFO_2* p2 = (PRINTER_INFO_2*)GlobalAlloc(GPTR,dwBytesNeeded);if (GetPrinter(hPrinter, 2, (LPBYTE)p2, dwBytesNeeded,&dwBytesReturned) == 0) {GlobalFree(p2);ClosePrinter(hPrinter);return FALSE;}ClosePrinter(hPrinter);// Allocate a global handle for DEVMODE  HGLOBAL  hDevMode = GlobalAlloc(GHND, sizeof(*p2->pDevMode) +p2->pDevMode->dmDriverExtra);ASSERT(hDevMode);DEVMODE* pDevMode = (DEVMODE*)GlobalLock(hDevMode);ASSERT(pDevMode);// copy DEVMODE data from PRINTER_INFO_2::pDevMode  memcpy(pDevMode, p2->pDevMode, sizeof(*p2->pDevMode) +p2->pDevMode->dmDriverExtra);GlobalUnlock(hDevMode);// Compute size of DEVNAMES structure from PRINTER_INFO_2's data  DWORD drvNameLen = lstrlen(p2->pDriverName) + 1;  // driver name  DWORD ptrNameLen = lstrlen(p2->pPrinterName) + 1; // printer name  DWORD porNameLen = lstrlen(p2->pPortName) + 1;    // port name  // Allocate a global handle big enough to hold DEVNAMES.  HGLOBAL hDevNames = GlobalAlloc(GHND,sizeof(DEVNAMES) +(drvNameLen + ptrNameLen + porNameLen) * sizeof(TCHAR));ASSERT(hDevNames);DEVNAMES* pDevNames = (DEVNAMES*)GlobalLock(hDevNames);ASSERT(pDevNames);// Copy the DEVNAMES information from PRINTER_INFO_2  // tcOffset = TCHAR Offset into structure  int tcOffset = sizeof(DEVNAMES) / sizeof(TCHAR);ASSERT(sizeof(DEVNAMES) == tcOffset * sizeof(TCHAR));pDevNames->wDriverOffset = tcOffset;memcpy((LPTSTR)pDevNames + tcOffset, p2->pDriverName,drvNameLen * sizeof(TCHAR));tcOffset += drvNameLen;pDevNames->wDeviceOffset = tcOffset;memcpy((LPTSTR)pDevNames + tcOffset, p2->pPrinterName,ptrNameLen * sizeof(TCHAR));tcOffset += ptrNameLen;pDevNames->wOutputOffset = tcOffset;memcpy((LPTSTR)pDevNames + tcOffset, p2->pPortName,porNameLen * sizeof(TCHAR));pDevNames->wDefault = 0;GlobalUnlock(hDevNames);GlobalFree(p2);   // free PRINTER_INFO_2  // set the new hDevMode and hDevNames  *phDevMode = hDevMode;*phDevNames = hDevNames;return TRUE;
}

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