Solved

Printing a text file

Posted on 1999-01-06
3
211 Views
Last Modified: 2013-11-20
How can I send a text file directly to a printer from inside my program?  I will let the user select the printer using the standard printer dialog box.
0
Comment
Question by:scs1
3 Comments
 
LVL 4

Expert Comment

by:pagladasu
ID: 1327318
Use the C function mktemp() to create a unique filename.
Copy the file to be printed to this unique filename.
Use the API ::SpoolFile() to print the file
0
 
LVL 1

Accepted Solution

by:
ATucker earned 50 total points
ID: 1327319
Here's the code I've used to do this in the past....


// get the file name from somewhere...

hFile = OpenFile (szFileName, (LPOFSTRUCT)&OfStruct, OF_READ);
                if ( !hFile )
                {
                  MessageBox (hwndExtension, "Error opening file.", "File Open Error", MB_OK | MB_ICONEXCLAMATION);
                  break;
                }
               
               
                fstat(hFile, &FileStatus);
               
                /* only allow files <= 64K */
                if ( FileStatus.st_size > 64000 )
                {
                  MessageBox (hwndExtension, "File is too large. (Must me less than 64000 bytes)", "File Size Error", MB_OK | MB_ICONEXCLAMATION);
                  break;
                }
                       

                /* Allocate edit buffer to the size of the file + 1 */
            szTextBuffer = (char *)malloc(((int)FileStatus.st_size + 1));
           
            if ( szTextBuffer == NULL )
            {
                  MessageBox (hwndExtension, "Could not allocate buffer to read file.", "Memory Allocation Error", MB_OK | MB_ICONEXCLAMATION);
                  break;
            }

             IOStatus = read(hFile, szTextBuffer, (unsigned int)FileStatus.st_size);
                close(hFile);
           
            if ( IOStatus != (int)FileStatus.st_size )
            {
               MessageBox (hwndExtension, "Error reading file.", "File Read Error", MB_OK | MB_ICONEXCLAMATION);
               free(szTextBuffer);
               break;
            }
   
            // get an HDC to the default printer            
            // NOTE: You can replace this with however you want
            // to select a printer...    
            hdcPrinter = GetDefaultPrinterDC();
           
            if ( hdcPrinter == 0 )
            {
               MessageBox (hwndExtension, "Must have a default printer installed.", "Printer Error", MB_OK | MB_ICONEXCLAMATION);
               free(szTextBuffer);
               break;
            }              

            di.cbSize = sizeof(DOCINFO);
            di.lpszDocName = szFileTitle;                                    
            di.lpszOutput = NULL;
           
            if ( StartDoc(hdcPrinter, &di) == SP_ERROR )
            {
               MessageBox (hwndExtension, "Error starting print job.", "Print Job Error", MB_OK | MB_ICONEXCLAMATION);
               free(szTextBuffer);
               DeleteDC(hdcPrinter);
               break;
            }

            PrintBuffer(hdcPrinter, szTextBuffer);
                                       
            if ( EndDoc(hdcPrinter) < 0 )
            {
               MessageBox (hwndExtension, "Error ending print job.", "Print Job Error", MB_OK | MB_ICONEXCLAMATION);
               free(szTextBuffer);
               DeleteDC(hdcPrinter);
               break;
            }
           
            DeleteDC(hdcPrinter);
            free(szTextBuffer);

///.....


 
/*
   Return an HDC for the default printer in the WINDOWS.INI file
   
   Stolen form Petzold's Programming Windows 2ed. pg. 721
   
*/
HDC GetDefaultPrinterDC(void)
{
   char szPrinter[80];
   char *szDevice, *szDriver, *szOutput;

   GetProfileString("WINDOWS", "DEVICE", ",,,", szPrinter, 80);
   
   szDevice = strtok(szPrinter, ",");
   szDriver = strtok(NULL, ",");
   szOutput = strtok(NULL, ",");
   
   if ( !szDevice || !szDriver || !szOutput )
      return 0;
   else
      return CreateDC( szDriver, szDevice, szOutput, NULL );
     
}


/*
   Print the passed text buffer to the passed printer DC.
   
   NOTE: the passed szBuffer is probably trashed by strtok and shouldn't
   be relied upon after printing.
   
   Basic idea stolen from Petzold's Programming Windows 2ed. pg. 757
   
*/
void PrintBuffer(HDC hdcPrinter, char *szBuffer)
{

   int yChar, nCharsPerLine, nLinesPerPage, nTotalLines, nPage, nLine, nLineNum = 0;
   int nTotalPages;
   char *pBuffer;
   TEXTMETRIC tm;
   
   nTotalLines = CountNewLines(szBuffer);
   if ( nTotalLines == 0 )
      return;
     
   GetTextMetrics(hdcPrinter, &tm);
   yChar = tm.tmHeight + tm.tmExternalLeading;
   
   nCharsPerLine = GetDeviceCaps(hdcPrinter, HORZRES) / tm.tmAveCharWidth;
   nLinesPerPage = GetDeviceCaps(hdcPrinter, VERTRES) / yChar;
   nTotalPages = (nTotalLines + nLinesPerPage - 1) / nLinesPerPage;
   

   pBuffer = strtok(szBuffer, "\n");   // get the first line
   for ( nPage = 0; nPage < nTotalPages; nPage++ )
   {
      for( nLine = 0; nLine < nLinesPerPage && nLineNum < nTotalLines; nLine++, nLineNum++ )
      {
     
         if ( pBuffer == NULL )  // stupid sanity check
            break;
         
         // kill CR chars  
         if ( strlen(pBuffer) && pBuffer[strlen(pBuffer)-1] == '\r' )            
            pBuffer[strlen(pBuffer)-1] = 0;      
                       
         TextOut(hdcPrinter, 0, yChar * nLine, pBuffer, strlen(pBuffer));
         pBuffer = strtok(NULL, "\n"); // get the next line            
      }
     
      Escape(hdcPrinter, NEWFRAME, 0, NULL, NULL);
     
      if ( pBuffer == NULL )  // stupid sanity check
         break;

   }
   
}

/*
   Count the number of newlines in the buffer.
*/
int CountNewLines(const char *szText)
{
   int TotalLines = 0;
   size_t i;
   
   for(i = 0; i < strlen(szText); i++)
   {
      if ( szText[i] == '\n' )
         TotalLines++;
   }
   
   return TotalLines;  
}

0
 

Author Comment

by:scs1
ID: 1327320
it looks like a may not need this option anymore.  However, thanks for the help.  It seems to be very detailed.  I did cut and past the code and there seems to be some missing declarations.  Thanks for the help
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Expand macro to include alternate header placement and naming 5 66
cat dog challenge 18 124
withoutTen challenge 14 100
scoreUp challenge 14 57
In this article, I'll describe -- and show pictures of -- some of the significant additions that have been made available to programmers in the MFC Feature Pack for Visual C++ 2008.  These same feature are in the MFC libraries that come with Visual …
If you use Adobe Reader X it is possible you can't open OLE PDF documents in the standard. The reason is the 'save box mode' in adobe reader X. Many people think the protected Mode of adobe reader x is only to stop the write access. But this fe…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
This is used to tweak the memory usage for your computer, it is used for servers more so than workstations but just be careful editing registry settings as it may cause irreversible results. I hold no responsibility for anything you do to the regist…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now