INFO: Write() Function

ID: Q92803

The information in this article applies to:

The Microsoft Foundation Classes (MFC), used with:
- Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 2.1, 4.0, 4.1, 7.0
- Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5, 1.51, 1.52

SUMMARY

In an application developed with the Microsoft Foundation Classes (MFC) that uses the CFile class, the Write() member function may appear not to correctly process the carriage return-linefeed (CR/LF) combination unless both the carriage return and linefeed are explicitly stated.

For example, the following code


   CFile file;
   // ...
   file.Write("Hello\n", 6);
   file.Write("Hello\n", 6);

produces the following output: ------------------- Hello Hello -------------------
However, the following code


   file.Write("Hello\n\r", 7);
   file.Write("Hello\n\r", 7);

produces the following output: ------------------- Hello Hello -------------------

MORE INFORMATION

When an application uses the CStdioFile class derived from CFile, an application can open a file in either text mode or binary mode. Using a CStdioFile object is the preferred method to place a CR/LF combination into a file. However, if the application must use a CFile object, a CR/LF combination may be explicitly output as demonstrated above.

Additional query words: kbinf 7.00 1.00 1.50 2.00 2.10 2.50 2.51 2.52 3.00 3.10 4.00 4.10

Keywords : kbFileIO kbMFC kbVC100 kbVC150 kbVC152 kbGrpMFCATL
Version : winnt:1.0,2.0,2.1,4.0,4.1,7.0
Platform : winnt
Issue type : kbinfo