Article: Q88769
Product(s): Microsoft C Compiler
Version(s): winnt:1.0,2.0,2.1,2.2,4.0
Operating System(s):
Keyword(s): kbFileIO kbMFC kbVC100 kbVC150 kbVC200 kbVC400 kbGrpDSMFCATL
Last Modified: 03-MAY-2001
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The information in this article applies to:
- The Microsoft Foundation Classes (MFC), used with:
- Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5, 1.51, 1.52
- Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 2.1, 2.2, 4.0
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SUMMARY
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The Microsoft Foundation Classes (MFC) provide a CFileException class. The
CFileException class includes public data members that contain operating- system
errors and C Run-time errors that may be generated by certain file operations.
MORE INFORMATION
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The CFile and CStdioFile classes may throw a CFileException when certain error
conditions occur; however, these classes do not throw a CFileException when the
end of file is reached. If an application using the CFile or CStdioFile class
needs to check for the end-of-file condition when reading from a file, the
return values from the Read() and ReadString() member functions should be
checked.
CFile::Read returns the actual number of bytes read. If this number is less than
the bytes requested, then the end of file has been reached.
CStdioFile::ReadString returns a NULL pointer when the end of file has been
reached.
Additional query words: EOF TRY CATCH
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Keywords : kbFileIO kbMFC kbVC100 kbVC150 kbVC200 kbVC400 kbGrpDSMFCATL
Technology : kbAudDeveloper kbMFC
Version : winnt:1.0,2.0,2.1,2.2,4.0
Issue type : kbhowto
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