mfc, Having Problems with CFile

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mfc >> Having Problems with CFile

by jim » Mon, 01 Dec 2003 20:15:56 GMT

Hello I am new at this . But CFile is giving me trouble. I got visual
studio 6 and . The CFile is in a function. that starts a file that
will be a report file. The program compiles ok, but runs and gives a
debug error and crashes help



int write_rpt(void)
{
// begin Report function


CFile fileMyFile;
char initFile[200];


fileMyFile.Open("c:\rept.html", CFile::modeCreate);


fileMyFile.Write(initFile, 15);


fileMyFile.Close();

return 0;

}




Thanks
Jim

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mfc >> Having Problems with CFile

by Boben » Mon, 01 Dec 2003 20:50:22 GMT


Problem is you didnt give permission to write while opening the file
(CFile::modeCreate | CFile::modeWrite).
catch the CFileException while using CFile.

Regards
-Boben







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mfc >> Having Problems with CFile

by number 94 » Tue, 02 Dec 2003 18:06:56 GMT

In addition to what Boben said, be careful with your filename as well.
"C:\rept.html" is likely to be interpreted as "C:" followed by escape
character '\r' (carriage return).






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Having Problems with CFile

by Charles Brown » Wed, 03 Dec 2003 21:39:37 GMT

I think you should also use "c:\\rept.html" in the call (\r in a string is
translated as a carriage return which could lead you program to think the
file name in question is simply "C:").

Be careful (as Boben says) to track all errors and exceptions when playing
with disk files or you can get some very unpleasant results.

Charlie






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