Thread: open file error

hi all,

i 'm working on mfc program and read text file using createfile()

Code:

CString debug;
CString myfile;
myfile = "\\D:\\text.txt";
HANDLE hFile = CreateFile(myfile.GetBuffer(10000), GENERIC_READ | GENERIC_WRITE, 
                   FILE_SHARE_READ,
                   NULL,
                   OPEN_ALWAYS,
                   FILE_ATTRIBUTE_NORMAL,
                   NULL);

myfile.ReleaseBuffer();
	

	if (INVALID_HANDLE_VALUE == hFile){// if setting/file not valid
		DWORD dw = GetLastError ();
		debug = "error";
		detail.DetailValue = debug;
	}else{detail.DetailValue = "open file succed";}

the file is not opened succed, and i caought the error msg: the data area passed to the system call is too small.
does anyone know this problem?
and can anyone provide succeeded way for reading file?
thanks much!

but i still cannot open the file when i cancel the getbuffer method...

now i use open() instead of createfile(), and it display the error: the system cannot find the path specified.
my path is: D:\\text.txt
my file does existed in this path.
does anyone know how to solve this?

thanks!

my file does existed in this path.
how's your problem? also the system can't find the file?

Originally Posted by novacain

Try,
after ensuring you can create / open a file at d:\

NOTE: changed the flags on CreateFile()

Code:

CString debug;
CString myfile;
myfile = "D:\\text.txt";
HANDLE hFile = ::CreateFile(myfile, GENERIC_READ|GENERIC_WRITE, 
                   0,
                   NULL,
                   OPEN_ALWAYS,
                   FILE_ATTRIBUTE_NORMAL,
                   NULL);

	if (INVALID_HANDLE_VALUE == hFile){// if setting/file not valid
		DWORD dw = GetLastError ();
		debug = "error";
		detail.DetailValue = debug;
	}else{detail.DetailValue = "open file succed";}

thanks for reply
the :: makes no difference.

i found that when i use smartdevice dialogue based application and use createFile function, the function cannot work but it works in windows based, does anyone meet this situation and how to solve it?
thanks!

i use emulator to run the application on window, so the d drive exists, and the file path is right...

hi all,

now i use the following code:

Code:

CString myfile = L"\\text.txt";
HANDLE hFile = CreateFile(myfile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0,NULL);

but i still caught the file not found error. as in pocket pc, i put the file into my device, and for running in emulator, and put the file into the c: drive, why it still can't read the file?
thanks!