Getting filesize using GetFileSizeEx

[reachb4]

Hi,
I am trying to get the file size using GetFileSizeEx function . howver i am getting exception at that point. Please tell me what i am doing wrong.

Also please tell me how to convert the return value to size in Megabyte.

HANDLE hFile = CreateFile(str.GetBuffer(), 0, 0, NULL, OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
		str.ReleaseBuffer();
		PLARGE_INTEGER pInteger=NULL;
		if (hFile != INVALID_HANDLE_VALUE)
		  {
       BOOL b= GetFileSizeEx(hFile, pInteger);// Excption here.
        
        CloseHandle(hFile);
     }

Regards,
John.

[VictorN]

You code doesn't compile. So what "exception" do you mean?

// Edit: btw, did you read the GetFileSizeEx documentation in MSDN?

[itsmeandnobodyelse]

You might think of using stat function instead. It is much easier and doesn't need an open of the file:

#include <sys/stat.h>

...
     struct stat fs = { 0 };
     if (stat((const char *)str, &fs) == 0)
     {
           size_t file_size = fs.st_size;
           ...
     }

[itsmeandnobodyelse]

Hi,
I am trying to get the file size using GetFileSizeEx function . howver i am getting exception at that point. Please tell me what i am doing wrong.

Also please tell me how to convert the return value to size in Megabyte.

HANDLE hFile = CreateFile(str.GetBuffer(), 0, 0, NULL, OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
		str.ReleaseBuffer();
		PLARGE_INTEGER pInteger=NULL;
		if (hFile != INVALID_HANDLE_VALUE)
		  {
       BOOL b= GetFileSizeEx(hFile, pInteger);// Excption here.
        
        CloseHandle(hFile);
     }

Regards,
John.

The pInteger must not be NULL. It must point to a LARGE_INTEGER where the size value could be stored into. It now crashes cause you passed a NULL pointer.

	
LARGE_INTEGER filesize = 0;
if (hFile != INVALID_HANDLE_VALUE)
{
    BOOL b= GetFileSizeEx(hFile, &filesize);

[reachb4]

Thank you all i find the resolution from the link.

[link]http://blog.kowalczyk.info/article/Get-file-size-under-windows.html[/link]

long GetFileSize(const TCHAR *fileName)
{
    BOOL                        fOk;
    WIN32_FILE_ATTRIBUTE_DATA   fileInfo;

    if (NULL == fileName)
        return -1;

    fOk = GetFileAttributesEx(fileName, GetFileExInfoStandard, (void*)&fileInfo);
    if (!fOk)
        return -1;
    assert(0 == fileInfo.nFileSizeHigh);
    return (long)fileInfo.nFileSizeLow;
}