Get File size from CFileDialog

Question

I am newbie from Visual Studio C++. I am using CFileDialog to get the file name and file path from user input. and now i want to use progress control that is loading process and user have to wait depend on your input file size. Now I got the file name and file path by using CFileDialog but I don't know how to get a user input file size.

I am using below method and it always return zero.

int FileSize(const char * szFileName)
{
struct stat fileStat;
int err = stat(szFileName, &fileStat);
if (0 != err) 
    return 0;
return fileStat.st_size;
}

Please suggest me if you have a better solution to get a file size.

Thanks you very much.

https://msdn.microsoft.com/en-us/library/b569d0t4.aspx – Hans Passant May 15 '15 at 08:34 — Hans Passant, May 15 '15 at 08:34

score 0 · Accepted Answer · edited May 23 '17 at 10:26

The standard portable way to do it would be:

long long sz;   // int would be to small for many files ! 
ifstream ifs(test);
if(!ifs) 
    return 0;   // when file couldn't be opened
ifs.seekg(0, ios::end);   
sz = ifs.tellg();
return sz;

The native windows approach would be to use GetFileSize().

But if you look at an MFC alternative that doesn't open the file first, you may look at this SO question.

Get File size from CFileDialog

1 Answers1