OPENFILENAME and multiple files.

Hey,

I've set up my OPENFILENAME sturctures' flags to include the option OFN_ALLOWMULTISELECT but i'm having trouble. What i want to do is give the option for the user to select multiple files which will then be displayed in a listbox, however, when i select more than one file all that shows up in the listbox is the root directory.

For example, if i choose two or more files from C:\ - for example foo.txt and bar.txt - and send the lpstrFile member to the listbox (using SendDlgItemMessage) the only think that will show up will be "C:\" instead of the two files. However, if i select them each seperately they both appear just fine, one after the other.

I guess i'm probably missing something but i don't know what, so any help would be apprecited. Thanks.

From memory (havent checked), the string returned from a multiselect operation is made up of each filepath, and each is seperated by a NULL....so displaying the string just gives the first element

Do a little pointer arthmatic to tokenise the string

Could you maybe give me an example, strings aren't exactly my forte ;)

Thanks.

Quote:

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Originally posted by Fordy
From memory (havent checked), the string returned from a multiselect operation is made up of each filepath, and each is seperated by a NULL....so displaying the string just gives the first element

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Actually, the first string contains the current directory, but that was more than close enough for memory recall without checking.

Code:

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char *aString;
vector<char *> selectedStrings;
OPENFILENAME ofn;

...allow the user to select multiple files...

// on return, the strings are separated by NULL's; use strlen() and some pointer
// trickery to get at each string.  The entire sequence is terminated by
// two NULL characters.

// get a pointer to the first string; ofn.lpstrFile without the offset
// points to a string containing only the current directory
aString = ofn.lpstrFile + ofn.nFileOffset;

do {
  selectedStrings.push_back(aString);
  aString += strlen(aString) + 1;                        // reset pointer to just beyond the last NULL
} while (*aString != '\0');                              // while no double-NULL detected

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Thanks a lot for the example, it really helped clear things up. But is there a way to do it in straight C without using the vector?

edit: nevermind, i got it now, thanks ;)