helping for writing and reading with only one file

[d_stranz]

Windows will not allow you to change an EXE file while it is running, so you cannot add new text to the same file as your EXE. You have to use a separate file.

I don't understand why you think you need 3 files. If the content is always 500 doubles and ints, then just write the doubles and then the ints to the same file. If you want to use QDataStream to read and write the strings, then use QDataStream to read and write the arrays of doubles and ints also.

[anda_skoa]

If the program needs a file for input on startup, you could do this:

1) check if the file exists in the user's data location
2) if not, extract from resource to the user's data location
3) load file from the user's data location

Writing can then always happen to that file.

Cheers,
_

[Alex22]

If the program needs a file for input on startup, you could do this:

1) check if the file exists in the user's data location
2) if not, extract from resource to the user's data location
3) load file from the user's data location

Writing can then always happen to that file.

Cheers,
_

Really thanks, nice way. but i have some questions:
- how could extract from resource? (by this i could read/write and files are not beside of the ".exe")
- is it possible to load from the user's data location to resource?

[anda_skoa]

- how could extract from resource? (by this i could read/write and files are not beside of the ".exe")

QFIle::copy() should work, otherwise readAll() on a QFile that has the resource path and writing that into the QFile at the data location.

- is it possible to load from the user's data location to resource?

Not sure what you mean.
QFile based loading is transparent on whether the path is a resource or a local file.

With the described "extract" approach you would never read from the resource directly, always from the local file.

Cheers,
_

[Alex22]

If the content is always 500 doubles and ints, then just write the doubles and then the ints to the same file. If you want to use QDataStream to read and write the strings, then use QDataStream to read and write the arrays of doubles and ints also.

Thanks for your answering. Yes the content is always 500 "doubles" and "ints" and 500 names in a "QStringList" (that length of each name is not constant and certain). please help me to write/read only one file in this way. thanks a lot

[anda_skoa]

Simple make the write() and read() calls on the same file?

Cheers,
_