QFile write to specific line

[Sucharek]

Hi, I want to know how to write to a specific line in a file using QFile.

[mpergand]

In the first place I would say you can't (if you want to add something in the middle of the file)
unless you explain more what you want to do.

[J.Hilk]

@Sucharek you can't, and thats universal, you can only write the whole file, or seek to a specific point and overwrite everything after it.

Therefore inserting a line of text, technically not possible.
But you could get the effect.

[Sucharek]

This post is deleted!

[Sucharek]

@J-Hilk what specific point?
Like this: [stuff] ?
If thats possible, then that would work for me.

[jsulm]

@Sucharek said in QFile write to specific line:

what specific point?

Specific position in the file where next read/write operation will work
https://doc.qt.io/qt-5/qfiledevice.html#seek
But, as @J-Hilk wrote, you will overwrite what is at this position, not insert.
If you want to insert something you need to write the old content at the location where you're inserting after the inserted data.