wxFileOutputStream

[newbee]

Hi,

Code: Select all

int i;
float f;
wxString str;
wxFile file(wxT("scores.dat"));
wxFileOutputStream out(file);
wxDataOutputStream outdata(out);
out.SeekO(0,wxFromEnd);
outdata<<5<<0.012;
outdata<<wxT("I cant write this text twice");

wxFileInputStream in(wxT("scores.dat"));
wxDataInputStream data(in);
//in.SeekI(0,wxFromStart);
data>>i>>f;
data>>str;

But everytime I run the code I see the same content.How to write at the end of the file?

[doublemax]

Pass " wxFile::write_append" as mode when opening the file:

Code: Select all

wxFile file(wxT("scores.dat"), wxFile::write_append);

http://docs.wxwidgets.org/stable/wx_wxfile.html#wxfile

Also, for stuff like this, take a look at wxTextFile which may be easier to use:
http://docs.wxwidgets.org/stable/wx_wxt ... wxtextfile

[newbee]

Thanks for the reply.I feel comfortable when using wxTextFile, but can we use it for binary data?
Also,Im confused with that we have wxFileInputStream and wxDataInputStream.I create objects for both of them.Seek function of which should I use?