WxTextFile.Write() not performing correctly Topic is solved

[nmartz]

Hi guys,
I am currently working with a textfile and have been attempting to alter specific lines in the textfile. I have been using code like:

myfile.InsertLine(line,myfile.GetCurrentLine());
myfile.RemoveLine(myfile.GetCurrentLine());

to accomplish what changes I want to make, where line is the wxstring I wish to insert and the current line is the line I wish to remove. I call myfile.Write(); right before I call myfile.Close(); , but my textfile remains exactly as it was prior to running the program. I have tested the code with a few statements like:

if(myfile.Write())
{
wxMessageBox("File has been written");
}

and all those tests return true that the file has been written. Any ideas as to what my problem may be? Thanks for taking the time to help!

[doublemax]

Code: Select all

myfile.InsertLine(line,myfile.GetCurrentLine());
myfile.RemoveLine(myfile.GetCurrentLine());

Are you actually using the GetFirstLine()/GetNextLine() functions? Otherwise GetCurrentLine() will not do what you expect.
http://docs.wxwidgets.org/stable/wx_wxt ... urrentline

And if you just want to change one line, you can do it like this:

Code: Select all

myfile[10] = wxT("my new content for line 10");

[nmartz]

Yes, I use GetFirstLine() and GetNextLine() to parse through my file but only use GetCurrentLine() to address the place I wish to insert or delete lines

[nmartz]

I would use this code, but my situation kind of prohibits it. I am parsing through an xml file and then taking relevant data and writing it into a text file. Where it is written in the text file is based on what the xml file says, so I do not know in advance which line I am writing to and can't hardcode it.

myfile[10] = wxT("my new content for line 10");

[jgrzybowski]

I have already checked in wxWidget help, and function InserLine inserts line (your "line") before line number (your "myfile.GetCurrentLine()") and this function does not change current line in file. I guess, probubly you are removing the line which you have inserted one code line above! My suggestions:
1)
myfile.InsertLine(line, myfile.GetCurrentLine());
myfile.RemoveLine(myfile.GetCurrentLine() + 1);
2)
myfile.InsertLine(line, myfile.GetCurrentLine());
myfile.GetNextLine();
myfile.RemoveLine(myfile.GetCurrentLine());

Regards
Jarek

[nmartz]

The problem has been resolved, I opted for:

Code: Select all

myfile[myfile.GetCurrentLine()] = wxT("my new content for line 10");

and that worked. Thanks so much for the help