wxFileInputStream always goes to the end of file (Eof) Topic is solved

[Azrael]

Hello everyone,
I want to read strings from a file but the code I wrote doesn't seem to work. Every time I call the function I get my message "Reached end of file". It never enters the while loop and I don't understand why. The file is not empty. I should be able to get the string out of it, no?

Code: Select all

void load(){
    wxFileInputStream file(wxT("../myFile.txt"));
    if(file.IsOk()){
        wxTextInputStream text(file);
        if(!text.ReadLine().IsSameAs(wxEmptyString)){
           while(!file.Eof()){
                wxString line = text.ReadLine();
                wxMessageBox(wxT("I'm here"));
           }

           if(file.Eof()) {
                    wxMessageBox(wxT("Reached end of file! Loading completed! "));
           }
        }    
     }   
}

[xaviou]

Hi.

The problem is that the wxTextFile loads the entire content of the file into memory, so when you start the loop, the wxFileInputStream has already reached its end.

2 thing you can do :

• You don't have to use the wxFileInputStream : wxTextFile can read a real file itself
• Use the wxTextFile Eof() function as your loop condition

Regards.
Xav'

[Azrael]

2 thing you can do :

• You don't have to use the wxFileInputStream : wxTextFile can read a real file itself
• Use the wxTextFile Eof() function as your loop condition

I used both of them and it works now. Thank you!

Code: Select all

wxTextFile text(wxT("../myFile.txt"));
text.Open();
if (!text.GetFirstLine().IsSameAs(wxEmptyString)) {
    wxArrayString tmp ;
    for (auto str = text.GetFirstLine(); !text.Eof(); str = text.GetNextLine()) {
        tmp.Add(str);       
    }
    if (text.Eof()) {
        wxMessageBox(wxT("Reached end of file! Loading completed! "));
    }
    text.Close();
    addFile(&tmp);
}