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Writing to file but file is not created?

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  • P Offline
    P Offline
    pditty8811
    wrote on last edited by
    #1

    Here is my code. I'm trying to write to file. I can run my program and it runs fine, with no errors or debug errors, but the file is not created and nothing is written.

    @
    QFile file("output.txt");
    if (!file.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
    qDebug() << "error";
    break;
    }

        QTextStream stream(&file);
        stream << "yes";
        file.close();
    

    @

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    0
    • JKSHJ Offline
      JKSHJ Offline
      JKSH
      Moderators
      wrote on last edited by
      #2

      You might not be looking in the program's working directory. Add this to your code after you create your QFile:

      @
      QFileInfo fileInfo(file);
      qDebug() << fileInfo.absolutePath();
      @

      What is the path shown?

      Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

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      • P Offline
        P Offline
        pditty8811
        wrote on last edited by
        #3

        I looked in the directory path that it showed and nothing. Its my build directory.

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #4

          Hi,

          What error does QFile return ?

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • IamSumitI Offline
            IamSumitI Offline
            IamSumit
            wrote on last edited by
            #5

            Hii pditty8811..
            Why r you using break over here ..it is illegal to use..
            I compiled and run your program it is working fine at my side ..and file is created too.Give a specified path to a file .

            Be Cute

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            • P Offline
              P Offline
              pditty8811
              wrote on last edited by
              #6

              Hi guys thanks for responding. The break is there because all of this is actually in a case statement. I pulled it out of the case and it still doesn't work. If I run file.exists(), the file exists, and it also shows me the absolutepath with FileInfo, but I am unable to find the file on my computer.

              What the hell is going on? I have hidden files shown and OS files unhidden.

              I'm stumped.

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #7

                Again: what error does QFile::error() return if open fails ?

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                • P Offline
                  P Offline
                  pditty8811
                  wrote on last edited by
                  #8

                  QFile::error returns 0

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                  • P Offline
                    P Offline
                    pditty8811
                    wrote on last edited by
                    #9

                    The open does not fail.

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                    • P Offline
                      P Offline
                      pditty8811
                      wrote on last edited by
                      #10

                      1

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                      • JKSHJ Offline
                        JKSHJ Offline
                        JKSH
                        Moderators
                        wrote on last edited by
                        #11

                        From the QFile documentation:[quote]QFile expects the file separator to be '/' regardless of operating system. The use of other separators (e.g., '') is not supported.[/quote]

                        Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

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                        • P Offline
                          P Offline
                          pditty8811
                          wrote on last edited by
                          #12

                          [quote author="JKSH" date="1389414113"]From the QFile documentation:[quote]QFile expects the file separator to be '/' regardless of operating system. The use of other separators (e.g., '') is not supported.[/quote][/quote]

                          Tried it, no luck.

                          I'm using windows xp, and Windows 7. Both builds don't produce the file.

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                          • P Offline
                            P Offline
                            pditty8811
                            wrote on last edited by
                            #13

                            I FINALLY FIGURED IT OUT. It's and antivirus thing. AVAST wasn't letting me create the file. Shit balls. I wasted 2 days on that issue.

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                            • JKSHJ Offline
                              JKSHJ Offline
                              JKSH
                              Moderators
                              wrote on last edited by
                              #14

                              Ouch! I'm glad you've found a solution.

                              Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

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