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[Solved] Problem with QSetting

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  • ? Offline
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    A Former User
    wrote on 23 Apr 2014, 19:32 last edited by
    #1

    Hello everybody;
    I have a problem with QSetting in read mode.

    This is my code for read from ini file:

    @

    QSettings obSettings("file.ini", QSettings::IniFormat);
    obSettings.beginGroup("General");
    QString address = obSettings.value("Serever","").toString();
    obSettings.endGroup();

    qDebug() << "Server address = " << address;
    @

    But result is empty !!!

    Result : Server address = ""

    Someine can help me for solve this problem ??? :)

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      stevenceuppens
      wrote on 23 Apr 2014, 19:57 last edited by
      #2

      Hello,

      1. is your file.ini empty?

      2. the method
        obSettings.value( key, defaultValue ).toString();

      if the key doesn't exists it returns your provided default, in this case an empty string.. (maybe a type in your group or key name?)

      Steven CEUPPENS
      Developer &#x2F; Architect
      Mobile: +32 479 65 93 10

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        mranger90
        wrote on 23 Apr 2014, 20:00 last edited by
        #3

        Did you misspell "server" ?

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          SGaist
          Lifetime Qt Champion
          wrote on 23 Apr 2014, 20:04 last edited by
          #4

          Hi,

          Except the possible typo with Serever, did you save it first once ?

          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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            A Former User
            wrote on 23 Apr 2014, 20:20 last edited by
            #5

            this is my ini file content :

            [General]
            Server=192.168.1.1

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              stevenceuppens
              wrote on 23 Apr 2014, 20:23 last edited by
              #6

              did you check the typo in

              QString address = obSettings.value(" Serever ","").toString();

              Steven CEUPPENS
              Developer &#x2F; Architect
              Mobile: +32 479 65 93 10

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                A Former User
                wrote on 23 Apr 2014, 20:25 last edited by
                #7

                Yes I have a mistake in mytype server ... serever no server.

                but does not work again :(

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                  A Former User
                  wrote on 23 Apr 2014, 20:28 last edited by
                  #8

                  This is my code see again please :

                  @
                  QSettings obSettings("database.ini", QSettings::IniFormat);
                  obSettings.beginGroup("General");
                  QString server = obSettings.value("Server", "").toString();
                  obSettings.endGroup();

                  qDebug() << "Server = " << server;
                  @

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                    SGaist
                    Lifetime Qt Champion
                    wrote on 23 Apr 2014, 21:19 last edited by
                    #9

                    Where is database.ini located ?

                    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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                      A Former User
                      wrote on 23 Apr 2014, 21:24 last edited by
                      #10

                      [quote author="SGaist" date="1398287969"]Where is database.ini located ?[/quote]

                      No specific path !

                      I can write into this ini file with below code :

                      QSettings settings("database.ini", QSettings::IniFormat);
                      settings.setValue("Server", "192.168.1.1");

                      but for read.... I don't know why doesn't work.

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                        SGaist
                        Lifetime Qt Champion
                        wrote on 23 Apr 2014, 21:26 last edited by
                        #11

                        Just a wild idea:

                        try with foo in place of General for the group name

                        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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                          A Former User
                          wrote on 23 Apr 2014, 21:36 last edited by
                          #12

                          [quote author="SGaist" date="1398288372"]Just a wild idea:

                          try with foo in place of General for the group name [/quote]

                          Can you show me with example ? :)

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                            SGaist
                            Lifetime Qt Champion
                            wrote on 23 Apr 2014, 21:41 last edited by
                            #13

                            Before that, just saw something:

                            @
                            QSettings settings(“database.ini”, QSettings::IniFormat); settings.setValue(“Server”, “192.168.1.1”);
                            @

                            You don't begin the group, is that a missing line ?

                            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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                              A Former User
                              wrote on 23 Apr 2014, 21:58 last edited by
                              #14

                              [quote author="SGaist" date="1398289288"]Before that, just saw something:

                              @
                              QSettings settings(“database.ini”, QSettings::IniFormat); settings.setValue(“Server”, “192.168.1.1”);
                              @

                              You don't begin the group, is that a missing line ?[/quote]

                              but this is not for Read from ini file ! I don't have problem with setValue :)
                              My main problem is reading from file :(

                              You just show me how can I read from ini file , maybe I have a little mistake.
                              Of course my ini file content is :

                              [General]
                              Server=192.168.1.1

                              Why I can't read 192.168.1.1 from server!?

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                                SGaist
                                Lifetime Qt Champion
                                wrote on 23 Apr 2014, 22:04 last edited by
                                #15

                                The thing is: your writing to the init file and your reading must match.
                                Using :

                                @
                                QSettings settings(“database.ini”, QSettings::IniFormat); settings.setValue(“Server”, “192.168.1.1”);
                                @

                                to write, then you must use

                                @
                                QSettings settings(“database.ini”, QSettings::IniFormat);
                                QString server = settings.value(“Server”, “”).toString();
                                @

                                to read it back

                                [edit: corrected my code]

                                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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                                  A Former User
                                  wrote on 23 Apr 2014, 22:13 last edited by
                                  #16

                                  No ! error... in QString server = settings.value(“Server”, “”);

                                  I changed it to below format with QVariant

                                  @
                                  QSettings settings("database.ini", QSettings::IniFormat);
                                  QVariant server = settings.value("Server", "");

                                  qDebug() << "Server = " << server.toString();
                                  @

                                  Result is :

                                  Server = "192.168.1.1"

                                  Good work :)
                                  Thank you very much. ;)

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                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on 24 Apr 2014, 07:38 last edited by
                                    #17

                                    You're welcome !

                                    Since you have your settings working now, please update the thread title prepending [solved] so other forum users may know a solution has been found :)

                                    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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                                      A Former User
                                      wrote on 24 Apr 2014, 07:50 last edited by
                                      #18

                                      Yes of course !
                                      title is changed :)

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