Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. Selecting data from mysql using qt?
Forum Updated to NodeBB v4.3 + New Features

Selecting data from mysql using qt?

Scheduled Pinned Locked Moved General and Desktop
150 Posts 7 Posters 162.1k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • D Offline
    D Offline
    Dmytro
    wrote on 11 Oct 2010, 17:39 last edited by
    #13

    Try uncomment line 23

    1 Reply Last reply
    0
    • D Offline
      D Offline
      doforumda
      wrote on 11 Oct 2010, 17:42 last edited by
      #14

      i uncomment line 23 and comment everything below line 23 then it just says
      @
      Starting /home/zafar/c++/dbExample-build-desktop/dbExample...
      @

      and stucks there

      1 Reply Last reply
      0
      • D Offline
        D Offline
        Dmytro
        wrote on 11 Oct 2010, 17:55 last edited by
        #15

        OH! You use SQL code before
        a.exec()
        !
        Are you sure?

        Create standart QT GUI application and wrote sql code in mainwindow module.

        1 Reply Last reply
        0
        • D Offline
          D Offline
          doforumda
          wrote on 11 Oct 2010, 18:01 last edited by
          #16

          i am new to qt. how can i create Qt Gui App and do you mean i should write sql code in mainwindow.h file?

          1 Reply Last reply
          0
          • D Offline
            D Offline
            doforumda
            wrote on 11 Oct 2010, 18:05 last edited by
            #17

            right now i have three files. db.h, db,cpp and main.cpp

            1 Reply Last reply
            0
            • D Offline
              D Offline
              Dmytro
              wrote on 11 Oct 2010, 18:12 last edited by
              #18

              Run QT Creator.
              Use menu File/new file or project.
              Select QT Gui application.
              ...
              and select SQL checkbox
              ...
              and write sql code in MainWindow.cpp
              ...
              and see SQL Example please

              1 Reply Last reply
              0
              • D Offline
                D Offline
                doforumda
                wrote on 11 Oct 2010, 18:16 last edited by
                #19

                well i tried "File/new file or project and select qt gui app" but i ddint find any sql checkbox anywhere in creating new project

                1 Reply Last reply
                0
                • D Offline
                  D Offline
                  Dmytro
                  wrote on 11 Oct 2010, 18:32 last edited by
                  #20

                  no coments...
                  How can I send you screenshot?

                  1 Reply Last reply
                  0
                  • D Offline
                    D Offline
                    doforumda
                    wrote on 11 Oct 2010, 18:34 last edited by
                    #21

                    you can add pictures here as screenshots or if you want my email address i ll give you that as well for screenshots

                    1 Reply Last reply
                    0
                    • D Offline
                      D Offline
                      doforumda
                      wrote on 11 Oct 2010, 19:14 last edited by
                      #22

                      anyone who can help?

                      1 Reply Last reply
                      0
                      • D Offline
                        D Offline
                        Dmytro
                        wrote on 11 Oct 2010, 19:30 last edited by
                        #23

                        !http://hin.dp.ua/files/down/qt_scr.PNG(my screenshot)!

                        1 Reply Last reply
                        0
                        • D Offline
                          D Offline
                          doforumda
                          wrote on 11 Oct 2010, 19:56 last edited by
                          #24

                          well i dont have that option. here is what i get
                          when i click file/new file or project then this screenshot
                          "Your text to link here...":http://www.freeimagehosting.net/uploads/702f633ae7.png
                          then i keep clicking next getting the follwoing screenshots
                          "Your text to link here...":http://www.freeimagehosting.net/uploads/ab872acfb8.png
                          "Your text to link here...":http://www.freeimagehosting.net/uploads/45c51ab364.png
                          "Your text to link here...":http://www.freeimagehosting.net/uploads/84605eae46.png
                          "Your text to link here...":http://www.freeimagehosting.net/uploads/84605eae46.png

                          1 Reply Last reply
                          0
                          • D Offline
                            D Offline
                            Dii
                            wrote on 11 Oct 2010, 21:47 last edited by
                            #25

                            Well, it should make no problem to have SQL query before exec(), at least I don't have any problem with that.

                            Let's get back to square one:
                            You said if you uncomment the
                            @bool ok = db.open();@
                            then your program hangs. Can we see the value of 'ok'?
                            @qDebug() << ok;@
                            My guess is probably you have problems granting the rights in mysql when you've created the table... have you made
                            @GRANT ALL ON testTwo.* to 'root'at'localhost' IDENTIFIED BY 'somepassword';@
                            (Ouch please replace the 'at' with the 'at' sign, the forum motor uses it for code tags, I don't know how to write it... I hope it's not confusing.
                            I'm not sure if you can do it with empty password, I guess yes, but I never do that.)

                            1 Reply Last reply
                            0
                            • D Offline
                              D Offline
                              doforumda
                              wrote on 12 Oct 2010, 05:49 last edited by
                              #26

                              i now put password for root at localhost.
                              when i place qDebug() << ok then it displays this
                              @
                              false
                              QSqlQuery::exec: database not open
                              @

                              false might be the value of ok.

                              1 Reply Last reply
                              0
                              • L Offline
                                L Offline
                                lyuts
                                wrote on 12 Oct 2010, 08:16 last edited by
                                #27

                                Are you able to connect to your DB from shell?

                                I'm a rebel in the S.D.G.

                                1 Reply Last reply
                                0
                                • D Offline
                                  D Offline
                                  doforumda
                                  wrote on 12 Oct 2010, 08:21 last edited by
                                  #28

                                  i dont know how to connect to my DB from shell. I install xampp which is easy for me to manage my databases.
                                  how can i connect from shell?

                                  1 Reply Last reply
                                  0
                                  • L Offline
                                    L Offline
                                    lyuts
                                    wrote on 12 Oct 2010, 08:25 last edited by
                                    #29

                                    @mysql -h host -D dbname -u user@

                                    I guess your can omit host parameter if you are connecting to localhost. You might need to specify "-p password" switch also (depends on mysql configuration).

                                    I'm a rebel in the S.D.G.

                                    1 Reply Last reply
                                    0
                                    • D Offline
                                      D Offline
                                      doforumda
                                      wrote on 12 Oct 2010, 08:30 last edited by
                                      #30

                                      i think i did not install any mysql client. bcause it displays this output
                                      @
                                      root@zafar-laptop:/# mysql -h localhost -D testTwo -u root -p xxxxxx
                                      The program 'mysql' can be found in the following packages:

                                      • mysql-client-core-5.1
                                      • mysql-client-5.0
                                      • mysql-cluster-client-5.1
                                        Try: apt-get install <selected package>
                                        @
                                      1 Reply Last reply
                                      0
                                      • L Offline
                                        L Offline
                                        lyuts
                                        wrote on 12 Oct 2010, 08:31 last edited by
                                        #31

                                        Run
                                        @dpkg --list | grep mysql@
                                        and post the output for this command.

                                        I'm a rebel in the S.D.G.

                                        1 Reply Last reply
                                        0
                                        • D Offline
                                          D Offline
                                          doforumda
                                          wrote on 12 Oct 2010, 08:35 last edited by
                                          #32

                                          here it is
                                          @
                                          root@zafar-laptop:/# dpkg --list | grep mysql
                                          ii libmysqlclient-dev 5.1.41-3ubuntu12.6 MySQL database development files
                                          ii libmysqlclient16 5.1.41-3ubuntu12.6 MySQL database client library
                                          ii mysql-common 5.1.41-3ubuntu12.6 MySQL database common files (e.g. /etc/mysql

                                          @

                                          1 Reply Last reply
                                          0

                                          22/150

                                          11 Oct 2010, 19:14

                                          128 unread
                                          • Login

                                          • Login or register to search.
                                          22 out of 150
                                          • First post
                                            22/150
                                            Last post
                                          0
                                          • Categories
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups
                                          • Search
                                          • Get Qt Extensions
                                          • Unsolved