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  4. How to get index[int] of current selected row from ListView in Qt with C++?
Forum Update on Tuesday, May 27th 2025

How to get index[int] of current selected row from ListView in Qt with C++?

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  • T Offline
    T Offline
    time
    wrote on 31 Oct 2016, 12:54 last edited by time
    #1

    I am trying to delete row in my database, through Qt ListView. So in GUI window I have listView with some data. User select one row and after clicking 'delete button', the row is deleting from ListView and database. I have problem with getting the number of the row which the user selected. The program returning me value -1

    void MainWindow::on_pushButtonUsunWydatek_clicked()
    {
    connectionOpen(); // Open connection to the DB
    QSqlQueryModel model;

    int index = ui->listView_Wydatki->currentIndex().row(); //want to get current selected row by the user HERE is the main problem
    
    int id = model.record(index).value("id").toInt(); //here I collect specific ID from Database
    
    //here I check if it get well
    qDebug() << "ID: " << id;
    qDebug() << "Index: " << index;
    
    model.setQuery("DELETE FROM wydatki WHERE id = "id" "); // additional question: how to properly put 'id' variable here?
    
    connectionClose(); //closing connection with DB 
    

    }

    R 1 Reply Last reply 31 Oct 2016, 13:00
    0
    • T time
      31 Oct 2016, 12:54

      I am trying to delete row in my database, through Qt ListView. So in GUI window I have listView with some data. User select one row and after clicking 'delete button', the row is deleting from ListView and database. I have problem with getting the number of the row which the user selected. The program returning me value -1

      void MainWindow::on_pushButtonUsunWydatek_clicked()
      {
      connectionOpen(); // Open connection to the DB
      QSqlQueryModel model;

      int index = ui->listView_Wydatki->currentIndex().row(); //want to get current selected row by the user HERE is the main problem
      
      int id = model.record(index).value("id").toInt(); //here I collect specific ID from Database
      
      //here I check if it get well
      qDebug() << "ID: " << id;
      qDebug() << "Index: " << index;
      
      model.setQuery("DELETE FROM wydatki WHERE id = "id" "); // additional question: how to properly put 'id' variable here?
      
      connectionClose(); //closing connection with DB 
      

      }

      R Offline
      R Offline
      raven-worx
      Moderators
      wrote on 31 Oct 2016, 13:00 last edited by
      #2

      @time said in How to get index[int] of current selected row from ListView in Qt with C++?:

      what does the following output?
      qDebug() << model.record(index).value("id")

      model.setQuery("DELETE FROM wydatki WHERE id = "id" "); // additional question: how to properly put 'id' variable here?

      There are multiple possible solutions. One can be model.setQuery( QString("DELETE FROM wydatki WHERE id = \"") + id + "\"" )

      --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
      If you have a question please use the forum so others can benefit from the solution in the future

      T 1 Reply Last reply 31 Oct 2016, 13:10
      1
      • R raven-worx
        31 Oct 2016, 13:00

        @time said in How to get index[int] of current selected row from ListView in Qt with C++?:

        what does the following output?
        qDebug() << model.record(index).value("id")

        model.setQuery("DELETE FROM wydatki WHERE id = "id" "); // additional question: how to properly put 'id' variable here?

        There are multiple possible solutions. One can be model.setQuery( QString("DELETE FROM wydatki WHERE id = \"") + id + "\"" )

        T Offline
        T Offline
        time
        wrote on 31 Oct 2016, 13:10 last edited by time
        #3

        @raven-worx Thank you. And what with other problems? Especially with getting index of the selected row in ListView?
        I can't get the output qDebug() << model.record(index).value("id") because I don't have properly index. The program returning index -1

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        • V Offline
          V Offline
          VRonin
          wrote on 31 Oct 2016, 13:48 last edited by
          #4

          ui->listView_Wydatki->selectionModel()->selectedIndexes() will return a list of selected indexes. do not use currentIndex() as if you deselect an item current index will be that item

          "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
          ~Napoleon Bonaparte

          On a crusade to banish setIndexWidget() from the holy land of Qt

          1 Reply Last reply
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          2/4

          31 Oct 2016, 13:00

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