Russian Qt Forum

namespace Ui {
class TableDialog;
}

class TableDialog : public QDialog
{
    Q_OBJECT

public:
    explicit TableDialog(QWidget *parent = 0);
    ~TableDialog();

private:
    Ui::TableDialog *ui;

private slots:
    void addItemTableDialog(const QString &str);
};

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>TableDialog</class>
 <widget class="QDialog" name="TableDialog">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>485</width>
    <height>85</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Dialog</string>
  </property>
  <layout class="QGridLayout" name="gridLayout">
   <item row="0" column="0">
    <layout class="QVBoxLayout" name="verticalLayout">
     <item>
      <widget class="QComboBox" name="comboBox">
       <property name="minimumSize">
        <size>
         <width>50</width>
         <height>25</height>
        </size>
       </property>
       <property name="maximumSize">
        <size>
         <width>16777215</width>
         <height>25</height>
        </size>
       </property>
       <property name="insertPolicy">
        <enum>QComboBox::InsertAtCurrent</enum>
       </property>
      </widget>
     </item>
     <item>
      <widget class="QDialogButtonBox" name="buttonBox">
       <property name="orientation">
        <enum>Qt::Horizontal</enum>
       </property>
       <property name="standardButtons">
        <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
       </property>
      </widget>
     </item>
    </layout>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections>
  <connection>
   <sender>buttonBox</sender>
   <signal>accepted()</signal>
   <receiver>TableDialog</receiver>
   <slot>accept()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>248</x>
     <y>254</y>
    </hint>
    <hint type="destinationlabel">
     <x>157</x>
     <y>274</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>buttonBox</sender>
   <signal>rejected()</signal>
   <receiver>TableDialog</receiver>
   <slot>reject()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>316</x>
     <y>260</y>
    </hint>
    <hint type="destinationlabel">
     <x>286</x>
     <y>274</y>
    </hint>
   </hints>
  </connection>
 </connections>
</ui>

void TableDialog::addItemTableDialog(QString str)
{
    ui->comboBox->addItem(str);
    QFile file("C:/log.txt");
    QTextStream out(&file);
    if (file.open(QIODevice::WriteOnly)) {
        //file.write(str);
        out<<"OK: " <<str;
    }
    file.close();
}