Sorry for delay for reply i was on hollyday.

first the frees.txt file have 11 string items on the row seperated with tabs.
see example.
Koolstofstaal 350-850 EC 5 3 Ja Contour frezen 80-100 0.015-0.030 max. 2xD <2.5
Gereedschapstaal 800-1200 EC 8 3 Ja Gleuf frezen 80-100 0.015-0.030 max. 2xD <2.5
These file will be updated with 600 rows.

In my zoekDialog i have 5 comboboxes in each combobox different items.
When i choose items i want to show the items in Mainwindow lineedits.
example:
combobox 1 = Koolstofstaal
combobox 2 = EC
combobox 3 = 5
combobox 4 = 3
combobox 5 = Contour Frezen
The rest of the row in frees.txt must fill up in the other Mainwindow lineedits.

The problem is the iterator on stringlist show only 1 string item.
Normally i want to use in if 5 statements but the pick only 1 the first one
See example.
if ( mat == dlg.matComboBox->currentText() && frees == dlg.freesComboBox->currenText() && etc ... ) every statement must be true.

see MainWindow.cpp
Qt Code: 
  1. void MainWindow::zoek()
  2. {
  3. 	zoekDialog dlg(this); 
  4. 	if( dlg.exec() == QDialog::Accepted ) {   // Open a Dialog with 5 Comboboxen filled with items.
  5.  
  6. 			QString treksterkte, koeling, voedingpertand, snijsnelheid, snedediepte, snedebreedte;
  7. 			QString mat = dlg.matComboBox->currentText(); //Choose a item in the combobox and put in the string mat.
  8. 			QString frees = dlg.freesComboBox->currentText();
  9. 			QString tand = dlg.tandComboBox->currentText();
  10. 			QString dia = dlg.diaComboBox->currentText();
  11. 			QString bewrk = dlg.bewerkComboBox->currentText();
  12.  
  13. 			QFile file("C:/Qt/Qt-prog/richtwaarden/frees.txt");  //Open the file with strings seperated with tabs.
  14. 			if( !file.open(QFile::ReadOnly))		
  15. 			return;
  16.  
  17. 			QTextStream stream( &file);
  18. 			QString line;
  19. 					 do  {
  20.  
  21. 			line = stream.readLine();
  22. 			if(!line.isEmpty())	
  23. 			{
  24. 			QStringList frees = line.split('\t', QString::SkipEmptyParts); // Make a Stringlist
  25. 			QListIterator<QString> i(frees); // Iterate over the Stringlist frees.
  26. 			while (i.hasNext())
  27. 			{
  28.  
  29. 				if ( mat == i.next())						  // It search for that item in the Stringlist en put the item
  30. 					leMateriaal->setText( mat );		      // in the Mainwindow Lineedit.
  31. 				if ( freestype == i.next())
  32. 					leFrees->setText( freestype );				// This don't work
  33. 			}
  34. 			}
  35. 			}while(!line.isEmpty());
  36.  
  37.  
  38. 	file.close();		
  39. }
To copy to clipboard, switch view to plain text mode 

B.T.W. i did this with QtSql and QTSqlQuerry no problem works fine.
see little example of code:
Qt Code: 
  1. void MainWindow::zoek()
  2. {
  3. 	zoekDialog dlg(this); 
  4. 	if( dlg.exec() == QDialog::Accepted ) {
  5.  
  6.         QString materiaal;
  7.  
  8. 		QSqlQuery query("SELECT * FROM frezen WHERE materiaal='" + dlg.matComboBox->currentText() + "'AND freesdiameter='" + dlg.diaComboBox->currentText() + "'AND freestype='" + dlg.freesComboBox->currentText() + "'AND aantaltanden='" + dlg.tandComboBox->currentText() + "'AND  freesbewerking='" + dlg.bewerkComboBox->currentText() + "';");
  9. 		if (query.next())
  10. 		materiaal= query.value(0).toString();
  11. 		leMateriaal->setText(materiaal);							QString treksterkte = query.value(1).toString();
  12.         	leTrek->setText(treksterkte);
  13.     		QString freestype = query.value(2).toString();
  14.         	leFrees->setText(freestype);
  15.        	 	QString freesdiameter = query.value(3).toString();
  16.         	leDiam->setText(freesdiameter);
  17.         	QString aantaltanden = query.value(4).toString();
  18.         	leAantal->setText(aantaltanden);
  19.         	QString koeling = query.value(5).toString();
  20.         	leKoeling->setText(koeling);
  21.         	QString freesbewerking = query.value(6).toString();
  22.         	leFreesb->setText(freesbewerking);
  23.         	QString snijsnelheid = query.value(7).toString();
  24.         	leSnijsnelheid->setText(snijsnelheid);
  25.         	QString voedingpertand = query.value(8).toString();
  26.         	leAanzet->setText(voedingpertand);
  27.         	QString snedediepte = query.value(9).toString();
  28.         	leSneded->setText(snedediepte);
  29.         	QString snedebreedte = query.value(10).toString();
  30.         	leSnedeb->setText(snedebreedte);
To copy to clipboard, switch view to plain text mode 
Maby i must stick with QTSql.

Thaks in advance.