Combo box strings

I am trying to get some combo boxes to have their entries populated by a text file. I've read many forum entries about the 'strings[]' property, it but it refuses to work for me. I want the combo box to be modifiable by changing entries in a text file.
Can someone beat this code into submission? I get this error about a GPIB controller needing to be in charge.
I've included the vi, the text file I want to populate the 'Version Number' combo box and that should be it.
Tay
Solved!
Go to Solution.
Attachments:
Event Inspection.zip ‏662 KB
test.txt ‏1 KB

On a sidenote, you have some serious coding mistakes. For example look at the following code.
I would think that the "select" node should act according to the current value of the boolean. WIth your current code, it is very likely that you read the stale value from the property node before the Pass/Fail indicator has received the new value. This is a classic race condition.
Don't be afraid to branch a wire! The property node is entirely useless and actually is computationally expensive. All you need is a wire. Right? The wire creates a data dependency that ensures correct execution order.
(See also http://forums.ni.com/ni/board/message?board.id=BreakPoint&view=by_date_ascending&message.id=5178#M51...)
Message Edited by altenbach on 04-20-2008 01:05 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
RaceConditionAnnotated.png ‏11 KB

Similar Messages

COMBO BOX STRING

Hi all,
The string displayed in the combo box is in the left side, is there a method to move it to centre.
without giving spaces before the string in the edit items.
The image is attached below
Solved!
Go to Solution.
Attachments:
combo box.JPG ‏5 KB

Hello Shrekt,
set the focus to your combo box (mouse click on it) and then change its text properties.
Attachments:
Temp.png ‏16 KB

Need help @ listening combo box

Hi Everyone,
below is my code. Please find my question between '?'ed lines.
// CREATE COMBO BOX
if(obj.equals(CSV_COMBO_BOX))
     _combobox[_combobox_count] = new JComboBox();
     //get possible value for combo box
     String [] possible_values = get_possible_values(val[i]);
     for(int i=0; i < possible_values.length; ++i)
     _combobox[_combobox_count].addItem(possible_values[i]);
     //set the default value to usr_val[i]
     _combobox[_combobox_count].setSelectedItem(usr_val[i]);
     // add to panel
     panel.add("tab",_combobox[_combobox_count]);
     // listner
     _combobox[_combobox_count].addItemListener(new ItemListener(){
          public void itemStateChanged(ItemEvent e)
// ? I WANT TO UPDATE usr_val[i] here ?
// ? how could i get the value of "i" or
// combobox_counter in this block?????????
// ???????????????????????????????<?????
     comboboxcount++;
Thanks & Regards
Vikas Talwar

Hi Everyone,
below is my code. Please find my question between '?'ed lines.
// CREATE COMBO BOX
if(obj.equals(CSV_COMBO_BOX))
     _combobox[_combobox_count] = new JComboBox();
     //get possible value for combo box
     String [] possible_values = get_possible_values(val);
     for(int i=0; i < possible_values.length; ++i)
     _combobox[_combobox_count].addItem(possible_values);
     //set the default value to usr_val
     _combobox[_combobox_count].setSelectedItem(usr_val);
     // add to panel
     panel.add("tab",_combobox[_combobox_count]);
     // listner
     _combobox[_combobox_count].addItemListener(new ItemListener(){
            public void itemStateChanged(ItemEvent e)
          // ? I WANT TO UPDATE usr_val here ?
          // ? how could i get the value of "i" or
          // _combo_box_counter in this block?????????
          // ???????????????????????????????<?????
_combobox_count++;
}I have two arrays: one called "val" which is an array of string arrays that you use to populate a JComboBox, and the other one is called "usr_val" that holds strings and is used to set the JComboBox default values. You want to change the default value when the selected item in the corresponding JComboBox has changed. To manage your arrays and JComboBoxes, you have
one counter "i" which seems to count the arrays of string arrays and the array with the default strings and one counter "_combobox_count" which counts the JComboBoxes that have been genererated with the help of these arrays. Obviously, the arrays could be used to generate a different JComponent as well, in which case "i" and "_combobox_count" will have different values. Both "i" and "_combobox_count" are clearly available within the if-block, so you don�t need any extra tricks to access them. What happens if you directly access "i" or "_combobox_count" from within the "itemStateChanged"-method?
Thanks & Regards
Vikas Talwar

Enum au format Combo Box

Bonjour à tous,
J'utilise Labview 7.1.
Dans mon VI, je câble un enum sur une structure condition, jusque là pas de soucis. Je peux ajouter à la structure autant de condition que d'enum définis.
Par contre le fonctionnement séquentiel de l'enum ne me plait pas. Je voudrais qu'il ait le comportement d'une combo box, clairement affiché comme une combo box (flêche qui permet de déployer le menu déroulant, puis sélection de la valeur voulue). Je sais qu'on peut déjà le faire avec l'enum de base, mais sur une IHM on ne le voit pas directement.
J'ai essayé de câbler une combo box (string) sur uns structure condition mais ça ne fonctionne pas, je n'ai que les conditions "true" et "false".
Y a t'il une fonction Enum, mais avec le comportement exact au niveau IHM d'une combo box ?
Rémy

Hello,
Une liste déroulante peut contenir n'importe quelle chaine de caractère, c'est pour cela que la structure condition ne s'auto-complète pas. Par contre, il n'y a pas de problème en terme de fonctionnement : il suffit de remplacer "true" et "false" par les valeurs attendues de la liste déroulante. Pour les autres valeurs, il faudra avoir un cas "Défaut".
De façon intermédiaire, les menu déroulants (à coté des énum) sont des entiers potentiellement non séquencés auxquels on donne une représentation graphique sous forme de chaine. Inconvénient : on ne voit pas la chaine lorsqu'on cable un menu déroulant à une structure condition, on voit la valeur numérique.
Cdt,
--Eric
Eric M. - Application Engineering Specialist
Certified LabVIEW Architect
Certified LabWindows™/CVI Developer

Long strings in combo box

I have an editable combo box that I'm sticking in a compact spring layout. The problem is if you use a list that contains very long strings (like a long hex string), the combo box sizes itself to fit it and all the other controls are made to be that length as well. Is there a way to stop the control from becoming so long, like a horizontal scroll bar in the list?

Read this [url http://www.objects.com.au/java/examples/src/examples/SteppedComboBoxExample.java]example
Here's its [url http://www.objects.com.au/java/examples/swing/SteppedComboBox.do]picture
ICE

Cosmetic Glitch when Replacing a Silver Style Combo Box by a String

As the title says, if you replace a Silver Style Combo Box by a String (same data type), things turn ugly:
Nothing of the sort happens with the other styles as can be seen above too.

Hi X
Yea I get the same behavior in 2012 and 2013. A workaround for this would be to replace the original control or indicator with a non-silver version of the control and then replace that control with the desired silver style control. This seems to work for me.
Paolo F.
National Instruments
Applications Engineer

Unchecking "Allow Undefined Strings" for System Combo Box Doesn't Work

Why will my system combo box still allow undefined strings even after unchecking "Allow Undefined Strings"?
The combo box works nicely because it allows the user to start typing in the string they want and the combo box will finish it off for them, but if you hit delete or change a letter turning it into an undefined string, the combo box will accept it.
Edit: I'm using LV 8.5
Message Edited by Sima on 01-14-2009 07:03 PM
Message Edited by Sima on 01-14-2009 07:04 PM
Attachments:
systemcombobox.vi ‏8 KB

I don't see the issue with Delete, but Backspace causes what I think you're seeing. If I type "a" into your example combo box, it autocompletes the "re" in the word "are". If I hit delete, nothing happens. If I type other characters, nothing happens. But, if I hit backspace, then the "re" disappears, leaving just "a". If I click outside the combo box, the a is left, and a string indicator picks this up. Thus, the combo box has allowed an undefined string.
Ouch. A little help from NI, please?
Maybe this is what "festo" was seeing here:
http://forums.ni.com/ni/board/message?board.id=170&requireLogin=False&thread.id=114297
(no offense intended I figured you were just slowing your code down... but thought it was an opportunity to stop others from starting bad habits with Next Multiple.)
Certified LabVIEW Architect
Wait for Flag / Set Flag
Separate Views from Implementation for Strict Type Defs

Combo Box, Converting string to int

The user is able to select the month, year etc for a TimerTask using a combo box.
The problem I have is converting say, "January" to an integer 0 for use to set in a calendar for the date.
The combo box is populated with every month but i cannot link it with the int variable "month" where 0= january, 1- feb etc for use in the TimerTask.
In other words, when the user selects "January" in the combo box i want the integer value for the variable "month" to equal 0, for "Febuary", month to equal 1, "March", month equal 2 etc etc.
Any help would be excellent!!

if January is the first item in the box, February is the second, all the way to December:
month = monthComboBox().getSelectedIndex();

How to populate data in the data table on combo box change event

hi
i am deepak .
i am very new to JSF.
my problem is i want to populate data in the datatable on the combo box change event.
for example ---
combo box has name of the city. when i will select a city
the details of the city should populate in the datatable. and if i will select another city then the datatable should change accordingly..
its urgent
reply as soon as possible
thanks in advance

i am using Rational Application Developer to develop my application.
i am using a combo box and i am assigning cityName from the SDO.
and i am declaring a variable in the pageCode eg.
private String cityName;
public void setCityName(String cityName){
this.cityName = cityName;
public String getCityName(){
return cityName;
<h:selectOneMenu id="menu1" styleClass="selectOneMenu" value="#{pc_Test1.loginID}" valueChangeListener="#{pc_Test1.handleMenu1ValueChange}">
                    <f:selectItems
                         value="#{selectitems.pc_Test1.usercombo.LOGINID.LOGINID.toArray}" />
               </h:selectOneMenu>
               <hx:behavior event="onchange" target="menu1" behaviorAction="get"
                    targetAction="box1"></hx:behavior>
and also i am declaring a requestParam type variable named city;
and at the onChangeEvent i am writing the code
public void handleMenu1ValueChange(ValueChangeEvent valueChangedEvent) {
FacesContext context = FacesContext.getCurrentInstance();
Map requestScope = ext.getApplication().createValueBinding("#{requestScope}").getValue(context);
requestScope.put("login",(String)valueChangedEvent.getNewValue());
and also i am creating another SDO which is used to populate data in datatable and in this SDO in the where clause i am using that requestParam .
it is assigning value in the pageCode variable and in the requestParam but it is not populating the dataTable. i don't no why??
it is possible that i may not clear at this point.
please send me the way how my problem can be solved.
thanks in advance

How to Bind a Combo Box so that it retrieves and display content corresponding to the Id in a link table and populates itself with the data in the main table?

I am developing a desktop application in Wpf using MVVM and Entity Frameworks. I have the following tables:
1. Party (PartyId, Name)
2. Case (CaseId, CaseNo)
3. Petitioner (CaseId, PartyId) ............. Link Table
I am completely new to .Net and to begin with I download Microsoft's sample application and
following the pattern I have been successful in creating several tabs. The problem started only when I wanted to implement many-to-many relationship. The sample application has not covered the scenario where there can be a any-to-many relationship. However
with the help of MSDN forum I came to know about a link table and managed to solve entity framework issues pertaining to many-to-many relationship. Here is the screenshot of my application to show you what I have achieved so far.
And now the problem I want the forum to address is how to bind a combo box so that it retrieves Party.Name for the corresponding PartyId in the Link Table and also I want to populate it with Party.Name so that
users can choose one from the dropdown list to add or edit the petitioner.

Hello Barry,
Thanks a lot for responding to my query. As I am completely new to .Net and following the pattern of Microsoft's Employee Tracker sample it seems difficult to clearly understand the concept and implement it in a scenario which is different than what is in
the sample available at the link you supplied.
To get the idea of the thing here is my code behind of a view vBoxPetitioner:
<UserControl x:Class="CCIS.View.Case.vBoxPetitioner"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:v="clr-namespace:CCIS.View.Case"
xmlns:vm="clr-namespace:CCIS.ViewModel.Case"
mc:Ignorable="d"
d:DesignWidth="300"
d:DesignHeight="200">
<UserControl.Resources>
<DataTemplate DataType="{x:Type vm:vmPetitioner}">
<v:vPetitioner Margin="0,2,0,0" />
</DataTemplate>
</UserControl.Resources>
<Grid>
<HeaderedContentControl>
<HeaderedContentControl.Header>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<TextBlock Margin="2">
<Hyperlink Command="{Binding Path=AddPetitionerCommand}">Add Petitioner</Hyperlink>
| <Hyperlink Command="{Binding Path=DeletePetitionerCommand}">Delete</Hyperlink>
</TextBlock>
</StackPanel>
</HeaderedContentControl.Header>
<ListBox BorderThickness="0" SelectedItem="{Binding Path=CurrentPetitioner, Mode=TwoWay}" ItemsSource="{Binding Path=tblParties}" />
</HeaderedContentControl>
</Grid>
</UserControl>
This part is working fine as it loads another view that is vPetioner perfectly in the manner I want it to be.
Here is the code of vmPetitioner, a ViewModel:
Imports Microsoft.VisualBasic
Imports System.Collections.ObjectModel
Imports System
Imports CCIS.Model.Party
Namespace CCIS.ViewModel.Case
''' <summary>
''' ViewModel of an individual Email
''' </summary>
Public Class vmPetitioner
Inherits vmParty
''' <summary>
''' The Email object backing this ViewModel
''' </summary>
Private petitioner As tblParty
''' <summary>
''' Initializes a new instance of the EmailViewModel class.
''' </summary>
''' <param name="detail">The underlying Email this ViewModel is to be based on</param>
Public Sub New(ByVal detail As tblParty)
If detail Is Nothing Then
Throw New ArgumentNullException("detail")
End If
Me.petitioner = detail
End Sub
''' <summary>
''' Gets the underlying Email this ViewModel is based on
''' </summary>
Public Overrides ReadOnly Property Model() As tblParty
Get
Return Me.petitioner
End Get
End Property
''' <summary>
''' Gets or sets the actual email address
''' </summary>
Public Property fldPartyId() As String
Get
Return Me.petitioner.fldPartyId
End Get
Set(ByVal value As String)
Me.petitioner.fldPartyId = value
Me.OnPropertyChanged("fldPartyId")
End Set
End Property
End Class
End Namespace
And below is the ViewMode vmParty which vmPetitioner Inherits:
Imports Microsoft.VisualBasic
Imports System
Imports System.Collections.Generic
Imports CCIS.Model.Case
Imports CCIS.Model.Party
Imports CCIS.ViewModel.Helpers
Namespace CCIS.ViewModel.Case
''' <summary>
''' Common functionality for ViewModels of an individual ContactDetail
''' </summary>
Public MustInherit Class vmParty
Inherits ViewModelBase
''' <summary>
''' Gets the underlying ContactDetail this ViewModel is based on
''' </summary>
Public MustOverride ReadOnly Property Model() As tblParty
'''' <summary>
'''' Gets the underlying ContactDetail this ViewModel is based on
'''' </summary>
'Public MustOverride ReadOnly Property Model() As tblAdvocate
''' <summary>
''' Gets or sets the name of this department
''' </summary>
Public Property fldName() As String
Get
Return Me.Model.fldName
End Get
Set(ByVal value As String)
Me.Model.fldName = value
Me.OnPropertyChanged("fldName")
End Set
End Property
''' <summary>
''' Constructs a view model to represent the supplied ContactDetail
''' </summary>
''' <param name="detail">The detail to build a ViewModel for</param>
''' <returns>The constructed ViewModel, null if one can't be built</returns>
Public Shared Function BuildViewModel(ByVal detail As tblParty) As vmParty
If detail Is Nothing Then
Throw New ArgumentNullException("detail")
End If
Dim e As tblParty = TryCast(detail, tblParty)
If e IsNot Nothing Then
Return New vmPetitioner(e)
End If
Return Nothing
End Function
End Class
End Namespace
And final the code behind of the view vPetitioner:
<UserControl x:Class="CCIS.View.Case.vPetitioner"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:vm="clr-namespace:CCIS.ViewModel.Case"
mc:Ignorable="d"
Width="300">
<UserControl.Resources>
<ResourceDictionary Source=".\CompactFormStyles.xaml" />
</UserControl.Resources>
<Grid>
<Border Style="{StaticResource DetailBorder}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="Petitioner:" />
<ComboBox Grid.Column="1" Width="240" SelectedValuePath="." SelectedItem="{Binding Path=tblParty}" ItemsSource="{Binding Path=PetitionerLookup}" DisplayMemberPath="fldName" />
</Grid>
</Border>
</Grid>
</UserControl>
The problem, presumably, seems to be is that the binding path "PetitionerLookup" of the ItemSource of the Combo box in the view vPetitioner exists in a different ViewModel vmCase which serves as an ObservableCollection for MainViewModel. Therefore,
what I need to Know is how to route the binding path if it exists in a different ViewModel?
Sir, I look forward to your early reply bringing a workable solution to the problem I face.
Warm Regards,
Arun

Adding an event listener to combo box

I am working on a mortgage calculator and I cannot figure out how to add an event listener to a combo box.
I want to get the mortgage term and interest rate to calucate the mortgage using the combo cox. Here is my program.
Modify the mortgage program to allow the user to input the amount of a mortgage
and then select from a menu of mortgage loans: 7 year at 5.35%, 15 year at 5.50%, and
30 year at 5.75%. Use an array for the different loans. Display the mortgage payment
amount. Then, list the loan balance and interest paid for each payment over the term
of the loan. Allow the user to loop back and enter a new amount and make a new
selection, with resulting new values. Allow user to exit if running as an application
(can't do that for an applet though).
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.text.NumberFormat;
import java.util.Locale;
//creates class MortgageCalculator
public class MortgageCalculator extends JFrame implements ActionListener {
//creates title for calculator
     JPanel row = new JPanel();
     JLabel mortgageCalculator = new JLabel("MORTGAGE CALCULATOR", JLabel.CENTER);
//creates labels and text fields for amount entered
     JPanel firstRow = new JPanel(new GridLayout(3,1,1,1));
     JLabel mortgageLabel = new JLabel("Mortgage Payment $", JLabel.LEFT);
     JTextField mortgageAmount = new JTextField(10);
     JPanel secondRow = new JPanel();
     JLabel termLabel = new JLabel("Mortgage Term/Interest Rate", JLabel.LEFT);
     String[] term = {"7", "15", "30"};
     JComboBox mortgageTerm = new JComboBox(term);
     JPanel thirdRow = new JPanel();
     JLabel interestLabel = new JLabel("Interest Rate (%)", JLabel.LEFT);
     String[] interest = {"5.35", "5.50", "5.75"};
     JComboBox interestRate = new JComboBox(interest);
     JPanel fourthRow = new JPanel(new GridLayout(3, 2, 10, 10));
     JLabel paymentLabel = new JLabel("Monthly Payment $", JLabel.LEFT);
     JTextField monthlyPayment = new JTextField(10);
//create buttons to calculate payment and clear fields
     JPanel fifthRow = new JPanel(new GridLayout(3, 2, 1, 1));
     JButton calculateButton = new JButton("CALCULATE PAYMENT");
     JButton clearButton = new JButton("CLEAR");
     JButton exitButton = new JButton("EXIT");
//Display area
     JPanel sixthRow = new JPanel(new GridLayout(2, 2, 10, 10));
     JLabel displayArea = new JLabel(" ", JLabel.LEFT);
     JTextArea textarea = new JTextArea(" ", 8, 50);
public MortgageCalculator() {
     super("Mortgage Calculator");                     //title of frame
     setSize(550, 350);                                             //size of frame
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     Container pane = getContentPane();
     GridLayout grid = new GridLayout(7, 3, 10, 10);
     pane.setLayout(grid);
     pane.add(row);
     pane.add(mortgageCalculator);
     pane.add(firstRow);
     pane.add(mortgageLabel);
     pane.add(mortgageAmount);
     pane.add(secondRow);
     pane.add(termLabel);
     pane.add(mortgageTerm);
     pane.add(thirdRow);
     pane.add(interestLabel);
     pane.add(interestRate);
     pane.add(fourthRow);
     pane.add(paymentLabel);
     pane.add(monthlyPayment);
     monthlyPayment.setEnabled(false);
     pane.add(fifthRow);
     pane.add(calculateButton);
     pane.add(clearButton);
     pane.add(exitButton);
     pane.add(sixthRow);
     pane.add(textarea); //adds texaarea to frame
     pane.add(displayArea);
     setContentPane(pane);
     setVisible(true);
     //Adds Listener to buttons
     calculateButton.addActionListener(this);
     clearButton.addActionListener(this);
     exitButton.addActionListener(this);
     mortgageTerm.addActionListener(this);
     interestRate.addActionListener(this);
public void actionPerformed(ActionEvent event) {
     Object command = event.getSource();
     JComboBox mortgageTerm = (JComboBox)event.getSource();
     String termYear = (String)mortgageTerm.getSelectedItem();
if (command == calculateButton) //calculates mortgage payment
     int year = Integer.parseInt(mortgageTerm.getText());
     double rate = new Double(interestRate.getText()).doubleValue();
     double mortgage = new Double(mortgageAmount.getText()).doubleValue();
     double interest = rate /100.0 / 12.0;
     double monthly = mortgage *(interest/(1-Math.pow(interest+1,-12.0 * year)));
               NumberFormat myCurrencyFormatter;
               myCurrencyFormatter = NumberFormat.getCurrencyInstance(Locale.US);
               monthlyPayment.setText(myCurrencyFormatter.format(monthly));
     if(command == clearButton) //clears all text fields
               mortgageAmount.setText(null);
               //mortgageTerm.setText(null);
               //interestRate.setText(null);
               monthlyPayment.setText(null);
          if(command == exitButton) //sets exit button
                    System.exit(0);
     public static void main(String[] arguments) {
          MortgageCalculator mor = new MortgageCalculator();

The OP already did this to both JComboBoxes.
mochatay, here is a new actionPerformed method for you to use.
I've improved a few things here and there...
1) You can't just cast the ActionEvent's source into a JComboBox!
What if it was a JButton that fired the event? Then you would get ClassCastExceptions (I'm sure you did)
So check for all options, what the source of the ActionEvent actually was...
2) You can't assume the user will always type in valid data.
So enclose the Integer and Double parse methods in try-catch brakcets.
Then you can do something when you know that the user has entered invalid input
(like tell him/her what a clumsy idiot they are !)
3) As soon as user presses an item in any JComboBox, just re-calculate.
I did this here by programmatically clicking the 'Calculate' button.
Alternatively, you could have a 'calculate' method, which does everything inside the
if(command==calculateButton) if-block.
This will be called when:
a)calculateButton is pressed
b)when either of the JComboBoxes are pressed.
public void actionPerformed (ActionEvent event)
        Object command = event.getSource ();
        if (command == calculateButton) //calculates mortgage payment
            int year = 0;
            double rate = 0;
            double mortgage = 0;
            double interest = 0;
            /* If user has input invalid data, tell him so
            and return (Exit from this method back to where we were before */
            try
                year = Integer.parseInt (mortgageTerm.getSelectedItem ().toString ());
                rate = new Double (interestRate.getSelectedItem ().toString ()).doubleValue ();
                mortgage = new Double (mortgageAmount.getText ()).doubleValue ();
                interest = rate / 100.0 / 12.0;
            catch (NumberFormatException nfe)
                /* Display a message Dialogue box with a message */
                JOptionPane.showMessageDialog (this, "Error! Invalid input!");
                return;
            double monthly = mortgage * (interest / (1 - Math.pow (interest + 1, -12.0 * year)));
            NumberFormat myCurrencyFormatter;
            myCurrencyFormatter = NumberFormat.getCurrencyInstance (Locale.US);
            monthlyPayment.setText (myCurrencyFormatter.format (monthly));
        else if (command == clearButton) //clears all text fields
            /* Better than setting it to null (I think) */
            mortgageAmount.setText ("");
            //mortgageTerm.setText(null);
            //interestRate.setText(null);
            monthlyPayment.setText ("");
        else if (command == exitButton) //sets exit button
            System.exit (0);
        else if (command == mortgageTerm)
            /* Programmatically 'clicks' the button,
            As is user had clicked it */
            calculateButton.doClick ();
        else if (command == interestRate)
            calculateButton.doClick ();
        //JComboBox mortgageTerm = (JComboBox) event.getSource ();
        //String termYear = (String) mortgageTerm.getSelectedItem ();
    }Hope this solves your problems.
I also hope you'll be able to learn from what I've indicated, so you can use similar things yourself
in future!
Regards,
lutha

How can I make the combo box turn to the value of black.

When the show button is pressed (and not before), a filled black square should be
displayed in the display area. The combo box (or drop down list) that enables the user to choose the colour of
the displayed shape and the altering should take effect immediately.When the show button is pressed,
the image should immediately revert to the black square, the combo box should show the value that
correspond to the black.
Now ,the problem is: after I pressed show button, the image is reverted to the black square,but I don't know
how can I make the combo box turn to the value of black.
Any help or hint?Thanks a lot!
coding 1.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class test extends JFrame {
     private JPanel buttonPanel;
     private DrawPanel myPanel;
     private JButton showButton;
     private JComboBox colorComboBox;
private boolean isShow;
     private int shape;
     private boolean isFill=true;
private String colorNames[] = {"black", "blue", "cyan", "darkGray", "gray",
"green", "lightgray", "magenta", "orange",
"pink", "red", "white", "yellow"}; // color names list in ComboBox
private Color colors[] = {Color.black, Color.blue, Color.cyan, Color.darkGray,
                          Color.gray, Color.green, Color.lightGray, Color.magenta,
                          Color.orange, Color.pink, Color.red, Color.white, Color.yellow};
     public test() {
     super("Draw Shapes");
     // creat custom drawing panel
myPanel = new DrawPanel(); // instantiate a DrawPanel object
myPanel.setBackground(Color.white);
     // set up showButton
// register an event handler for showButton's ActionEvent
showButton = new JButton ("show");
     showButton.addActionListener(
          // anonymous inner class to handle showButton events
     new ActionListener() {
               // draw a black filled square shape after clicking showButton
     public void actionPerformed (ActionEvent event) {
                         // call DrawPanel method setShowStatus and pass an parameter
          // to decide if show the shape
     myPanel.setShowStatus(true);
               isShow = myPanel.getShowStatus();
                                        shape = DrawPanel.SQUARE;
                    // call DrawPanel method setShape to indicate shape to draw
                                        myPanel.setShape(shape);
                    // call DrawPanel method setFill to indicate to draw a filled shape
                                        myPanel.setFill(true);
                    // call DrawPanel method draw
                                        myPanel.draw();
                         myPanel.setFill(true);
                         myPanel.setForeground(Color.black);
               }// end anonymous inner class
     );// end call to addActionListener
// set up colorComboBox
// register event handlers for colorComboBox's ItemEvent
colorComboBox = new JComboBox(colorNames);
colorComboBox.setMaximumRowCount(5);
colorComboBox.addItemListener(
     // anonymous inner class to handle colorComboBox events
     new ItemListener() {
     // select shape's color
     public void itemStateChanged(ItemEvent event) {
     if(event.getStateChange() == ItemEvent.SELECTED)
     // call DrawPanel method setForeground
     // and pass an element value of colors array
     myPanel.setForeground(colors[colorComboBox.getSelectedIndex()]);
myPanel.draw();
}// end anonymous inner class
); // end call to addItemListener
// set up panel containing buttons
     buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(4, 1, 0, 50));
     buttonPanel.add(showButton);
buttonPanel.add(colorComboBox);
JPanel radioButtonPanel = new JPanel();
radioButtonPanel.setLayout(new GridLayout(2, 1, 0, 20));
Container container = getContentPane();
container.setLayout(new BorderLayout(10,10));
container.add(myPanel, BorderLayout.CENTER);
     container.add(buttonPanel, BorderLayout.EAST);
setSize(500, 400);
     setVisible(true);
     public static void main(String args[]) {
     test application = new test();
     application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
coding 2
import java.awt.*;
import javax.swing.*;
public class DrawPanel extends JPanel {
     public final static int CIRCLE = 1, SQUARE = 2;
     private int shape;
     private boolean fill;
     private boolean showStatus;
private int shapeSize = 100;
private Color foreground;
     // draw a specified shape
public void paintComponent (Graphics g){
          super.paintComponent(g);
          // find center
int x=(getSize().width-shapeSize)/2;
          int y=(getSize().height-shapeSize)/2;
          if (shape == CIRCLE) {
     if (fill == true){
     g.setColor(foreground);
          g.fillOval(x, y, shapeSize, shapeSize);
else{
               g.setColor(foreground);
g.drawOval(x, y, shapeSize, shapeSize);
          else if (shape == SQUARE){
     if (fill == true){
     g.setColor(foreground);
                    g.fillRect(x, y, shapeSize, shapeSize);
else{
                    g.setColor(foreground);
g.drawRect(x, y, shapeSize, shapeSize);
// set showStatus value
public void setShowStatus (boolean s) {
          showStatus = s;
     // return showstatus value
public boolean getShowStatus () {
          return showStatus;
     // set fill value
public void setFill(boolean isFill) {
          fill = isFill;
     // set shape value
public void setShape(int shapeToDraw) {
          shape = shapeToDraw;
// set shapeSize value
public void setShapeSize(int newShapeSize) {
          shapeSize = newShapeSize;
// set foreground value
public void setForeground(Color newColor) {
          foreground = newColor;
     // repaint DrawPanel
public void draw (){
          if(showStatus == true)
          repaint();

Hello,
does setSelectedIndex(int anIndex)
do what you need?
See Java Doc for JComboBox.

How can i display the value fetched from my database back onto my combo box

i have saved a selected value from my combo box in my database.
i want to display the same value on my combo box to the user on a jsp page.
Can someone help me?

<%
String valueInYourDatabase="2";
String[] valuesToDisplay={"1","2","3"};
%>
<SELECT name="square_root_of_for">
<% for(int i=0;i<valuesToDisplay.lngth;i++){
String s=valuesToDisplay;
%>
<OPTION value="<%=s%>" <%=(s.equals(valueInYourDatabase)?"SELECTED":"")%> ><%=s%></OPTION>
<%}%>
</SELECT>
Something like this...
didn't compile it so their are surely errors ;)
regards
Alban

SBO 2005 combo box does not update value at first time

Hi!I developed an addon for sbo 2004 with a combo box populated with the months of the year, and it works. The same code run on SBO 2005 works only after the second selection. Has anyone found the same problem?

definition of the item:
item = form.Items.Add("oMese", SAPbouiCOM.BoFormItemTypes.it_COMBO_BOX)
                item.Left = 245
                item.Top = 5
                item.Width = 80
                item.DisplayDesc = True
                combo = item.Specific
                combo.DataBind.SetBound(True, "", "uMese")
                combo.ValidValues.Add(1, "Gennaio")
                combo.ValidValues.Add(2, "Febbraio")
event handling:
inside ItemEvent in case the item is selected
Case SAPbouiCOM.BoEventTypes.et_COMBO_SELECT
                    Select Case pVal.FormUID
                        Case "PRG_UFM_0002_RegIVAAcq"
                            retCode = oTy_RACQ.FormComboSelect(pVal, BubbleEvent)
Public Shared Function FormComboSelect(ByVal pVal As SAPbouiCOM.ItemEvent, _
                                           ByRef BubbleEvent As Boolean, _
                                           ByRef funCaller As Object, _
                                           ByVal funCallerID As Integer, _
                                           ByRef aForm As SAPbouiCOM.Form) _
                                           As Integer
        Dim msg As String
        Dim edt As SAPbouiCOM.EditText
        Dim cmb As SAPbouiCOM.ComboBox
        Dim obt As SAPbouiCOM.OptionBtn
        Dim cbx As SAPbouiCOM.CheckBox
        Dim mtx As SAPbouiCOM.Matrix
        Try
            If pVal.Before_Action = True Then
                Select Case pVal.ItemUID
                    Case "oMese"
                        Dim stre As New strEstremi
                        cmb = aForm.Items.Item("oMese").Specific
                        edt = aForm.Items.Item("anno").Specific
                        If Not cmb.Selected Is Nothing Then
                            GetEstremiPeriod(edt.Value, cmb.Selected.Value, "M", stre)
                            edt = aForm.Items.Item("dtFrom").Specific
                            edt.String = stre.dtFrom
                            edt = aForm.Items.Item("dtTo").Specific
                            edt.String = stre.dtTo
                        End If
end function
thank you I hope is enough otherwise please tell me

How do I make a combo box in LabVIEW 6.1?

I have found reference to the combo box on this site, but it is not in the LabVIEW help for 6.1. Is there a custom VI I can use?
Thanks,
Steve

The combo box was introduced with LabVIEW 7 and is a special type of string control. Prior to 7, everyone used either a ring or enum control. These are all numeric controls and in order to get the string value of the selected item, you have to use the Strings[] property and use the value of control to index the string array. I've attached a 6.1 VI that shows the different controls and how to index the string value to use them in a case statement. For connection to a case statement, it is not required to get the string value - it can be wired directly to the selector.
Attachments:
ring_controls.vi ‏37 KB

Combo box strings

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