How do I change and instance variable for an object which the user selects from a combobox?

How do I change and instance variable for an object which the user selects from a combobox?

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How do I change and instance variable for an object which the user selects from a combobox?
Tag : java , By : Robert MacGregor
Date : November 24 2020, 03:41 PM

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User selects something in combobox, something else is sent to dependency property

Tag : chash , By : Lars
Date : March 29 2020, 07:55 AM
Hope this helps You could create a class DateFormatChoice that contains a property for the format code (e.g., "m" or "D") and a property for the current date formatted in that way.
public class DateFormatChoice {
    public string FormatCode { get; private set; }
    public string CurrentDateExample {
        get { return DateTime.Now.ToString( FormatCode ) }

    public DateFormatChoice( string standardcode ) {
        FormatCode = standardcode;
public class DateFormatChoices : List<DateFormatChoice> {
    public DateFormatChoices() {
        this.Add( new DateFormatChoice( "m" ) );
        this.Add( new DateFormatChoice( "d" ) );
        this.Add( new DateFormatChoice( "D" ) );
public class ViewModel : INotifyPropertyChanged {
    public event PropertyChangedEventHandler PropertyChanged = ( s, e ) => {
    }; // the lambda ensures PropertyChanged is never null

    public DateFormatChoices Choices {
        private set;

    DateFormatChoice _chosen;
    public DateFormatChoice Chosen {
        get {
            return _chosen;
        set {
            _chosen = value;
            Notify( PropertyChanged, () => Chosen );

    public DateTime CurrentDateTime {
        get {
            return DateTime.Now;

    public ViewModel() {
        Choices = new DateFormatChoices();

    // expression used to avoid string literals
    private void Notify<T>( PropertyChangedEventHandler handler, Expression<Func<T>> expression ) {
        var memberexpression = expression.Body as MemberExpression;
        handler( this, new PropertyChangedEventArgs( memberexpression.Member.Name ) );
    <TextBlock Name="datedisplayer" />
private static void DateFormatChanged( DependencyObject obj, DependencyPropertyChangedEventArgs e ) {
    var uc = obj as UserControl1;
    string code;
    if ( null != ( code = e.NewValue as string ) ) {
        uc.datedisplayer.Text = DateTime.Now.ToString( code );
        <local:ViewModel />
        ItemsSource="{Binding Choices}" DisplayMemberPath="CurrentDateExample"
        SelectedItem="{Binding Chosen, Mode=TwoWay}"/>
        DateFormatProperty="{Binding Chosen.FormatCode}" />

Rails, change db value when user selects combobox value

Tag : jquery , By : vbanos
Date : March 29 2020, 07:55 AM
I hope this helps . 1) When updating data, use a PUT request. That's the basic RESTful style of Rails (GET → show, POST → create, PUT → update, DELETE → destroy). So basically, the action to call is LocationsController#update (judging by the code you posted). No need for a new action
2) Put the entire update path in a data- attribute on the element. I'm assuming you mean "dropdown" when you say "combobox", in which case it'd be something like

Activate text box when the user selects a value in a combobox

Tag : javascript , By : user94076
Date : March 29 2020, 07:55 AM
will help you When a user ONLY selects Male from the following combobox, i want to display a textfield below. This should only happen when the user selects the value Male. , try this
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
body #container .item .bg_img{background:url('search-icon-2x.png') no-repeat; height:50px;}
function genderfind(val) {
            //var element = document.getElementById('gender').value;
            if (val == 'male' ) {
                document.getElementById('genderbox').style.display = 'block';
            } else {
                document.getElementById('genderbox').style.display = 'none';

<div id="container">
    <div class="item">
        <div class="bg_img"></div>
        <p>lorem ipsum.</p>
        <td align="left">
            <select id="gender" name="gender" onchange='genderfind(this.value);'>
            <option value="female">female</option>
            <option value="male">Male</option>
        <td id="genderbox" style="display:none;">
            <input type="text" name="name" />

What event is triggered when user selects value from drop down ComboBox (ActiveX)?

Tag : vba , By : johntynan
Date : March 29 2020, 07:55 AM
I wish did fix the issue. What event is triggered when user selects value from drop down ComboBox (Active X). How it can be defined in VBA. I would like to trigger macro when value is selected from drop down. , ComboBox_Click() is the event you are looking for.

How set combobox value when user selects a value in another combobox

Tag : javafx , By : Al Dimond
Date : March 29 2020, 07:55 AM
it fixes the issue Your problem is that you try to instantiate the calibreList again by doing calibrelist = FXCollections.observableList(cal);. If calibreList is the list that contains the items of the ComboBox, which has been added to the ComboBox by doing caliberComboBox.setItems(calibreList);, then you need to manipulate that original list instead of instantiating it again.
So instead of calibrelist = FXCollections.observableList(cal);, do calibrelist.add(a.getCalibre);
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