Change App language at RunTime on-the-fly

Question

I\'m currently developing a metro app in which the user can change current language at runtime and all the custom controls that are loaded must update their text regarding t

Answer 1

You can change the app's language at runtime with the help of this source code. I took help from this and manipulated my app's language settings page as follows:
In languageSettings.xaml.cs:

public partial class LanguageSettings : PhoneApplicationPage
    {
        public LanguageSettings()
        {
            InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);

            if (ChangeLanguageCombo.Items.Count == 0)
            {   ChangeLanguageCombo.Items.Add(LocalizationManager.SupportedLanguages.En);
                ChangeLanguageCombo.Items.Add(LocalizationManager.SupportedLanguages.Bn);
            }
            SelectChoice();
        }



        private void ButtonSaveLang_OnClick(object sender, RoutedEventArgs e)
        {
            //Store the Messagebox result in result variable

            MessageBoxResult result = MessageBox.Show("App language will be changed. Do you want to continue?", "Apply Changes", MessageBoxButton.OKCancel);

            //check if user clicked on ok
            if (result == MessageBoxResult.OK)
            {

                var languageComboBox = ChangeLanguageCombo.SelectedItem;

                LocalizationManager.ChangeAppLanguage(languageComboBox.ToString());
                //Application.Current.Terminate(); I am commenting out because I don't neede to restart my app anymore.
            }
            else
            {
                SelectChoice();
            }
        }

        private void SelectChoice()
        {
           //Select the saved language

            string lang = LocalizationManager.GetCurrentAppLang();
            if(lang == "bn-BD")
                ChangeLanguageCombo.SelectedItem = ChangeLanguageCombo.Items[1];
            else
            {
                ChangeLanguageCombo.SelectedItem = ChangeLanguageCombo.Items[0];
            }
        }
    }

***Note: Before understanding what I did on LanguageSettings page's code behind, you must implement the codes from the link as stated earlier. And also it may be noted that I am working on windows phone 8

Answer 2

In order to respond right away, you would need to reset the context of the resource manager.

For Windows 8.1: var resourceContext = Windows.ApplicationModel.Resources.Core.ResourceContext.GetForCurrentView();

resourceContext.Reset();

You will still need to force your page to redraw itself and thus re-request the resources to get the changes to take place. For Windows 8, you can see https://timheuer.com/blog/archive/2013/03/26/howto-refresh-languages-winrt-xaml-windows-store.aspx

Answer 3

Use this:

var NewLanguage = (string)((ComboBoxItem)e.AddedItems[0]).Tag;

Windows.Globalization.ApplicationLanguages.PrimaryLanguageOverride = NewLanguage;

Windows.ApplicationModel.Resources.Core.ResourceContext.GetForViewIndependentUse().Reset();
//Windows.ApplicationModel.Resources.Core.ResourceContext.GetForCurrentView().Reset();

Windows.ApplicationModel.Resources.Core.ResourceManager.Current.DefaultContext.Reset();

and then reload your Page, using Navigate method:

if (Frame != null)
    Frame.Navigate(typeof(MyPage));