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ITitleBarAutoSuggestBoxAware

Consider the following situation:

  • MVVM Pattern
  • AutosuggestBox in the title bar
  • Doing something like searching through a box in all views

implement ITitleBarAutoSuggestBoxAware in your viewmodels:

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public partial class ServerViewModel : ITitleBarAutoSuggestBoxAware
{
    public void OnAutoSuggestBoxTextChanged(AutoSuggestBox sender, AutoSuggestBoxTextChangedEventArgs args)
    {
        Search(sender.Text);
    }

    public void OnAutoSuggestBoxQuerySubmitted(AutoSuggestBox sender, AutoSuggestBoxQuerySubmittedEventArgs args)
    {
        Search(sender.Text);
    }
}

and in your MainPage or wherever your box is located:

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private void AutoSuggestBox_TextChanged(AutoSuggestBox sender, AutoSuggestBoxTextChangedEventArgs args)
{
    var viewModel = NavFrame.GetPageViewModel();
var frameContentAOTSafe = NavFrame?.Content;
if (frameContentAOTSafe is Page page && page?.DataContext is ITitleBarAutoSuggestBoxAware viewModelAOTSafe)
{
    viewModelAOTSafe.OnAutoSuggestBoxTextChanged(sender, args);
}
else if (viewModel != null && viewModel is ITitleBarAutoSuggestBoxAware titleBarAutoSuggestBoxAware)
{
    titleBarAutoSuggestBoxAware.OnAutoSuggestBoxTextChanged(sender, args);
}
}

private void AutoSuggestBox_QuerySubmitted(AutoSuggestBox sender, AutoSuggestBoxQuerySubmittedEventArgs args)
{
    var viewModel = NavFrame.GetPageViewModel();
var frameContentAOTSafe = NavFrame?.Content;
if (frameContentAOTSafe is Page page && page?.DataContext is ITitleBarAutoSuggestBoxAware viewModelAOTSafe)
{
    viewModelAOTSafe.OnAutoSuggestBoxQuerySubmitted(sender, args);
}
else if (viewModel != null && viewModel is ITitleBarAutoSuggestBoxAware titleBarAutoSuggestBoxAware)
{
    titleBarAutoSuggestBoxAware.OnAutoSuggestBoxQuerySubmitted(sender, args);
}
}
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