[Solved] Async Wait issues with view updation in UWP

Question

Since calling Bindings.Update() fixed your issue, your binding expressions should be correct, but somehow the property change notification fails.

I am not going to guess what really went wrong here but to explain when you should be using Bindings.Update(), and when you should be using INPC + OneWay bindings.

Bindings.Update() is only available for x:Bind, unlike traditional binding, if your UI rarely needs to update with new data, you don’t have to implement INPC with your properties, in fact, it’s actually much cheaper and more performant doing OneTime bindings (with calling Bindings.Update()) than implementing INPC with OneWay bindings.

So, the following will work with x:Bind –

<TextBlock Text="{x:Bind MyText}" Style="{StaticResource SubheaderTextBlockStyle}" />

public string MyText { get; set; }

private void Button_Click(object sender, RoutedEventArgs e)
{
    MyText = "new text!!";
    Bindings.Update();
}

Once the Button is clicked, the TextBlock will be populated with new text!!. Note here I use the default OneTime binding (i.e. {x:Bind MyText}) and MyText is just a a normal CLR property.

This only works because I called Bindings.Update() in the end, which forces OneTime bindings to be re-initialized.

However, like I said earlier, please only consider using the above approach when your UI rarely needs to update. Most of the time this is not the case, so you will still implement INPC and write OneWay binding, without the need of using Bindings.Update() at all.

Accepted Answer