如何在Windows Phone中将后退按钮应用于画布？

Question

I am trying to do an windows application. In the below image you can see that in Page1 where a button is there. When I select this button a canvas is opened. What I want to do is? When this canvas is opened in the Page1(right side) itself, if I select back button of windows phone. Then the canvas should disappear. How to do this kind of task?

Answer 1

You can detect and cancel the navigation with the back button by overriding the OnBackKeyPress method and setting e.Cancel to true.

From there, it's just a matter of detecting whether the canvas is displayed.

protected override void OnBackKeyPress(CancelEventArgs e)
{
    if (EHeightCanvas.Visibility == System.Windows.Visibility.Visible)
    {
        e.Cancel = true;
        EHeightCanvas.Visibility = System.Windows.Visibility.Collapsed;
    }
}