Timer for camera feature in UWP - timer

Question

I am currently development a UWP application and I have a camera feature in my program. However I wish to implement timers for the feature.
I wish to allow the user to select their preferred timing at the side, and click on the "Take a picture" button and on the camera screen it will show a timer and the event under the onclick for the "take a picture" button will be delayed according to the user's selection.
Here is my code from .xaml:
<CaptureElement Name="PreviewControl" Margin="566,77,166,50"/>
<Button x:Name="PhotoButton" Content="Take a picture!" HorizontalAlignment="Left" Margin="990,678,0,-91" VerticalAlignment="Top" Click="PhotoButton_Click" Height="45" Width="313" Background="White" Foreground="Black"/>
//Timer buttons
<Button x:Name="Timer_3sec" Content="3 seconds" HorizontalAlignment="Left" Margin="138,125,0,0" VerticalAlignment="Top" Height="66" Width="262" Background="White" Foreground="Black"/>
<Button x:Name="Timer_5sec" Content="5 seconds" HorizontalAlignment="Left" Margin="138,234,0,0" VerticalAlignment="Top" Height="66" Width="262" Background="White" Foreground="Black"/>
<Button x:Name="Timer_7sec" Content="7 seconds" HorizontalAlignment="Left" Margin="138,337,0,0" VerticalAlignment="Top" Height="66" Width="262" Background="White" Foreground="Black"/>
Codes from xaml.cs:
private async void PhotoButton_Click(object sender, RoutedEventArgs e)
{
await TakePhotoAsync();
}
private async Task TakePhotoAsync()
{
var stream = new InMemoryRandomAccessStream();
Debug.WriteLine("Taking photo...");
await _mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), stream);
try
{
var file = await _captureFolder.CreateFileAsync("SimplePhoto.jpg", CreationCollisionOption.GenerateUniqueName);
Debug.WriteLine("Photo taken! Saving to " + file.Path);
var photoOrientation = CameraRotationHelper.ConvertSimpleOrientationToPhotoOrientation(_rotationHelper.GetCameraCaptureOrientation());
await ReencodeAndSavePhotoAsync(stream, file, photoOrientation);
Debug.WriteLine("Photo saved!");
await Helpers.MessageDialogHelpers.ShowNoActionMessageBox("Your photo has been taken!", "");
}
catch (Exception ex)
{
// File I/O errors are reported as exceptions
Debug.WriteLine("Exception when taking a photo: " + ex.ToString());
}
}

Answer 1

Create a field in your code behind:
private int _seconds;
Set appropriate time in button handler:
private void Timer_3sec_Click(object sender, RoutedEventArgs e)
{
_seconds = 3;
}
Add the delay to photo button handler:
private async void PhotoButton_Click(object sender, RoutedEventArgs e)
{
await Task.Delay(TimeSpan.FromSeconds(_seconds));
await TakePhotoAsync();
}
This should be enough. If you will notice that your code behind is getting to complex because you are adding all the logic there try to read about MVVM.