/// <summary>
/// Requests the user to pick an image.
/// </summary>
/// <param name="page">Caller page for displaying messages.</param>
public async Task PickImageAsync(Page page)
{
IsImageSetCompleted = false;
var image = await ImageProvider.PickImageAsync(page);
if (image != null)
{
await SetImageStreamAsync(image);
IsImageSetCompleted = true;
}
}