async void FindPrinter_Click()
{
isBusy = true;
UpdateButtons();
rootPage.NotifyUser("", NotifyType.StatusMessage);
rootPage.ReleaseAllPrinters();
// Select a PosPrinter device using the Device Picker.
DevicePicker devicePicker = new DevicePicker();
devicePicker.Filter.SupportedDeviceSelectors.Add(PosPrinter.GetDeviceSelector());
// Anchor the picker on the Find button.
GeneralTransform ge = FindButton.TransformToVisual(Window.Current.Content as UIElement);
Rect rect = ge.TransformBounds(new Rect(0, 0, FindButton.ActualWidth, FindButton.ActualHeight));
DeviceInformation deviceInfo = await devicePicker.PickSingleDeviceAsync(rect);
rootPage.deviceInfo = deviceInfo;
PosPrinter printer = null;
if (deviceInfo != null)
{
printer = await PosPrinter.FromIdAsync(deviceInfo.Id);
}
if (printer != null && printer.Capabilities.Receipt.IsPrinterPresent)
{
rootPage.Printer = printer;
rootPage.NotifyUser("Found receipt printer.", NotifyType.StatusMessage);
}
else
{
// Get rid of the printer we can't use.
printer?.Dispose();
rootPage.NotifyUser("Please select a device whose printer is present.", NotifyType.ErrorMessage);
}
isBusy = false;
UpdateButtons();
}
