/// <summary>
/// This event handler is invoked when a Bidi response is raised.
/// </summary>
private async void OnBidiResponseReceived(object sender, PrinterQueueEventArgs responseArguments)
{
// Invoke the ink level event with appropriate data.
// Dispatching this event invocation to the UI thread is required because in JavaScript,
// events handlers need to be invoked on the UI thread.
await dispatcher.RunAsync(
Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
OnInkLevelReceived(sender, ParseResponse(responseArguments));
});
}
/// <summary>
/// Parse the bidi response argument.
/// </summary>
/// <param name="responseArguments">The bidi response</param>
/// <returns>A string that contains either the bidi response string or explains the invalid result.</returns>
private string ParseResponse(PrinterQueueEventArgs responseArguments)
{
if (responseArguments.StatusHResult == (int)HRESULT.S_OK)
return responseArguments.Response;
else
return InvalidHResult(responseArguments.StatusHResult);
}
/// <summary>
/// This is the method invoked when a bidi response is received.
/// </summary>
/// <param name="sender">IPrinterQueue object.</param>
/// <param name="e">The results of the bidi response.</param>
private void OnBidiResponseReceived(object sender, PrinterQueueEventArgs e)
{
if (e.StatusHResult != (int)HRESULT.S_OK)
{
MockInkStatus();
return;
}
//
// Display the ink levels from the mock data.
//
BidiHelperSource = new BidiHelper(e.Response);
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs("BidiHelperSource"));
}
InkStatusTitle = "Ink status (Live data)";
}