private IObservable <PnpEventArgs> CreateWhenPnp()
{
return(Observable.FromEvent(
(Action <PnpEventArgs> handler) =>
new _ICoreScannerEvents_PNPEventEventHandler(
delegate(Int16 eventType, ref String data)
{
handler(PnpEventArgs.Parse(eventType, data));
}),
handler => this.coreScanner.PNPEvent += handler,
handler => this.coreScanner.PNPEvent -= handler));
}
/// <summary>
///
/// </summary>
/// <param name="eventType"></param>
/// <param name="outXml"></param>
/// <returns></returns>
public static PnpEventArgs Parse(Int16 eventType, String outXml)
{
PnpEventArgs eventArgs = new PnpEventArgs();
XElement argXml = XDocument
.Parse(outXml)
.Elements("outArgs")
.SelectMany(outArgs => outArgs
.Elements("arg-xml"))
.FirstOrDefault();
Int32 statusValue = argXml
.Elements("status")
.Select(status => status.Value.ToInt32())
.FirstOrDefault();
XElement scannerInfo = argXml
.Elements("scanners")
.SelectMany(scanners => scanners
.Elements("scanner"))
.FirstOrDefault();
eventArgs.eventType = (PnpEventType)eventType;
eventArgs.scannerInfo = ScannerInfo.Parse(scannerInfo.ToString());
return(eventArgs);
}
