public static IObservable <SymbolNotification> WhenNotification(this IAdsConnection client, ISymbolCollection symbols, NotificationSettings settings)
{
if (symbols == null)
{
throw new ArgumentNullException("symbols");
}
ISymbol local1 = Enumerable.FirstOrDefault <ISymbol>(symbols);
if (local1 == null)
{
throw new ArgumentOutOfRangeException("Symbols list is empty!", "symbols");
}
IValueSymbol symbol = local1 as IValueSymbol;
if (symbol == null)
{
throw new ArgumentOutOfRangeException("Symbols in list are not IValueSymbol", "symbols");
}
IAccessorValueFactory valueFactory = symbol.ValueAccessor.ValueFactory;
IDisposableSymbolHandleBag bag = null;
object userData = new object();
return(Observable.Where <SymbolNotification>(Observable.Select <EventPattern <AdsNotificationEventArgs>, SymbolNotification>(Observable.Where <EventPattern <AdsNotificationEventArgs> >(Observable.FromEventPattern <AdsNotificationEventHandler, AdsNotificationEventArgs>(delegate(AdsNotificationEventHandler h) {
client.AdsNotification += h;
bag = new DisposableNotificationHandleBag(client, symbols, settings, userData);
}, delegate(AdsNotificationEventHandler h) {
bag.Dispose();
bag = null;
client.AdsNotification -= h;
}), ev => bag.Contains((uint)ev.get_EventArgs().NotificationHandle)), ev => new SymbolNotification(ev.get_EventArgs(), bag.GetSymbol((uint)ev.get_EventArgs().NotificationHandle), valueFactory)), s => symbols.Contains(s.Symbol)));
}
public static IObservable <SymbolNotification> WhenNotification(this IAdsConnection client, ISymbol symbol, NotificationSettings settings)
{
if (symbol == null)
{
throw new ArgumentNullException("symbol");
}
if (symbol == null)
{
throw new ArgumentOutOfRangeException("Symbol is not an IValueSymbol", "symbol");
}
List <ISymbol> symbols = new List <ISymbol> {
symbol
};
IDisposableSymbolHandleBag bag = null;
IAccessorValueFactory fac = ((IAccessorValue)(symbol as IValueSymbol).ValueAccessor).ValueFactory;
object userData = new object();
return(Observable.Select <EventPattern <AdsNotificationEventArgs>, SymbolNotification>(Observable.Where <EventPattern <AdsNotificationEventArgs> >(Observable.FromEventPattern <AdsNotificationEventHandler, AdsNotificationEventArgs>(delegate(AdsNotificationEventHandler h) {
client.AdsNotification += h;
bag = new DisposableNotificationHandleBag(client, symbols, settings, userData);
}, delegate(AdsNotificationEventHandler h) {
bag.Dispose();
bag = null;
client.AdsNotification -= h;
}), ev => bag.Contains((uint)ev.get_EventArgs().NotificationHandle)), ev => new SymbolNotification(ev.get_EventArgs(), bag.GetSymbol((uint)ev.get_EventArgs().NotificationHandle), fac)));
}