static void easyUAClient_EventNotification(object sender, EasyUAEventNotificationEventArgs e)
{
Console.WriteLine();
// Display the event
if (e.EventData == null)
{
Console.WriteLine(e);
return;
}
UABaseEventObject baseEventObject = e.EventData.BaseEvent;
Console.WriteLine("Source name: {0}", baseEventObject.SourceName);
Console.WriteLine("Message: {0}", baseEventObject.Message);
Console.WriteLine("Severity: {0}", baseEventObject.Severity);
}
public static void Main1()
{
// Instantiate the client object
var easyUAClient = new EasyUAClient();
UANodeId nodeId = null;
byte[] eventId = null;
var anEvent = new ManualResetEvent(initialState: false);
Console.WriteLine("Subscribing...");
easyUAClient.SubscribeEvent(
"opc.tcp://opcua.demo-this.com:62544/Quickstarts/AlarmConditionServer",
UAObjectIds.Server,
1000,
new UAEventFilterBuilder(
UAFilterElements.Equals(
UABaseEventObject.Operands.NodeId,
new UANodeId(expandedText: "nsu=http://opcfoundation.org/Quickstarts/AlarmCondition;ns=2;s=1:Colours/EastTank?Yellow")),
UABaseEventObject.AllFields),
(sender, eventArgs) =>
{
if (!eventArgs.Succeeded)
{
Console.WriteLine(eventArgs.ErrorMessageBrief);
return;
}
if (eventArgs.EventData != null)
{
UABaseEventObject baseEventObject = eventArgs.EventData.BaseEvent;
Console.WriteLine(baseEventObject);
// Make sure we do not catch the event more than once
if (anEvent.WaitOne(0))
{
return;
}
nodeId = baseEventObject.NodeId;
eventId = baseEventObject.EventId;
anEvent.Set();
}
},
state: null);
Console.WriteLine("Waiting for an event for 30 seconds...");
if (!anEvent.WaitOne(30 * 1000))
{
Console.WriteLine("Event not received");
return;
}
Console.WriteLine("Acknowledging an event...");
easyUAClient.Acknowledge(
"opc.tcp://opcua.demo-this.com:62544/Quickstarts/AlarmConditionServer",
nodeId,
eventId,
"Acknowledged by an automated example code");
Console.WriteLine("Waiting for 5 seconds...");
Thread.Sleep(5 * 1000);
Console.WriteLine("Unsubscribing...");
easyUAClient.UnsubscribeAllMonitoredItems();
Console.WriteLine("Waiting for 5 seconds...");
Thread.Sleep(5 * 1000);
}
