public static void Main1()
{
// Instantiate the client object
// In order to use event pull, you must set a non-zero queue capacity upfront.
var easyUAClient = new EasyUAClient {
PullEventNotificationQueueCapacity = 1000
};
Console.WriteLine("Subscribing...");
easyUAClient.SubscribeEvent(
"opc.tcp://opcua.demo-this.com:62544/Quickstarts/AlarmConditionServer",
UAObjectIds.Server,
1000);
Console.WriteLine("Processing event notifications for 30 seconds...");
int endTick = Environment.TickCount + 30 * 1000;
do
{
EasyUAEventNotificationEventArgs eventArgs = easyUAClient.PullEventNotification(2 * 1000);
if (eventArgs != null)
{
// Handle the notification event
Console.WriteLine(eventArgs);
}
} while (Environment.TickCount < endTick);
}
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);
}
static void easyUAClient_EventNotification(object sender, EasyUAEventNotificationEventArgs e)
{
Console.WriteLine();
// Display the event
if (e.EventData == null)
{
Console.WriteLine(e);
return;
}
Console.WriteLine("All fields:");
foreach (KeyValuePair <UAAttributeField, ValueResult> pair in e.EventData.FieldResults)
{
UAAttributeField attributeField = pair.Key;
ValueResult valueResult = pair.Value;
Console.WriteLine(" {0} -> {1}", attributeField, valueResult);
}
// Extracting a specific field using a standard operand symbol
Console.WriteLine("Source name: {0}",
e.EventData.FieldResults[UABaseEventObject.Operands.SourceName]);
// Extracting a specific field using an event type ID and a simple relative path
Console.WriteLine("Message: {0}",
e.EventData.FieldResults[UAFilterElements.SimpleAttribute(UAObjectTypeIds.BaseEventType, "/Message")]);
}
static void easyUAClient_EventNotification(object sender, EasyUAEventNotificationEventArgs e)
{
// Display the event
Console.WriteLine(e);
}
