// This example shows how to subscribe to events and obtain the notification events by pulling them.
using System;
using OpcLabs.EasyOpc.AlarmsAndEvents;
using OpcLabs.EasyOpc.AlarmsAndEvents.OperationModel;
namespace DocExamples.AlarmsAndEvents._EasyAEClient
{
class PullNotification
{
public static void Main1()
{
// Instantiate the client object.
// In order to use event pull, you must set a non-zero queue capacity upfront.
using (var client = new EasyAEClient { PullNotificationQueueCapacity = 1000 })
{
Console.WriteLine("Subscribing events...");
int handle = client.SubscribeEvents("", "OPCLabs.KitEventServer.2", 1000);
Console.WriteLine("Processing event notifications for 1 minute...");
int endTick = Environment.TickCount + 60 * 1000;
do
{
EasyAENotificationEventArgs eventArgs = client.PullNotification(2 * 1000);
if (!(eventArgs is null))
// Handle the notification event
Console.WriteLine(eventArgs);
} while (Environment.TickCount < endTick);
Console.WriteLine("Unsubscribing events...");
client.UnsubscribeEvents(handle);
Console.WriteLine("Finished.");
}
}
}
}
# This example shows how to subscribe to events and obtain the notification events by pulling them.
#requires -Version 5.1
using namespace OpcLabs.EasyOpc.AlarmsAndEvents
# The path below assumes that the current directory is [ProductDir]/Examples-NET/PowerShell/Windows .
Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcClassicCore.dll"
Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcClassic.dll"
Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcClassicComponents.dll"
# Instantiate the client object.
$client = New-Object EasyAEClient
# In order to use event pull, you must set a non-zero queue capacity upfront.
$client.PullNotificationQueueCapacity = 1000
Write-Host "Subscribing events..."
$handle = [OpcLabs.EasyOpc.AlarmsAndEvents.IEasyAEClientExtension]::SubscribeEvents($client,
"", "OPCLabs.KitEventServer.2", 1000)
Write-Host "Processing event notifications for 1 minute..."
$stopwatch = [System.Diagnostics.Stopwatch]::StartNew()
while ($stopwatch.Elapsed.TotalSeconds -lt 60) {
$eventArgs = $client.PullNotification(2*1000)
if ($eventArgs -ne $null) {
# Handle the notification event
Write-Host $eventArgs
}
}
Write-Host "Unsubscribing events..."
$client.UnsubscribeEvents($handle)
Write-Host "Finished."
# This example shows how to subscribe to events and obtain the notification events by pulling them.
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc
import time
# Import .NET namespaces.
from OpcLabs.EasyOpc import *
from OpcLabs.EasyOpc.AlarmsAndEvents import *
# Instantiate the client object
client = EasyAEClient()
# In order to use event pull, you must set a non-zero queue capacity upfront.
client.PullNotificationQueueCapacity = 1000
print('Subscribing events...')
handle = IEasyAEClientExtension.SubscribeEvents(client, '', 'OPCLabs.KitEventServer.2', 1000)
print('Processing event notifications for 1 minute...')
endTime = time.time() + 60
while time.time() < endTime:
eventArgs = IEasyAEClientExtension.PullNotification(client, 2*1000)
if eventArgs is not None:
# Handle the notification event
print(eventArgs)
print('Unsubscribing events...')
client.UnsubscribeAllEvents()
print('Finished.')
' This example shows how to subscribe to events and obtain the notification events by pulling them.
Imports OpcLabs.EasyOpc.AlarmsAndEvents
Imports OpcLabs.EasyOpc.AlarmsAndEvents.OperationModel
Namespace AlarmsAndEvents._EasyAEClient
Partial Friend Class PullNotification
Public Shared Sub Main1()
Using client = New EasyAEClient()
' In order to use event pull, you must set a non-zero queue capacity upfront.
client.PullNotificationQueueCapacity = 1000
Console.WriteLine("Subscribing events...")
Dim handle As Integer = client.SubscribeEvents("", "OPCLabs.KitEventServer.2", 1000)
Console.WriteLine("Processing event notifications for 1 minute...")
Dim endTick As Integer = Environment.TickCount + 60 * 1000
Do
Dim eventArgs As EasyAENotificationEventArgs = client.PullNotification(2 * 1000)
If Not eventArgs Is Nothing Then
' Handle the notification event
Console.WriteLine(eventArgs)
End If
Loop While Environment.TickCount < endTick
Console.WriteLine("Unsubscribing events...")
client.UnsubscribeEvents(handle)
End Using
Console.WriteLine("Finished.")
End Sub
End Class
End Namespace
