// This example shows how to unsubscribe from all event notifications.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.
using System;
using System.Threading;
using OpcLabs.EasyOpc.AlarmsAndEvents;
using OpcLabs.EasyOpc.AlarmsAndEvents.OperationModel;
namespace DocExamples.AlarmsAndEvents._EasyAEClient
{
class UnsubscribeAllEvents
{
public static void Main1()
{
// Instantiate the client object.
using (var client = new EasyAEClient())
{
var eventHandler = new EasyAENotificationEventHandler(client_Notification);
client.Notification += eventHandler;
Console.WriteLine("Subscribing...");
client.SubscribeEvents("", "OPCLabs.KitEventServer.2", 1000);
Console.WriteLine("Waiting for 10 seconds...");
Thread.Sleep(10 * 1000);
Console.WriteLine("Unsubscribing...");
client.UnsubscribeAllEvents();
Console.WriteLine("Waiting for 10 seconds...");
Thread.Sleep(10 * 1000);
}
}
// Notification event handler
static void client_Notification(object sender, EasyAENotificationEventArgs e)
{
if (!e.Succeeded)
{
Console.WriteLine("*** Failure: {0}", e.ErrorMessageBrief);
return;
}
if (!(e.EventData is null))
Console.WriteLine(e.EventData.Message);
}
}
}
' This example shows how to unsubscribe from all event notifications.
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET .
' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
' a commercial license in order to use Online Forums, and we reply to every post.
Imports System.Threading
Imports OpcLabs.EasyOpc.AlarmsAndEvents
Imports OpcLabs.EasyOpc.AlarmsAndEvents.OperationModel
Namespace AlarmsAndEvents._EasyAEClient
Friend Class UnsubscribeAllEvents
Public Shared Sub Main1()
Using client = New EasyAEClient()
Dim eventHandler = New EasyAENotificationEventHandler(AddressOf client_Notification)
AddHandler client.Notification, eventHandler
Console.WriteLine("Subscribing...")
client.SubscribeEvents("", "OPCLabs.KitEventServer.2", 1000)
Console.WriteLine("Waiting for 10 seconds...")
Thread.Sleep(10 * 1000)
Console.WriteLine("Unsubscribing...")
client.UnsubscribeAllEvents()
Console.WriteLine("Waiting for 10 seconds...")
Thread.Sleep(10 * 1000)
End Using
End Sub
' Notification event handler
Private Shared Sub client_Notification(ByVal sender As Object, ByVal e As EasyAENotificationEventArgs)
If Not e.Succeeded Then
Console.WriteLine("*** Failure: {0}", e.ErrorMessageBrief)
Exit Sub
End If
If e.EventData IsNot Nothing Then
Console.WriteLine(e.EventData.Message)
End If
End Sub
End Class
End Namespace
# This example shows how to unsubscribe from all event notifications.
#
# Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
# OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python .
# Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
# a commercial license in order to use Online Forums, and we reply to every post.
# 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 *
# Notification event handler
def notification(sender, e):
if not e.Succeeded:
print('*** Failure: ', e.ErrorMessageBrief, sep='')
return
else:
if e.EventData is not None:
print(e.EventData.Message)
# Instantiate the client object
client = EasyAEClient()
client.Notification += notification
print('Subscribing events...')
IEasyAEClientExtension.SubscribeEvents(client, '', 'OPCLabs.KitEventServer.2', 1000)
print('Waiting for 10 seconds...')
time.sleep(10)
print('Unsubscribing events...')
client.UnsubscribeAllEvents()
print('Waiting for 10 seconds...')
time.sleep(10)
client.Notification -= notification
print('Finished.')
