Push-based notification provider (observable) for OPC Alarms&Events notifications.
Object Model
Syntax
[ComVisible(false)]
[TypeConverter(System.ComponentModel.ExpandableObjectConverter)]
[CLSCompliant(true)]
[ValueControl("OpcLabs.BaseLib.Forms.Common.ObjectSerializationControl, OpcLabs.BaseLibForms, Version=5.81.455.1, Culture=neutral, PublicKeyToken=6faddca41dacb409",
DefaultReadWrite=false,
Export=true,
PageId=10001)]
[Serializable()]
public class AENotificationObservable : AEReactive, LINQPad.ICustomMemberProvider, OpcLabs.BaseLib.ComTypes._Info, OpcLabs.BaseLib.ComTypes._Object2, System.ICloneable, System.IObservable<EasyAENotificationEventArgs>, System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable
[ComVisible(false)]
[TypeConverter(System.ComponentModel.ExpandableObjectConverter)]
[CLSCompliant(true)]
[ValueControl("OpcLabs.BaseLib.Forms.Common.ObjectSerializationControl, OpcLabs.BaseLibForms, Version=5.81.455.1, Culture=neutral, PublicKeyToken=6faddca41dacb409",
DefaultReadWrite=false,
Export=true,
PageId=10001)]
[Serializable()]
public ref class AENotificationObservable : public AEReactive, LINQPad.ICustomMemberProvider, OpcLabs.BaseLib.ComTypes._Info, OpcLabs.BaseLib.ComTypes._Object2, System.ICloneable, System.IObservable<EasyAENotificationEventArgs>, System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable
'Declaration
<ComVisibleAttribute(False)>
<TypeConverterAttribute(System.ComponentModel.ExpandableObjectConverter)>
<CLSCompliantAttribute(True)>
<ValueControlAttribute("OpcLabs.BaseLib.Forms.Common.ObjectSerializationControl, OpcLabs.BaseLibForms, Version=5.81.455.1, Culture=neutral, PublicKeyToken=6faddca41dacb409",
DefaultReadWrite=False,
Export=True,
PageId=10001)>
<SerializableAttribute()>
Public Class AENotificationObservable
Inherits AEReactive
Implements LINQPad.ICustomMemberProvider, OpcLabs.BaseLib.ComTypes._Info, OpcLabs.BaseLib.ComTypes._Object2, System.ICloneable, System.IObservable(Of EasyAENotificationEventArgs), System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable
Example
// Shows how to create an observable for OPC-A&E notifications, and subscribe to it.
//
// 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.Reactive;
namespace ReactiveDocExamples
{
namespace _AENotificationObservable
{
class Subscribe
{
public static void Main1()
{
Console.WriteLine("Creating observable...");
AENotificationObservable events =
AENotificationObservable.Create("", "OPCLabs.KitEventServer.2", 1000);
Console.WriteLine("Subscribing...");
using (events.Subscribe(e => Console.WriteLine(
(e.Exception is null) ? (e.EventData?.Message ?? "") : e.Exception.GetBaseException().ToString())))
{
Console.WriteLine("Waiting for 10 seconds...");
Thread.Sleep(10*1000);
Console.WriteLine("Unsubscribing...");
}
Console.WriteLine("Waiting for 2 seconds...");
Thread.Sleep(2 * 1000);
}
}
}
}
Inheritance Hierarchy
Requirements
Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows
See Also