# OpcEventNode Class

<dl class="api-definition">
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx">Opc.UaFx</a></dd>
<dt>Assembly</dt>
<dd>Opc.UaFx.Advanced.dll</dd>
<dt>Package</dt>
<dd>Opc.UaFx.Advanced v2.59.0</dd>
<dt>Members</dt>
<dd><a href="./members">OpcEventNode Members</a></dd>
</dl>

Defines a generic base class for all general characteristics of an OPC UA Event.

## Syntax

<div class="api-signature" data-lang="csharp">

```csharp
[OpcNodeType(2041)]
public class OpcEventNode : OpcObjectNode
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
<OpcEventType(GetType(OpcEvent))>
<OpcNodeType(2041)>
Public Class OpcEventNode
    Inherits OpcObjectNode
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → [OpcNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/) → [OpcInstanceNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/) → [OpcObjectNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcobjectnode/) → **OpcEventNode**

## Implements

<ul class="api-implements">
<li><a href="../opc.uafx.iopcnode/">IOpcNode</a></li>
<li><a href="../opc.uafx.iopcnodeinfo/">IOpcNodeInfo</a></li>
</ul>

## Derived types

- [OpcConditionNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcconditionnode/)
- [OpcModelChangeEventNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodelchangeeventnode/)

## Constructors

| Name | Description |
|---|---|
| [OpcEventNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#opceventnode)<span class="api-meta">10 overloads</span> | Initializes a new instance of the OpcEventNode class accessible by the `name` specified. |

## Properties

| Name | Description |
|---|---|
| [DefaultTypeDefinitionId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#defaulttypedefinitionid)<span class="api-meta">protected · override</span> | Gets the default identifier which identifies the node that defines the underlying node type from that this [OpcInstanceNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/) has been created. |
| [EventId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#eventid) | Gets or sets a value generated by the server to uniquely identify a particular event notification. |
| [EventIdNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#eventidnode) | Gets the [OpcPropertyNode&lt;T&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode-1/) of the [EventId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#eventid) property. |
| [EventTypeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#eventtypeid) | Gets or sets the node identifier which describes the specific type of event. |
| [EventTypeIdNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#eventtypeidnode) | Gets the [OpcNodeIdPropertyNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeidpropertynode/) of the [EventTypeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#eventtypeid) property. |
| [Message](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#message) | Gets or sets a value which defines a human-readable and localizable text description of the event. |
| [MessageNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#messagenode) | Gets the [OpcTextPropertyNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opctextpropertynode/) of the [Message](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#message) property. |
| [ReceiveTime](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#receivetime) | Gets or sets the time the OPC UA server received the event from the underlying device of another server. |
| [ReceiveTimeNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#receivetimenode) | Gets the [OpcPropertyNode&lt;T&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode-1/) of the [ReceiveTime](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#receivetime) property. |
| [Severity](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#severity) | Gets or sets an indication of the urgency of the event. |
| [SeverityNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#severitynode) | Gets the [OpcPropertyNode&lt;T&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode-1/) of the [Severity](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#severity) property. |
| [SourceName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#sourcename) | Gets or sets a description of the source of the event. |
| [SourceNameNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#sourcenamenode) | Gets the [OpcPropertyNode&lt;T&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode-1/) of the [SourceName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#sourcename) property. |
| [SourceNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#sourcenodeid) | Gets or sets the node identifier which identifies the node that the event originated from. |
| [SourceNodeIdNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#sourcenodeidnode) | Gets the [OpcNodeIdPropertyNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeidpropertynode/) of the [SourceNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#sourcenodeid) property. |
| [Time](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#time) | Gets or sets the time the event occurred. |
| [TimeNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#timenode) | Gets the [OpcPropertyNode&lt;T&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode-1/) of the [Time](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#time) property. |

## Methods

| Name | Description |
|---|---|
| [CreateEvent](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#createevent) | Creates a new instance of the [OpcEvent](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcevent/) class which represents a snapshot of this OpcEventNode. |
| [CreateEventCore](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#createeventcore)<span class="api-meta">protected · virtual</span> | Creates a new instance of the [OpcEvent](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcevent/) class representing the specified `snapshot` of this OpcEventNode. |
| [InitializeDefaults](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#initializedefaults)<span class="api-meta">protected · override</span> | Initializes the default values used by the OpcEventNode. |
| [PrepareEventSnapshot](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#prepareeventsnapshot)<span class="api-meta">protected · virtual · since v2.22</span> | Prepares the OpcEventNode for a new [OpcEventNodeSnapshot](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnodesnapshot/). |
| [ReportEvent](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#reportevent) | Produces an event using the data represented by this OpcEventNode. |
| [ReportEventFrom](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#reporteventfrom) | Produces an event using the data represented by this OpcEventNode using the `source` as initiator of the event reported. |

Inherits members from [OpcObjectNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcobjectnode/members), [OpcInstanceNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/members), [OpcNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members).

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.5–v2.59 |