# OpcStateVariableNode 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">OpcStateVariableNode Members</a></dd>
</dl>

Defines a variable node which stores the current state of a state machine as a human readable name.

## Syntax

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

```csharp
public class OpcStateVariableNode : OpcTextVariableNode
```

</div>

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

```vbnet
<OpcNodeType(2755)>
Public Class OpcStateVariableNode
    Inherits OpcTextVariableNode
```

</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/) → [OpcVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcvariablenode/) → [OpcDataVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatavariablenode/) → [OpcTextVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opctextvariablenode/) → **OpcStateVariableNode**

## Implements

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

## Derived types

- [OpcFiniteStateVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatevariablenode/)
- [OpcTwoStateVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opctwostatevariablenode/)

## Constructors

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

## Properties

| Name | Description |
|---|---|
| [DefaultTypeDefinitionId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/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. |
| [EffectiveDisplayName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#effectivedisplayname) | Gets or sets a value which contains a human readable name for the current state of the state machine after taking the state of any sub state machines in account. |
| [EffectiveDisplayNameNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#effectivedisplaynamenode) | Gets the [OpcTextPropertyNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opctextpropertynode/) of the [EffectiveDisplayName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#effectivedisplayname) property. |
| [Number](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#number) | Gets or sets a numeric identifier which identifies the current state within the state machine. |
| [NumberNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#numbernode) | Gets the [OpcPropertyNode&lt;T&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode-1/) of the [Number](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#number) property. |
| [VariableId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#variableid) | Gets or sets a value which uniquely identifies the current state within the state machine. |
| [VariableIdNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#variableidnode) | Gets the [OpcPropertyNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode/) of the [VariableId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#variableid) property. |
| [VariableName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#variablename) | Gets or sets the name which uniquely identifies the current state within the state machine. |
| [VariableNameNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#variablenamenode) | Gets the [OpcNamePropertyNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamepropertynode/) of the [VariableName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatevariablenode/members#variablename) property. |

Inherits members from [OpcTextVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opctextvariablenode/members), [OpcVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcvariablenode/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 |