# OpcBrowseNodeContext Class

> Reference: Describes a single node accessed by an OpcClient for browsing.

<dl class="api-definition">
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx.client">Opc.UaFx.Client</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">OpcBrowseNodeContext Members</a></dd>
<dt>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

Describes a single node accessed by an [OpcClient](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/) for browsing.

## Syntax

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

```csharp
public class OpcBrowseNodeContext : OpcNodeAccessContext
```

</div>

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

```vbnet
Public Class OpcBrowseNodeContext
    Inherits OpcNodeAccessContext
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → [OpcNodeAccessContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcnodeaccesscontext/) → **OpcBrowseNodeContext**

## Remarks

The OpcBrowseNodeContext is used whenever node browsing is performed using a specific [OpcClient](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/). An instance of this class does then provide the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) of the node to browse on, the [OpcClient](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/), the [OpcViewDescription](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcviewdescription/) of the view being browsed and a list of [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) objects identifying the different reference types to include for the browse operation.

Using this class or a scenario specific derivate of this class does simplify the API used for a specific node browse operation by reducing the amount of arguments (bound by the context object) they have to be passed.

## Properties

| Name | Description |
|---|---|
| [Attributes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#attributes)<span class="api-meta">since v2.9</span> | Gets the mask used to identify the different attributes to read after a whole layer (controlled by [Degree](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#degree)) of nodes has been browsed. |
| [Degree](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#degree) | Gets a value indicating the degree of relation to browse at once. |
| [Options](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#options)<span class="api-meta">since v2.8</span> | Gets the options used to include and exclude information offered by the server while browsing its address space. |
| [ReferenceTypeIds](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#referencetypeids) | Gets a read-only collection of [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) objects used to identify the different reference types to include while browsing the node tree. |
| [View](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#view) | Gets the [OpcViewDescription](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcviewdescription/) which identifies the view used then browsing the node tree. |

## Methods

| Name | Description |
|---|---|
| [OnAddressSpaceExpired](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#onaddressspaceexpired)<span class="api-meta">protected · virtual · since v2.11</span> | Raises the [AddressSpaceExpired](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#addressspaceexpired) event of the OpcBrowseNodeContext. |
| [Update](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#update)<span class="api-meta">protected · override · since v2.11</span> | Updates the context and raises the [AddressSpaceExpired](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#addressspaceexpired) event. |

## Events

| Name | Description |
|---|---|
| [AddressSpaceExpired](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcbrowsenodecontext/members#addressspaceexpired)<span class="api-meta">since v2.11</span> | Occurs in case the address space of the server the [Opc.UaFx.Client](https://www.traeger.de/en/docs/development/opcua/api/v2.59/namespaces/opc.uafx.client) is conntected to might or has been changed. |

Inherits members from [OpcNodeAccessContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcnodeaccesscontext/members).

## Applies to

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