# OpcWriteNodesRequest Class

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

Represents the request of the Write service of OPC UA, which writes attributes of nodes.

## Syntax

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

```csharp
public class OpcWriteNodesRequest : OpcServiceRequest<OpcWriteNode, OpcWriteNodeCollection>
```

</div>

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

```vbnet
<CLSCompliant(False)>
Public Class OpcWriteNodesRequest
    Inherits OpcServiceRequest(Of OpcWriteNode, OpcWriteNodeCollection)
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → [OpcServiceRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcservicerequest/) → [OpcServiceRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcservicerequest-2/)&lt;[OpcWriteNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcwritenode/), [OpcWriteNodeCollection](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcwritenodecollection/)&gt; → **OpcWriteNodesRequest**

## Implements

<ul class="api-implements">
<li><a href="../opc.uafx.services.iopcservicerequest/">IOpcServiceRequest</a></li>
</ul>

## Constructors

| Name | Description |
|---|---|
| [OpcWriteNodesRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcwritenodesrequest/members#opcwritenodesrequest)<span class="api-meta">4 overloads</span> | Initializes a new instance of the OpcWriteNodesRequest class using the specified `commands` and a new header. |

## Methods

| Name | Description |
|---|---|
| [Validate](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcwritenodesrequest/members#validate)<span class="api-meta">protected · override · since v2.50</span> | Validates the request before a server processes it. |

Inherits members from [OpcServiceRequest&lt;OpcWriteNode, OpcWriteNodeCollection&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcservicerequest-2/members), [OpcServiceRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcservicerequest/members).

## Applies to

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