# OpcDataChangeReceivedEventArgs Members

> Reference: Provides the event data for the DataChangeReceived, DataChangeReceived and DataChangeReceived events.

<dl class="api-definition">
<dt>Type</dt>
<dd><a href="./">OpcDataChangeReceivedEventArgs</a></dd>
<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>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

Inherits members from [EventArgs](https://learn.microsoft.com/dotnet/api/system.eventargs).

## Constructors

### OpcDataChangeReceivedEventArgs

Initializes a new instance of the [OpcDataChangeReceivedEventArgs](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcdatachangereceivedeventargs/) class using the `monitoredItem` and `item` specified.

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

```csharp
public OpcDataChangeReceivedEventArgs(
    OpcMonitoredItem monitoredItem,
    OpcDataChangeDataSetItem item)
```

</div>

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

```vbnet
Public Sub New(
    monitoredItem As OpcMonitoredItem,
    item As OpcDataChangeDataSetItem)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `monitoredItem` | [OpcMonitoredItem](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcmonitoreditem/) | The [OpcMonitoredItem](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcmonitoreditem/) through which the `item` has been received. |
| `item` | [OpcDataChangeDataSetItem](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatachangedatasetitem/) | The [OpcDataChangeDataSetItem](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatachangedatasetitem/) containing the data change received. |

**Exceptions**

| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `monitoredItem` or `item` is a null reference (Nothing in Visual Basic). |

## Properties

### Handled

Gets or sets a value that indicates whether the event handler has completely handled the event or whether the system should continue its own processing.

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

```csharp
public bool Handled { get; set; }
```

</div>

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

```vbnet
Public Property Handled As Boolean
```

</div>

**Property value**

[Boolean](https://learn.microsoft.com/dotnet/api/system.boolean)

The value true if the event has been completely handled; otherwise, the value false.

### Item

Gets the data change received.

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

```csharp
public OpcDataChangeDataSetItem Item { get; }
```

</div>

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

```vbnet
Public ReadOnly Property Item As OpcDataChangeDataSetItem
```

</div>

**Property value**

[OpcDataChangeDataSetItem](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatachangedatasetitem/)

An instance of the [OpcDataChangeDataSetItem](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatachangedatasetitem/) class containing the data change received.

### MonitoredItem

Gets the monitored item through which the data change has been received.

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

```csharp
public OpcMonitoredItem MonitoredItem { get; }
```

</div>

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

```vbnet
Public ReadOnly Property MonitoredItem As OpcMonitoredItem
```

</div>

**Property value**

[OpcMonitoredItem](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcmonitoreditem/)

The [OpcMonitoredItem](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcmonitoreditem/) through which the [Item](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcdatachangereceivedeventargs/members#item) has been received.