DataValue Class

A class that stores the value of variable with an optional status code and timestamps.

Object Model

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<DataContractAttribute("http://opcfoundation.org/UA/2008/02/Types.xsd")>
Public Class DataValue

'Usage
 
Dim instance As DataValue

[DataContract("http://opcfoundation.org/UA/2008/02/Types.xsd")]
public class DataValue

[DataContract("http://opcfoundation.org/UA/2008/02/Types.xsd")]
public ref class DataValue

Remarks

This object relates to the OPC UA Specifications Part 6: Mappings, section 6.2.2.16 titled DataValue.

This object is essentially a place-holder for the following:

Variant
StatusCode
System.DateTime for the Servers Timestamp

Example

C#
Visual Basic

//define a new DataValue first where:
//  (a) the value is a string, which is "abc123"
//  (b) the statuscode is 0 (zero)
//  (c) the timestamp is 'now'
DataValue dv = new DataValue(new Variant("abc123"), new StatusCode(0), DateTime.Now);

'define a new DataValue first where:
'  (a) the value is a string, which is "abc123"
'  (b) the statuscode is 0 (zero)
'  (c) the timestamp is 'now'
Dim dv As DataValue = New DataValue(New Variant("abc123"), New StatusCode(0), DateTime.Now);

Inheritance Hierarchy

System.Object
Opc.Ua.DataValue

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DataValue Members
Opc.Ua Namespace
Variant Structure
StatusCode Property