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

Object Model

Syntax

Visual Basic (Usage)	Copy Code
Dim instance As DataValue

C#
[DataContractAttribute(Namespace="http://opcfoundation.org/UA/2008/02/Types.xsd", IsNamespaceSetExplicitly=true)] public class DataValue

[DataContractAttribute(Namespace="http://opcfoundation.org/UA/2008/02/Types.xsd", IsNamespaceSetExplicitly=true)]
public 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#	Copy Code
//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);

Copy Code

//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);

Visual Basic	Copy Code
'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);

Visual Basic

Copy Code

'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 7/8/10, Windows Server 2003/2008/2012/2015, .NET4.x