Reference

OpcDataItemNode Members

Type

OpcDataItemNode

Namespace

Opc.UaFx

Assembly

Opc.UaFx.Advanced.dll

Package

Opc.UaFx.Advanced v2.59.0

Inherits members from OpcVariableNode, OpcInstanceNode, OpcNode.

Constructors

OpcDataItemNode

18 overloads

Overload	Description
OpcDataItemNode(OpcName)	Initializes a new instance of the OpcDataItemNode class accessible by the name specified.
OpcDataItemNode(OpcName, object)	Initializes a new instance of the OpcDataItemNode class accessible by the name specified with the initial value given by value.
OpcDataItemNode(OpcName, OpcNodeId)	Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified.
OpcDataItemNode(OpcName, OpcNodeId, object)	Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified with the initial value given by value.
OpcDataItemNode(IOpcNode, OpcName)	Initializes a new instance of the OpcDataItemNode class accessible by the name specified as a child node of the parent node given.
OpcDataItemNode(IOpcNode, OpcName, object)	Initializes a new instance of the OpcDataItemNode class accessible by the name specified with the initial value defined by value as a child node of the parent node given.
OpcDataItemNode(IOpcNode, OpcName, OpcNodeId)	Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified as a child node of the parent node given.
OpcDataItemNode(IOpcNode, OpcName, OpcNodeId, object)	Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified with the initial value defined by value as a child node of the parent node given.
OpcDataItemNode(DataItemState)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class using the content as the instance to wrap.
OpcDataItemNode(DataItemState, OpcNodeModel)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class using the content as the instance to wrap.
OpcDataItemNode(OpcNodeModel, OpcName)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class accessible by the name specified.
OpcDataItemNode(OpcNodeModel, OpcName, object)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class accessible by the name specified with the initial value given by value.
OpcDataItemNode(OpcNodeModel, OpcName, OpcNodeId)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified.
OpcDataItemNode(OpcNodeModel, OpcName, OpcNodeId, object)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified with the initial value given by value.
OpcDataItemNode(OpcNodeModel, IOpcNode, OpcName)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class accessible by the name specified as a child node of the parent node given.
OpcDataItemNode(OpcNodeModel, IOpcNode, OpcName, object)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class accessible by the name specified with the initial value defined by value as a child node of the parent node given.
OpcDataItemNode(OpcNodeModel, IOpcNode, OpcName, OpcNodeId)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified as a child node of the parent node given.
OpcDataItemNode(OpcNodeModel, IOpcNode, OpcName, OpcNodeId, object)protected · since v2.50	Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified with the initial value defined by value as a child node of the parent node given.

OpcDataItemNode(OpcName)

Initializes a new instance of the OpcDataItemNode class accessible by the name specified.

public OpcDataItemNode(OpcName name)

Public Sub New(name As OpcName)

Parameters

Name	Type	Description
name	OpcName	The OpcName through that the new data item node can be accessed.

OpcDataItemNode(OpcName, object)

Initializes a new instance of the OpcDataItemNode class accessible by the name specified with the initial value given by value.

public OpcDataItemNode(OpcName name, object value)

Public Sub New(name As OpcName, value As Object)

Parameters

Name	Type	Description
name	OpcName	The OpcName through that the new data item node can be accessed.
value	Object	The initial value of the new data item node.

OpcDataItemNode(OpcName, OpcNodeId)

Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified.

public OpcDataItemNode(OpcName name, OpcNodeId id)

Public Sub New(name As OpcName, id As OpcNodeId)

Parameters

Name	Type	Description
name	OpcName	The OpcName through that the new data item node can be accessed.
id	OpcNodeId	The OpcNodeId through that the new data item node can be identified and accessed.

OpcDataItemNode(OpcName, OpcNodeId, object)

Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified with the initial value given by value.

public OpcDataItemNode(OpcName name, OpcNodeId id, object value)

Public Sub New(name As OpcName, id As OpcNodeId, value As Object)

Parameters

Name	Type	Description
name	OpcName	The OpcName through that the new data item node can be accessed.
id	OpcNodeId	The OpcNodeId through that the new data item node can be identified and accessed.
value	Object	The initial value of the new data item node.

OpcDataItemNode(IOpcNode, OpcName)

Initializes a new instance of the OpcDataItemNode class accessible by the name specified as a child node of the parent node given.

public OpcDataItemNode(IOpcNode parent, OpcName name)

Public Sub New(parent As IOpcNode, name As OpcName)

Parameters

Name	Type	Description
parent	IOpcNode	The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.
name	OpcName	The OpcName through that the new data item node can be accessed.

OpcDataItemNode(IOpcNode, OpcName, object)

Initializes a new instance of the OpcDataItemNode class accessible by the name specified with the initial value defined by value as a child node of the parent node given.

public OpcDataItemNode(IOpcNode parent, OpcName name, object value)

Public Sub New(parent As IOpcNode, name As OpcName, value As Object)

Parameters

Name	Type	Description
parent	IOpcNode	The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.
name	OpcName	The OpcName through that the new data item node can be accessed.
value	Object	The initial value of the new data item node.

OpcDataItemNode(IOpcNode, OpcName, OpcNodeId)

Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified as a child node of the parent node given.

public OpcDataItemNode(IOpcNode parent, OpcName name, OpcNodeId id)

Public Sub New(parent As IOpcNode, name As OpcName, id As OpcNodeId)

Parameters

Name	Type	Description
parent	IOpcNode	The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.
name	OpcName	The OpcName through that the new data item node can be accessed.
id	OpcNodeId	The OpcNodeId through that the new data item node can be identified and accessed.

OpcDataItemNode(IOpcNode, OpcName, OpcNodeId, object)

Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified with the initial value defined by value as a child node of the parent node given.

public OpcDataItemNode(
    IOpcNode parent,
    OpcName name,
    OpcNodeId id,
    object value)

Public Sub New(
    parent As IOpcNode,
    name As OpcName,
    id As OpcNodeId,
    value As Object)

Parameters

Name	Type	Description
parent	IOpcNode	The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.
name	OpcName	The OpcName through that the new data item node can be accessed.
id	OpcNodeId	The OpcNodeId through that the new data item node can be identified and accessed.
value	Object	The initial value of the new data item node.

OpcDataItemNode(DataItemState)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class using the content as the instance to wrap.

protected OpcDataItemNode(DataItemState content)

Protected Sub New(content As DataItemState)

Parameters

Name	Type	Description
content	DataItemState	The DataItemState to wrap.

Exceptions

Exception	Condition
ArgumentNullException	The content is a null reference (Nothing in Visual Basic).

OpcDataItemNode(DataItemState, OpcNodeModel)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class using the content as the instance to wrap.

protected OpcDataItemNode(DataItemState content, OpcNodeModel model)

Protected Sub New(content As DataItemState, model As OpcNodeModel)

Parameters

Name	Type	Description
content	DataItemState	The DataItemState to wrap.
model	OpcNodeModel	The OpcNodeModel which defines the modelling directives for the new node or a null reference (Nothing in Visual Basic) if there are no directives are to be applied to the node.

Exceptions

Exception	Condition
ArgumentNullException	The content is a null reference (Nothing in Visual Basic).

OpcDataItemNode(OpcNodeModel, OpcName)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class accessible by the name specified.

protected OpcDataItemNode(OpcNodeModel model, OpcName name)

Protected Sub New(model As OpcNodeModel, name As OpcName)

Parameters

Name	Type	Description
model	OpcNodeModel	The OpcNodeModel which defines the modelling directives for the new node or a null reference (Nothing in Visual Basic) if there are no directives are to be applied to the node.
name	OpcName	The OpcName through that the new data item node can be accessed.

OpcDataItemNode(OpcNodeModel, OpcName, object)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class accessible by the name specified with the initial value given by value.

protected OpcDataItemNode(OpcNodeModel model, OpcName name, object value)

Protected Sub New(model As OpcNodeModel, name As OpcName, value As Object)

Parameters

Name	Type	Description
model	OpcNodeModel	The OpcNodeModel which defines the modelling directives for the new node or a null reference (Nothing in Visual Basic) if there are no directives are to be applied to the node.
name	OpcName	The OpcName through that the new data item node can be accessed.
value	Object	The initial value of the new data item node.

OpcDataItemNode(OpcNodeModel, OpcName, OpcNodeId)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified.

protected OpcDataItemNode(OpcNodeModel model, OpcName name, OpcNodeId id)

Protected Sub New(model As OpcNodeModel, name As OpcName, id As OpcNodeId)

Parameters

Name	Type	Description
model	OpcNodeModel	The OpcNodeModel which defines the modelling directives for the new node or a null reference (Nothing in Visual Basic) if there are no directives are to be applied to the node.
name	OpcName	The OpcName through that the new data item node can be accessed.
id	OpcNodeId	The OpcNodeId through that the new data item node can be identified and accessed.

OpcDataItemNode(OpcNodeModel, OpcName, OpcNodeId, object)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified with the initial value given by value.

protected OpcDataItemNode(
    OpcNodeModel model,
    OpcName name,
    OpcNodeId id,
    object value)

Protected Sub New(
    model As OpcNodeModel,
    name As OpcName,
    id As OpcNodeId,
    value As Object)

Parameters

Name	Type	Description
model	OpcNodeModel	The OpcNodeModel which defines the modelling directives for the new node or a null reference (Nothing in Visual Basic) if there are no directives are to be applied to the node.
name	OpcName	The OpcName through that the new data item node can be accessed.
id	OpcNodeId	The OpcNodeId through that the new data item node can be identified and accessed.
value	Object	The initial value of the new data item node.

OpcDataItemNode(OpcNodeModel, IOpcNode, OpcName)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class accessible by the name specified as a child node of the parent node given.

protected OpcDataItemNode(OpcNodeModel model, IOpcNode parent, OpcName name)

Protected Sub New(model As OpcNodeModel, parent As IOpcNode, name As OpcName)

Parameters

Name	Type	Description
model	OpcNodeModel	The OpcNodeModel which defines the modelling directives for the new node or a null reference (Nothing in Visual Basic) if there are no directives are to be applied to the node.
parent	IOpcNode	The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.
name	OpcName	The OpcName through that the new data item node can be accessed.

OpcDataItemNode(OpcNodeModel, IOpcNode, OpcName, object)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class accessible by the name specified with the initial value defined by value as a child node of the parent node given.

protected OpcDataItemNode(
    OpcNodeModel model,
    IOpcNode parent,
    OpcName name,
    object value)

Protected Sub New(
    model As OpcNodeModel,
    parent As IOpcNode,
    name As OpcName,
    value As Object)

Parameters

Name	Type	Description
model	OpcNodeModel	The OpcNodeModel which defines the modelling directives for the new node or a null reference (Nothing in Visual Basic) if there are no directives are to be applied to the node.
parent	IOpcNode	The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.
name	OpcName	The OpcName through that the new data item node can be accessed.
value	Object	The initial value of the new data item node.

OpcDataItemNode(OpcNodeModel, IOpcNode, OpcName, OpcNodeId)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified as a child node of the parent node given.

protected OpcDataItemNode(
    OpcNodeModel model,
    IOpcNode parent,
    OpcName name,
    OpcNodeId id)

Protected Sub New(
    model As OpcNodeModel,
    parent As IOpcNode,
    name As OpcName,
    id As OpcNodeId)

Parameters

Name	Type	Description
model	OpcNodeModel	The OpcNodeModel which defines the modelling directives for the new node or a null reference (Nothing in Visual Basic) if there are no directives are to be applied to the node.
parent	IOpcNode	The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.
name	OpcName	The OpcName through that the new data item node can be accessed.
id	OpcNodeId	The OpcNodeId through that the new data item node can be identified and accessed.

OpcDataItemNode(OpcNodeModel, IOpcNode, OpcName, OpcNodeId, object)

protected · since v2.50

Initializes a new instance of the OpcDataItemNode class accessible by the name and id specified with the initial value defined by value as a child node of the parent node given.

protected OpcDataItemNode(
    OpcNodeModel model,
    IOpcNode parent,
    OpcName name,
    OpcNodeId id,
    object value)

Protected Sub New(
    model As OpcNodeModel,
    parent As IOpcNode,
    name As OpcName,
    id As OpcNodeId,
    value As Object)

Parameters

Name	Type	Description
model	OpcNodeModel	The OpcNodeModel which defines the modelling directives for the new node or a null reference (Nothing in Visual Basic) if there are no directives are to be applied to the node.
parent	IOpcNode	The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.
name	OpcName	The OpcName through that the new data item node can be accessed.
id	OpcNodeId	The OpcNodeId through that the new data item node can be identified and accessed.
value	Object	The initial value of the new data item node.

Properties

DefaultTypeDefinitionId

protected · override

Gets the default identifier which identifies the node that defines the underlying node type from that this OpcInstanceNode has been created.

protected override OpcNodeId DefaultTypeDefinitionId { get; }

Protected Overrides ReadOnly Property DefaultTypeDefinitionId As OpcNodeId

Property value

OpcNodeId

The OpcNodeId of the type node from that this OpcInstanceNode has been created from. These type node defines the typical structure of an instance node of its type definition. If there exists no specific type definition node a null reference (Nothing in Visual Basic).

Overrides

DefaultTypeDefinitionId

Definition

Gets or sets a vendor-specific, human readable string that specifies how the value of this data item is calculated.

public string Definition { get; set; }

Public Property Definition As String

Property value

String

A non-localized value which will often contain an equation that can be parsed by certain clients.

DefinitionNode

Gets the OpcPropertyNode<T> of the Definition property.

public OpcPropertyNode<string> DefinitionNode { get; }

Public ReadOnly Property DefinitionNode As OpcPropertyNode(Of String)

Property value

OpcPropertyNode<String>

An instance of the OpcPropertyNode<T> class.

ValuePrecision

Gets or sets a value which specifies the maximum precision that the server can maintain for the item based on restrictions in the target environment.

public double ValuePrecision { get; set; }

Public Property ValuePrecision As Double

Property value

Double

The maximum precision that the server can maintain for the item.

Remarks

The property can be used for the following OpcDataTypes:

• For Float and Double values it specifies the number of digits after the decimal place.
• For DateTime values it indicates the minimum time difference in nanoseconds. For example, a ValuePrecision of 20 000 000 defines a precision of 20 ms.

The value is an approximation that is intended to provide guidance to a client. A server is expected to silently round any value with more precision that it supports. This implies that a client may encounter cases where the value read back from a server differs from the value that it wrote to the server. This difference should be no more than the difference suggested by this property.

ValuePrecisionNode

Gets the OpcPropertyNode<T> of the ValuePrecision property.

public OpcPropertyNode<double> ValuePrecisionNode { get; }

Public ReadOnly Property ValuePrecisionNode As OpcPropertyNode(Of Double)

Property value

OpcPropertyNode<Double>

An instance of the OpcPropertyNode<T> class.

Methods

InitializeDefaults

protected · override

Initializes the default values used by the OpcDataItemNode.

protected override void InitializeDefaults()

Protected Overrides Sub InitializeDefaults()

Overrides

InitializeDefaults

Remarks

This method is used to ensure the availability of appropriate node specific default values. For more information like when this method is to be overwritten see InitializeDefaults.