DAItemDescriptor Class Members

QuickOPC User's Guide and Reference

DAItemDescriptor Class Members

Fields Properties Methods Events Collapse All

OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace : DAItemDescriptor Class

The following tables list the members exposed by DAItemDescriptor.

Public Constructors

	Name	Description
	DAItemDescriptor Constructor	Overloaded. Initializes a new instance of the DAItemDescriptor class.

Public Fields

	Name	Description
	DefaultAccessPath	Default access path. An empty string.
	DefaultRequestedDataType	Default requested data type. Equals to OpcLabs.BaseLib.ComInterop.VarTypes.Empty.

Public Properties

	Name	Description
	AccessPath	Specifies the access path for the OPC item. The default is "" (an empty string).
	AliasName	When non-empty, specifies the name of the alias that will be used in place of this object. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	ArgumentString	The node descriptor in form of an argument string, i.e. a key=value pairs separated by semicolons. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	BrowsePath	Specifies the browse path for the OPC node. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	BrowsePathStartingNodeDescriptor	The starting node descriptor of the browse path. (Inherited from OpcLabs.EasyOpc.DataAccess.DANodeDescriptor)
	HasBrowsePath	Determines whether there is a non-null browse path in the descriptor. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	HasNodeId	Determines whether there is a non-null node ID in the descriptor. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	IsAliased	Determines whether this object is aliased. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	IsNull	Determines whether the node descriptor is null, i.e. specifies neither node ID nor a browse path. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	IsRoot	Determines whether this object describes a root of the address space. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	ItemId	Contains OPC item identifier (empty string for the root, null reference if unknown). (Inherited from OpcLabs.EasyOpc.DataAccess.DANodeDescriptor)
	NodeId	Contains node identifier (empty string for the root, null reference if unknown). (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	NodePath	Contains node path (empty string for the root, null reference if unknown). Only used with OPC XML. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	Null	A null item descriptor (contains a null node ID and a null browse path).
	RequestedDataType	Specifies the data type requested. Setting this property to OpcLabs.BaseLib.ComInterop.VarTypes.Empty means that the server's canonical data type should be used.

Public Methods

	Name	Description
	Clone	Overridden.
	Equals	Overloaded. Determines whether the specified DAItemDescriptor is equal to the current object.
	Flatten	Overloaded. Computes an equivalent node descriptor that is flattened. (Inherited from OpcLabs.EasyOpc.DataAccess.DANodeDescriptor)
	FromDANodeDescriptor	Converts a node descriptor a DAItemDescriptor object.
	FromDANodeElement	Converts a OpcLabs.EasyOpc.DataAccess.AddressSpace.DANodeElement to a DAItemDescriptor object.
	FromString	Converts a string containing an item Id to a DAItemDescriptor object.
	GetHashCode	Overridden. Serves as the default hash function. Serves as a hash function for a particular type.
	GetObjectData	Overridden.
	GetSchema	(Inherited from OpcLabs.BaseLib.Info)
	GetType	Gets the System.Type of the current instance. (Inherited from object)
	Match	Determines whether the node descriptor matches another node descriptor. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	ReadStringList	(Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	ReadXml	(Inherited from OpcLabs.BaseLib.Info)
	ToString	Returns a string that represents the current object.Returns a string that represents the current object.Returns a string describing the contents of the node descriptor. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	WriteStringList	(Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	WriteXml	(Inherited from OpcLabs.BaseLib.Info)

Protected Methods

	Name	Description
	DeserializeNodeDescriptorIfPresent	Infrastructure. Infrastructure. (Inherited from OpcLabs.EasyOpc.DataAccess.DANodeDescriptor)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from object)
	GetNodeIdArgumentName	Infrastructure. Infrastructure. (Inherited from OpcLabs.EasyOpc.DataAccess.DANodeDescriptor)
	MakeArgumentString	Overridden. Infrastructure. Infrastructure.
	MemberwiseClone	Creates a shallow copy of the current System.Object. (Inherited from object)
	OnPropertyChanged	Infrastructure. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)
	ReadXmlElement	Overridden. Infrastructure. Infrastructure. Infrastructure.
	SerializeNodeDescriptorIfNotNull	Infrastructure. Infrastructure. (Inherited from OpcLabs.EasyOpc.DataAccess.DANodeDescriptor)
	WriteXmlElement	Overridden. Infrastructure. Infrastructure. Infrastructure.

Public Events

	Name	Description
	PropertyChanged	This event is raised when a property is changed on a component. (Inherited from OpcLabs.EasyOpc.NodeDescriptor)

Public Operators

Equality	Determines whether the two objects are equal.
Implicit Type Conversion	Overloaded. Converts a string containing an item Id to a DAItemDescriptor object.
Inequality	Determines whether the two objects are not equal.

See Also

Reference

DAItemDescriptor Class
OpcLabs.EasyOpc.DataAccess Namespace

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