UAFilterElements Class Members

The following tables list the members exposed by UAFilterElements.

Public Methods

	Name	Description
	And	Overloaded. TRUE if operand[0] and operand[1] are TRUE. Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to a Boolean. [1]: Any operand that resolves to a Boolean. If any operand cannot be resolved to a Boolean it is considered a NULL. The value of this enum member is 11.
	Attribute	Overloaded. Creates a new attribute operand. The created operand. Default namespace used when parsing the browse path string is "http://opcfoundation.org/UA/".
	Between	Overloaded. TRUE if operand[0] is greater or equal to operand[1] and less than or equal to operand[2]. Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to an ordered value. [1]: Any operand that resolves to an ordered value. [2]: Any operand that resolves to an ordered value. If the operands are of different types, the system shall perform any implicit conversion to match all operands to a common type. If no implicit conversion is available and the operands are of different types, the particular result is FALSE. The value of this enum member is 9.
	BitwiseAnd	Overloaded. The result is an integer which matches the size of the largest operand and contains a bitwise And operation of the two operands where both have been converted to the same size (largest of the two operands). Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to an integer. [1]: Any operand that resolves to an integer. If any operand cannot be resolved to an integer it is considered a NULL. The value of this enum member is 17.
	BitwiseOr	Overloaded. The result is an integer which matches the size of the largest operand and contains a bitwise Or operation of the two operands where both have been converted to the same size (largest of the two operands). Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to an integer. [1]: Any operand that resolves to an integer. If any operand cannot be resolved to an integer it is considered a NULL. The value of this enum member is 18.
	Cast	Overloaded. Converts operand[0] to a value with a data type with a NodeId identified by operand[1]. Remarks: The following restrictions apply to the operands: [0]: Any operand. [1]: Any operand that resolves to a NodeId or ExpandedNodeId where the Node is of the NodeClass DataType. If there is any error in conversion or in any of the parameters then the Cast Operation evaluates to a NULL. The value of this enum member is 13.
	Equals	Overloaded. TRUE if operand[0] is equal to operand[1]. Remarks: If the operands are of different types, the system shall perform any implicit conversion to a common type. This operator resolves to FALSE if no implicit conversion is available and the operands are of different types. This operator returns FALSE if the implicit conversion fails. The value of this enum member is 1.
	GetHashCode	Serves as the default hash function. (Inherited from object)
	GetType	Gets the System.Type of the current instance. (Inherited from object)
	GreaterThan	Overloaded. TRUE if operand[0] is greater than operand[1]. Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to an ordered value. [1]: Any operand that resolves to an ordered value. The same conversion rules as defined for Equals apply. The value of this enum member is 3.
	GreaterThanOrEqual	Overloaded. TRUE if operand[0] is greater than or equal to operand[1]. Remarks: The same conversion rules and restrictions as defined for GreaterThan apply. The value of this enum member is 5.
	InList	Overloaded. TRUE if operand[0] is equal to one or more of the remaining operands. Remarks: The Equals Operator is evaluated for operand[0] and each remaining operand in the list. If any Equals evaluation is TRUE, InList returns TRUE. The value of this enum member is 10.
	InView	Overloaded. TRUE if the target Node is contained in the View defined by operand[0]. Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to a NodeId that identifies a View Node. If operand[0] does not resolve to a NodeId that identifies a View Node, this operation shall always be False. The value of this enum member is 14.
	IsNull	TRUE if operand[0] is a null value. The value of this enum member is 2.
	LessThan	Overloaded. TRUE if operand[0] is less than operand[1]. Remarks: The same conversion rules and restrictions as defined for GreaterThan apply. The value of this enum member is 4.
	LessThanOrEqual	Overloaded. TRUE if operand[0] is less than or equal to operand[1]. Remarks: The same conversion rules and restrictions as defined for GreaterThan apply. The value of this enum member is 6.
	Like	Overloaded. TRUE if operand[0] matches a pattern defined by operand[1]. Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to a String. [1]: Any operand that resolves to a String. This operator resolves to FALSE if no operand can be resolved to a string. The value of this enum member is 7.
	Literal	Overloaded. Creates a new literal operand, with given value.
	Not	TRUE if operand[0] is FALSE. Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to a Boolean. If the operand cannot be resolved to a Boolean, the result is a NULL. The value of this enum member is 8.
	OfType	Overloaded. TRUE if the target Node is of type operand[0] or of a subtype of operand[0]. Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to a NodeId that identifies an ObjectType or VariableType Node. If operand[0]oes not resolve to a NodeId that identifies an ObjectType or VariableType Node, this operation shall always be False. The value of this enum member is 15.
	Or	Overloaded. TRUE if operand[0] or operand[1] are TRUE. Remarks: The following restrictions apply to the operands: [0]: Any operand that resolves to a Boolean. [1]: Any operand that resolves to a Boolean. If any operand cannot be resolved to a Boolean it is considered a NULL. The value of this enum member is 12.
	RelatedTo	Overloaded. TRUE if the target Node is of type Operand[0] and is related to a NodeId of the type defined in Operand[1] by the Reference type defined in Operand[2]. Remarks: Operand[0] or Operand[1] can also point to an element Reference where the referred to element is another RelatedTo operator. This allows chaining of relationships (e.g. A is related to B is related to C), where the relationship is defined by the ReferenceType defined in Operand[2]. In this case, the referred to element returns a list of NodeIds instead of TRUE or FALSE. In this case if any errors occur or any of the operands cannot be resolved to an appropriate value, the result of the chained relationship is an empty list of nodes. Operand[3] defines the number of hops for which the relationship should be followed. If Operand[3] is 1, then objects shall be directly related. If a hop is greater than 1, then a NodeId of the type described in Operand[1] is checked for at the depth specified by the hop. In this case, the type of the intermediate Node is undefined, and only the Reference type used to reach the end Node is defined. If the requested number of hops cannot be followed, then the result is FALSE, i.e., an empty Node list. If Operand[3] is 0, the relationship is followed to its logical end in a forward direction and each Node is checked to be of the type specified in Operand[1]. If any Node satisfies this criterion, then the result is TRUE, i.e., the NodeId is included in the sub-list. Operand [4] defines if Operands [0] and [1] should include support for subtypes of the types defined by these operands. A TRUE indicates support for subtypes. Operand [5] defines if Operand [2] should include support for subtypes of the reference type. A TRUE indicates support for subtypes. The following restrictions apply to the operands: [0]: Any operand that resolves to a NodeId or ExpandedNodeId that identifies an ObjectType or VariableType Node or a reference to another element which is a RelatedTo operator. [1]: Any operand that resolves to a NodeId or ExpandedNodeId that identifies an ObjectType or VariableType Node or a reference to another element which is a RelatedTo operator. [2]: Any operand that resolves to a NodeId that identifies a ReferenceType Node. [3]: Any operand that resolves to a value implicitly convertible to Uint32. [4]: Any operand that resolves to a value implicitly convertible to a boolean; if this operand does not resolve to a Boolean, then a value of FALSE is used. [5]: Any operand that resolves to a value implicitly convertible to a boolean; if this operand does not resolve to a Boolean, then a value of FALSE is used. If none of the operands [0], [1], [2], [3] resolves to an appropriate value then the result of this operation shall always be False (or an Empty set in the case of a nested RelatedTo operand). The value of this enum member is 16.
	SimpleAttribute	Overloaded. Creates a new simple attribute operand. The created operand. Default namespace used when parsing the browse path string is "http://opcfoundation.org/UA/".
	ToString	Returns a string that represents the current object. (Inherited from object)

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Protected Methods

	Name	Description
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from object)
	MemberwiseClone	Creates a shallow copy of the current System.Object. (Inherited from object)

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Extension Methods

	Name	Description
	SetState<TNode>	Sets the arbitrary object associated with the node.

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Reference

UAFilterElements Class
OpcLabs.EasyOpc.UA.Filtering Namespace