FieldCompareNullPredicate Class

Implementation of a Field Compare NULL expression using the following format: IEntityField(Core) IS NULL (f.e. Foo IS NULL).

Inheritance Hierarchy

SystemObject
SD.LLBLGen.Pro.ORMSupportClassesPredicate
SD.LLBLGen.Pro.ORMSupportClassesFieldCompareNullPredicate

Namespace: SD.LLBLGen.Pro.ORMSupportClasses
Assembly: SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.7.0.0 (5.7.0)

Syntax

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[SerializableAttribute]
public class FieldCompareNullPredicate : Predicate

<SerializableAttribute>
Public Class FieldCompareNullPredicate
	Inherits Predicate

The FieldCompareNullPredicate type exposes the following members.

Constructors

	Name	Description
	FieldCompareNullPredicate	CTor
	FieldCompareNullPredicate(IEntityField)	CTor. Creates the Field IS NULL predicate. (SelfServicing version)
	FieldCompareNullPredicate(IEntityField, Boolean)	CTor. Creates the Field IS NULL predicate.
	FieldCompareNullPredicate(IEntityField, String)	CTor. Creates the Field IS NULL predicate. (SelfServicing version)
	FieldCompareNullPredicate(IEntityFieldCore, IFieldPersistenceInfo)	CTor. Creates the Field IS NULL predicate.
	FieldCompareNullPredicate(IEntityField, String, Boolean)	CTor. Creates the Field IS NULL predicate.
	FieldCompareNullPredicate(IEntityFieldCore, IFieldPersistenceInfo, Boolean)	CTor. Creates the Field IS NULL predicate.
	FieldCompareNullPredicate(IEntityFieldCore, IFieldPersistenceInfo, String)	CTor. Creates the Field IS NULL predicate.
	FieldCompareNullPredicate(IEntityFieldCore, IFieldPersistenceInfo, String, Boolean)	CTor. Creates the Field IS NULL predicate.

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Properties

	Name	Description
	DatabaseSpecificCreator	Object which will be used to create valid parameter objects, field names, including prefix/postfix characters, and conversion routines, and field names, including prefix/postfix characters. Uses the strategy pattern so the generic code can work with more than one target database. (Inherited from Predicate.)
	Field	Field used in the comparison expression (SelfServicing).
	FieldCore	Field used in the comparison expression (IEntityFieldCore).
	InstanceType	The PredicateType of this instance. Used to determine the instance nature without a lot of casting. (Inherited from Predicate.)
	Negate	Flag for setting the Predicate to negate itself, i.e. to add 'NOT' to its result. (Inherited from Predicate.)
	ObjectAlias	Alias for the object the field belongs to. Used to identify which entity to use when the entity is present multiple times in a relation collection. Alias has to match an alias specified in the relation collection or should be left empty if no alias is specified (or no relation collection is used). (Inherited from Predicate.)
	Parameters	The list of parameters created when the Predicate was translated to text usable in a query. Only valid after a succesful call to ToQueryText (Inherited from Predicate.)
	PersistenceInfo	Gets / sets persistenceInfo for field

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Methods

	Name	Description
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetFrameworkElementsInPredicate	Gets a list of all framework objects (fields, expression objects etc.) which are located in this IPredicate instance. E.g. a FieldCompareValuePredicate will return a list with 1 IEntityFieldCore instance: the field to compare. If no framework elements are present in the predicate, the base implementation is used, which returns an empty list. This routine is used to gather information for Linq queries. (Overrides PredicateGetFrameworkElementsInPredicate.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	InterpretPredicate	Interprets this predicate on the passed in entity (Overrides PredicateInterpretPredicate(IEntityCore).)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ReadAdditionalXmlData	Reads the additional a derived type has from the reader's XML data. The reader is positioned at the 'predicate' element. (Overrides PredicateReadAdditionalXmlData(XmlReader).)
	ToQueryText	Implements the IPredicate ToQueryText method. Retrieves a ready to use text representation of the contained Predicate. (Overrides PredicateToQueryText.)
	ToQueryText(Boolean)	Retrieves a ready to use text representation of the contained Predicate. (Overrides PredicateToQueryText(Boolean).)
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	WriteAdditionalXmlData	Writes the additional data a derived type has to the writer specified. (Overrides PredicateWriteAdditionalXmlData(XmlWriter).)

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Explicit Interface Implementations

	Name	Description
	IXmlSerializableGetSchema	This method is reserved and should not be used. When implementing the IXmlSerializable interface, you should return null (Nothing in Visual Basic) from this method, and instead, if specifying a custom schema is required, apply the XmlSchemaProviderAttribute to the class. (Inherited from Predicate.)
	IXmlSerializableReadXml	Generates an object from its XML representation. (Inherited from Predicate.)
	IXmlSerializableWriteXml	Converts an object into its XML representation. (Inherited from Predicate.)
	IPredicateReadXml	Deserializes the predicate data on the xml reader into a predicate instance (Inherited from Predicate.)
	IPredicateWriteXml	Serializes the predicate as xml to the writer specified. (Inherited from Predicate.)
	IPredicateInterpretInterpret	Interprets the implementing class on the entity passed in. (Inherited from Predicate.)

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Reference

SD.LLBLGen.Pro.ORMSupportClasses Namespace