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PredicateExpression Class

Implementation of the IPredicateExpression interface.
Inheritance Hierarchy

Namespace:  SD.LLBLGen.Pro.ORMSupportClasses
Assembly:  SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.9.0.0 (5.9.0)
Syntax
[SerializableAttribute]
public class PredicateExpression : Predicate, 
	IPredicateExpression, IPredicate, IEnumerable, IEnumerable<IPredicateExpressionElement>

The PredicateExpression type exposes the following members.

Constructors
  NameDescription
Public methodPredicateExpression
CTor. This empty constructor is not recommended when adding this instance directly to another PredicateExpression.
Public methodPredicateExpression(IPredicate)
CTor.
Public methodPredicateExpression(IPredicate, PredicateExpressionOperator, IPredicate)
CTor
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Properties
  NameDescription
Public propertyCount
Gets the amount of predicate expression elements in this predicate expression. This is including all operators.
Public propertyDatabaseSpecificCreator
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.)
Public propertyInstanceType
The PredicateType of this instance. Used to determine the instance nature without a lot of casting.
(Inherited from Predicate.)
Public propertyItem
Gets the predicate expression element at the index specified
Public propertyNegate
Flag for setting the Predicate to negate itself, i.e. to add 'NOT' to its result.
(Inherited from Predicate.)
Public propertyObjectAlias
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.)
Public propertyParameters
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.)
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Methods
  NameDescription
Public methodAdd
Adds an IPredicate implementing object to the PredicateExpression. This can be a Predicate derived class or a PredicateExpression. If no object is present yet in the PredicateExpression, no operator is added, otherwise the object is added with an 'And'-operator.
Public methodAddWithAnd
Adds an IPredicate implementing object to the PredicateExpression with an 'And'-operator. The object added can be a Predicate derived class or a PredicateExpression. If no objects are present yet in the PredicateExpression, the operator is ignored.
Public methodAddWithOr
Adds an IPredicate implementing object to the PredicateExpression with an 'Or'-operator. The object added can be a Predicate derived class or a PredicateExpression. If no objects are present yet in the PredicateExpression, the operator is ignored.
Public methodClear
Clears this instance.
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetEnumerator
Returns an enumerator that iterates through a collection.
Public methodGetFrameworkElementsInPredicate
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.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodInterpretPredicate
Interprets this predicate on the passed in entity
(Overrides PredicateInterpretPredicate(IEntityCore).)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Protected methodReadAdditionalXmlData
Reads the additional a derived type has from the reader's XML data. The reader is positioned at the 'predicate' element.
(Overrides PredicateReadAdditionalXmlData(XmlReader).)
Public methodToQueryText
Implements the IPredicate ToQueryText method. Retrieves a ready to use text representation of the contained PredicateExpression.
(Overrides PredicateToQueryText.)
Public methodToQueryText(Boolean)
Retrieves a ready to use text representation of the contained Predicate.
(Overrides PredicateToQueryText(Boolean).)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
Protected methodWriteAdditionalXmlData
Writes the additional data a derived type has to the writer specified.
(Overrides PredicateWriteAdditionalXmlData(XmlWriter).)
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Extension Methods
  NameDescription
Public Extension MethodAnd
Returns a new PredicateExpression with contents: predicate AND toAdd
(Defined by PredicateExtensionMethods.)
Public Extension MethodAndNot
Returns a new PredicateExpression with contents: predicate AND NOT toAdd
(Defined by PredicateExtensionMethods.)
Public Extension MethodAs
Specifies an alias for the value returned by the predicate when the predicate is used in a projection. Equal to: Functions.IIF(predicate, true, false).As(alias)
(Defined by PredicateExtensionMethods.)
Public Extension MethodAsBooleanValue
Returns the predicate wrapped in a CASE WHEN (predicate) THEN 1 ELSE 0 END construct (as a function call expression) so the predicate can be used as a real boolean value in other places than the Where clause.
(Defined by PredicateExtensionMethods.)
Public Extension MethodIsEmpty
Determines whether the specified predicate or predicate expression is empty. A null passed in is also considered empty
(Defined by ORMClassExtensions.)
Public Extension MethodOr
Returns a new PredicateExpression with contents: predicate OR toAdd
(Defined by PredicateExtensionMethods.)
Public Extension MethodOrNot
Returns a new PredicateExpression with contents: predicate OR NOT toAdd
(Defined by PredicateExtensionMethods.)
Public Extension MethodToValue
Placeholder method which is used in a Select(lambda func) projection inside the lambda to specify the type of the result of the passed in predicate. Use this method only when specifying a predicate in the projection lambda.
(Defined by PredicateExtensionMethods.)
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Explicit Interface Implementations
  NameDescription
Explicit interface implementationPrivate methodIEnumerableIPredicateExpressionElementGetEnumerator
Returns an enumerator that iterates through the collection.
Explicit interface implementationPrivate methodIXmlSerializableGetSchema
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.)
Explicit interface implementationPrivate methodIXmlSerializableReadXml
Generates an object from its XML representation.
(Inherited from Predicate.)
Explicit interface implementationPrivate methodIXmlSerializableWriteXml
Converts an object into its XML representation.
(Inherited from Predicate.)
Explicit interface implementationPrivate methodIPredicateReadXml
Deserializes the predicate data on the xml reader into a predicate instance
(Inherited from Predicate.)
Explicit interface implementationPrivate methodIPredicateWriteXml
Serializes the predicate as xml to the writer specified.
(Inherited from Predicate.)
Explicit interface implementationPrivate methodIPredicateInterpretInterpret
Interprets the implementing class on the entity passed in.
(Inherited from Predicate.)
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See Also