PredicateExpression Class

CTor. This empty constructor is not recommended when adding this instance directly to another PredicateExpression.

CTor.

CTor

Gets the amount of predicate expression elements in this predicate expression. This is including all operators.

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.

The PredicateType of this instance. Used to determine the instance nature without a lot of casting.

Gets the predicate expression element at the index specified

Flag for setting the Predicate to negate itself, i.e. to add 'NOT' to its result.

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).

The list of parameters created when the Predicate was translated to text usable in a query. Only valid after a succesful call to ToQueryText

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.

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.

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.

Clears this instance.

Determines whether the specified object is equal to the current object.

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.

Returns an enumerator that iterates through a collection.

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.

Serves as the default hash function.

Gets the Type of the current instance.

Interprets this predicate on the passed in entity

Creates a shallow copy of the current Object.

Reads the additional a derived type has from the reader's XML data. The reader is positioned at the 'predicate' element.

Implements the IPredicate ToQueryText method. Retrieves a ready to use text representation of the contained PredicateExpression.

Retrieves a ready to use text representation of the contained Predicate.

Returns a string that represents the current object.

Writes the additional data a derived type has to the writer specified.

Returns a new PredicateExpression with contents: predicate AND toAdd

Returns a new PredicateExpression with contents: predicate AND NOT toAdd

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)

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.

Determines whether the specified predicate or predicate expression is empty. A null passed in is also considered empty

Returns a new PredicateExpression with contents: predicate OR toAdd

Returns a new PredicateExpression with contents: predicate OR NOT toAdd

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.

Returns an enumerator that iterates through the collection.

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.

Generates an object from its XML representation.

Converts an object into its XML representation.

Deserializes the predicate data on the xml reader into a predicate instance

Serializes the predicate as xml to the writer specified.

Interprets the implementing class on the entity passed in.