ProjectionExpression Class

Special expression class which is used in expression tree handling to represent a projection. During the tree processing, this node gains more and more information.

Inheritance Hierarchy

SystemObject
  System.Linq.ExpressionsExpression
    SD.LLBLGen.Pro.LinqSupportClasses.ExpressionClassesCommonExpression
      SD.LLBLGen.Pro.LinqSupportClasses.ExpressionClassesProjectionExpression

Namespace: SD.LLBLGen.Pro.LinqSupportClasses.ExpressionClasses
Assembly: SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.3.0.0 (5.3.0)

Syntax

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public class ProjectionExpression : CommonExpression, 
	IRelationPropagator

Public Class ProjectionExpression
	Inherits CommonExpression
	Implements IRelationPropagator

The ProjectionExpression type exposes the following members.

Constructors

	Name	Description
	ProjectionExpression(Type)	Initializes a new instance of the SetExpression class.
	ProjectionExpression(Type, LambdaExpression)	Initializes a new instance of the ProjectionExpression class.

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Properties

	Name	Description
	CanReduce	Indicates that the node can be reduced to a simpler node. If this returns true, Reduce() can be called to produce the reduced form. (Inherited from Expression.)
	NodeType	Gets the node type of this Expression. (Inherited from CommonExpression.)
	ProjectionLambda	Gets or sets the projection lambda, which is the source for the data gathered in this projection.
	ProjectionToUse	Gets or sets the projection to use for the query in LLBLGen Pro.
	RelationsToUse	Relations collection for the relations to traverse to be able to fulfill the projection. These relations are from the projection specification itself.
	Type	Gets the static type of the expression that this Expression represents. (Inherited from CommonExpression.)

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Methods

	Name	Description
	Accept	Dispatches to the specific visit method for this node type. For example, MethodCallExpression calls the VisitMethodCall(MethodCallExpression). (Inherited from Expression.)
	AddRelation(IDynamicRelation)	Adds the relation passed in to the RelationsToUse collection.
	AddRelation(IEntityRelation)	Adds the relation passed in to the RelationsToUse collection.
	AddRelations	Adds the relations passed in. Relations are added to this expression if a field in this projection is in a related entity and the relations contained inside this projection are required to access the field.
	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.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	Handle	Handles this instance using the specified handler. (Overrides CommonExpressionHandle(ScopeHandlerBase).)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	Reduce	Reduces this node to a simpler expression. If CanReduce returns true, this should return a valid expression. This method can return another node which itself must be reduced. (Inherited from Expression.)
	ReduceAndCheck	Reduces this node to a simpler expression. If CanReduce returns true, this should return a valid expression. This method can return another node which itself must be reduced. (Inherited from Expression.)
	ReduceExtensions	Reduces the expression to a known node type (that is not an Extension node) or just returns the expression if it is already a known type. (Inherited from Expression.)
	ToString	Returns a textual representation of the Expression. (Overrides ExpressionToString.)
	VisitChildren	Reduces the node and then calls the visitor delegate on the reduced expression. The method throws an exception if the node is not reducible. (Inherited from Expression.)

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Reference

SD.LLBLGen.Pro.LinqSupportClasses.ExpressionClasses Namespace