EntityShaperExpression Class

Reference

Definition

Namespace:: Microsoft.EntityFrameworkCore.Query

Assembly:: Microsoft.EntityFrameworkCore.dll

Package:: Microsoft.EntityFrameworkCore v3.0.0

Package:: Microsoft.EntityFrameworkCore v3.1.0

Package:: Microsoft.EntityFrameworkCore v5.0.0

Package:: Microsoft.EntityFrameworkCore v6.0.0

Package:: Microsoft.EntityFrameworkCore v7.0.0

Important

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An expression that represents creation of an entity instance in ShaperExpression.

This type is typically used by database providers (and other extensions). It is generally not used in application code.

public class EntityShaperExpression : System.Linq.Expressions.Expression, Microsoft.EntityFrameworkCore.Query.IPrintableExpression

type EntityShaperExpression = class
    inherit Expression
    interface IPrintableExpression

Public Class EntityShaperExpression
Inherits Expression
Implements IPrintableExpression

Inheritance: Expression
EntityShaperExpression

Derived: Microsoft.EntityFrameworkCore.Query.RelationalEntityShaperExpression

Implements: IPrintableExpression

Remarks

See Implementation of database providers and extensions and How EF Core queries work for more information and examples.

Constructors

EntityShaperExpression(IEntityType, Expression, Boolean, LambdaExpression)	Creates a new instance of the EntityShaperExpression class.
EntityShaperExpression(IEntityType, Expression, Boolean)	Creates a new instance of the EntityShaperExpression class.

Properties

EntityType	The entity type being shaped.
IsNullable	A value indicating whether this entity instance can be null.
MaterializationCondition	The materilization condition to use for shaping this entity.
NodeType	Gets the node type of this Expression.
Type	Gets the static type of the expression that this Expression represents.
ValueBufferExpression	The expression representing a ValueBuffer to get values from that are used to create the entity instance.

Methods

CreateUnableToDiscriminateExceptionExpression(IEntityType, Expression)	Creates an expression to throw an exception when unable to determine entity type to materialize based on discriminator value.
GenerateMaterializationCondition(IEntityType, Boolean)	Creates an expression of Func<T,TResult> to determine which entity type to materialize.
MakeNullable(Boolean)	Assigns nullability for this shaper, indicating whether it can shape null entity instances or not.
MarkAsNullable()	Obsolete. Marks this shaper as nullable, indicating that it can shape null entity instances.
Print(ExpressionPrinter)
Update(Expression)	Creates a new expression that is like this one, but using the supplied children. If all of the children are the same, it will return this expression.
VisitChildren(ExpressionVisitor)	Reduces the node and then calls the visitor delegate on the reduced expression. The method throws an exception if the node is not reducible.
WithEntityType(IEntityType)	Changes the entity type being shaped by this entity shaper.

Explicit Interface Implementations

IPrintableExpression.Print(ExpressionPrinter)

Creates a printable string representation of the given expression using ExpressionPrinter.

Applies to

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