DbExpressionBuilder.IsOf(DbExpression, TypeUsage) Method

Reference

Definition

Namespace:: System.Data.Common.CommandTrees.ExpressionBuilder

Assembly:: System.Data.Entity.dll

Important

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Creates a new DbIsOfExpression that determines whether the given argument is of the specified type or a subtype.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbIsOfExpression ^ IsOf(System::Data::Common::CommandTrees::DbExpression ^ argument, System::Data::Metadata::Edm::TypeUsage ^ type);

public static System.Data.Common.CommandTrees.DbIsOfExpression IsOf (this System.Data.Common.CommandTrees.DbExpression argument, System.Data.Metadata.Edm.TypeUsage type);

static member IsOf : System.Data.Common.CommandTrees.DbExpression * System.Data.Metadata.Edm.TypeUsage -> System.Data.Common.CommandTrees.DbIsOfExpression

<Extension()>
Public Function IsOf (argument As DbExpression, type As TypeUsage) As DbIsOfExpression

Parameters

argument: DbExpression

An expression that specifies the instance.

type: TypeUsage

Type metadata that specifies the type that the instance's result type should be compared to.

Returns

DbIsOfExpression

A new DbIsOfExpression with the specified instance and type and DbExpressionKind IsOf.

Exceptions

ArgumentNullException

argument or type is null.

ArgumentException

type is not in the same type hierarchy as the result type of argument.

Remarks

DbIsOfExpression requires that argument has a polymorphic result type, and that type is a type from the same type hierarchy as that result type.

Applies to