DbExpressionBuilder.TreatAs(DbExpression, TypeUsage) Method

Reference

Definition

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

Assembly:: System.Data.Entity.dll

Important

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Creates a new DbTreatExpression.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbTreatExpression ^ TreatAs(System::Data::Common::CommandTrees::DbExpression ^ argument, System::Data::Metadata::Edm::TypeUsage ^ treatType);

public static System.Data.Common.CommandTrees.DbTreatExpression TreatAs(this System.Data.Common.CommandTrees.DbExpression argument, System.Data.Metadata.Edm.TypeUsage treatType);

static member TreatAs : System.Data.Common.CommandTrees.DbExpression * System.Data.Metadata.Edm.TypeUsage -> System.Data.Common.CommandTrees.DbTreatExpression

<Extension()>
Public Function TreatAs (argument As DbExpression, treatType As TypeUsage) As DbTreatExpression

Parameters

argument: DbExpression

An expression that specifies the instance.

treatType: TypeUsage

Type metadata for the treat-as type.

Returns

DbTreatExpression

A new DbTreatExpression with the specified argument and type.

Exceptions

ArgumentNullException

argument or treatType is null.

ArgumentException

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

Remarks

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

Applies to

Продукт	Версии
.NET Framework	4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

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