DbExpressionBuilder.IsNull(DbExpression) Method

Reference

Definition

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

Assembly:: System.Data.Entity.dll

Important

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Creates a new DbIsNullExpression that determines whether the specified argument is null.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbIsNullExpression ^ IsNull(System::Data::Common::CommandTrees::DbExpression ^ argument);

public static System.Data.Common.CommandTrees.DbIsNullExpression IsNull(this System.Data.Common.CommandTrees.DbExpression argument);

static member IsNull : System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbIsNullExpression

<Extension()>
Public Function IsNull (argument As DbExpression) As DbIsNullExpression

Parameters

argument: DbExpression

An expression that specifies the argument.

Returns

DbIsNullExpression

A new DbIsNullExpression with the specified argument.

Exceptions

ArgumentNullException

argument is null.

ArgumentException

argument has a collection result type.

Applies to

ผลิตภัณฑ์	เวอร์ชัน
.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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