SqlExpressionFactory.IsNull(SqlExpression) Metodo

Definizione

Spazio dei nomi:

Microsoft.EntityFrameworkCore.Query

Assembly:

Microsoft.EntityFrameworkCore.Relational.dll

Pacchetto:

Microsoft.EntityFrameworkCore.Relational v8.0.0

Crea un nuovo SqlUnaryExpression oggetto che rappresenta l'uguaglianza con Null.

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlUnaryExpression IsNull (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression operand);

abstract member IsNull : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlUnaryExpression
override this.IsNull : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlUnaryExpression

Public Overridable Function IsNull (operand As SqlExpression) As SqlUnaryExpression

Parametri

operand

SqlExpression

Oggetto SqlExpression da confrontare con null.

Restituisce

SqlUnaryExpression

Espressione che rappresenta un costrutto IS NULL in un albero SQL.

Implementazioni

IsNull(SqlExpression)