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ISqlExpressionFactory.IsNull(SqlExpression) Metodo

  • Riferimento

Definizione

Spazio dei nomi:
Microsoft.EntityFrameworkCore.Query
Assembly:
Microsoft.EntityFrameworkCore.Relational.dll
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v3.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v3.1.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v5.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v6.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v7.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v8.0.0

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

public 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
Public 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.

Si applica a