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ScriptBuffer.IsNull Method

Returns a value that indicates whether the value of the specified column is null.

Espace de noms: Microsoft.SqlServer.Dts.Pipeline
Assembly: Microsoft.SqlServer.TxScript (in microsoft.sqlserver.txscript.dll)

Syntaxe

'Déclaration
Protected Function IsNull ( _
    ColumnIndex As Integer _
) As Boolean
protected bool IsNull (
    int ColumnIndex
)
protected:
bool IsNull (
    int ColumnIndex
)
protected boolean IsNull (
    int ColumnIndex
)
protected function IsNull (
    ColumnIndex : int
) : boolean

Paramètres

  • ColumnIndex
    The index of the column.

Valeur de retour

true if the value of the specified column is null; otherwise, false.

Notes

The Script component developer does not use the ScriptBuffer class directly, but indirectly, through the derived classes in the BufferWrapper project item that represent the component's input and outputs.

The developer does not have to use the IsNull method, because the derived classes contain a <ColumnX>_IsNull property for each column.

Exemple

The following sample code from the autogenerated BufferWrapper project item demonstrates how the Script component uses the IsNull method.

    Public Property [city_IsNull] As Boolean
        Get
            Return IsNull(1)
        End Get
        Set
            SetNull(1)
        End Set
    End Property

Sécurité des threads

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Plateformes

Plateformes de développement

Pour obtenir la liste des plateformes prises en charge, consultez Configuration matérielle et logicielle requise pour l'installation de SQL Server 2005.

Plateformes cibles

Pour obtenir la liste des plateformes prises en charge, consultez Configuration matérielle et logicielle requise pour l'installation de SQL Server 2005.

Voir aussi

Référence

ScriptBuffer Class
ScriptBuffer Members
Microsoft.SqlServer.Dts.Pipeline Namespace