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Метод SetNull

Makes the value of the specified column nullNothingnullptrunitпустая ссылка (Nothing в Visual Basic).

Пространство имен:  Microsoft.SqlServer.Dts.Pipeline
Сборка:  Microsoft.SqlServer.TxScript (в Microsoft.SqlServer.TxScript.dll)

Синтаксис

'Декларация
Protected Sub SetNull ( _
    ColumnIndex As Integer _
)
'Применение
Dim ColumnIndex As Integer

Me.SetNull(ColumnIndex)

protected void SetNull(
    int ColumnIndex
)

protected:
void SetNull(
    int ColumnIndex
)

member SetNull : 
        ColumnIndex:int -> unit 

protected function SetNull(
    ColumnIndex : int
)

Параметры

Замечания

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 SetNull method, because the derived classes contain a <ColumnX>_IsNull property for each column that you can use to specify a null value.

Примеры

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

    Public WriteOnly Property [city_IsNull] As Boolean
        Set
            SetNull(1)
        End Set

End Property