Méthode ScriptBuffer.SetNull
Makes the value of the specified column nullune référence Null (Nothing dans Visual Basic).
Espace de noms : Microsoft.SqlServer.Dts.Pipeline
Assembly : Microsoft.SqlServer.TxScript (en Microsoft.SqlServer.TxScript.dll)
Syntaxe
'Déclaration
Protected Sub SetNull ( _
ColumnIndex As Integer _
)
'Utilisation
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
)
Paramètres
- ColumnIndex
Type : System.Int32
The index of the column.
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 SetNull method, because the derived classes contain a <ColumnX>_IsNull property for each column that you can use to specify a null value.
Exemples
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