Método PipelineBuffer.IsNull
Checks to see if the data in a buffer column is null.
Namespace: Microsoft.SqlServer.Dts.Pipeline
Assembly: Microsoft.SqlServer.PipelineHost (em Microsoft.SqlServer.PipelineHost.dll)
Sintaxe
'Declaração
Public Function IsNull ( _
columnIndex As Integer _
) As Boolean
'Uso
Dim instance As PipelineBuffer
Dim columnIndex As Integer
Dim returnValue As Boolean
returnValue = instance.IsNull(columnIndex)
public bool IsNull(
int columnIndex
)
public:
bool IsNull(
int columnIndex
)
member IsNull :
columnIndex:int -> bool
public function IsNull(
columnIndex : int
) : boolean
Parâmetros
- columnIndex
Tipo: System.Int32
The index of the column in the buffer row.
Valor de retorno
Tipo: System.Boolean
true if the column contains nulluma referência nula (Nothing no Visual Basic); otherwise, false.
Comentários
It is recommended that you call the IsNull method prior to calling a data type accessor method, such as GetBoolean, because the PipelineBuffer will produce a ColumnIsNullException if the column is nulluma referência nula (Nothing no Visual Basic).