PipelineBuffer.IsNull Method

Статья
12/15/2008

Checks to see if the data in a buffer column is null.

Пространство имен: Microsoft.SqlServer.Dts.Pipeline
Сборка: Microsoft.SqlServer.PipelineHost (in microsoft.sqlserver.pipelinehost.dll)

Синтаксис

'Декларация
Public Function IsNull ( _
    columnIndex As Integer _
) As Boolean

public bool IsNull (
    int columnIndex
)

public:
bool IsNull (
    int columnIndex
)

public boolean IsNull (
    int columnIndex
)

public function IsNull (
    columnIndex : int
) : boolean

Параметры

columnIndex
The index of the column in the buffer row.

Возвращаемое значение

true if the column contains null; otherwise, false.

Замечания

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 null.

Синхронизация потоков

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.

Платформы

Платформы разработки

Список поддерживаемых платформ см. в разделе Hardware and Software Requirements for Installing SQL Server 2005.

Целевые платформы