通过

PipelineBuffer.IsNull Method

  • 项目

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

命名空间: Microsoft.SqlServer.Dts.Pipeline
程序集: Microsoft.SqlServer.PipelineHost (in microsoft.sqlserver.pipelinehost.dll)

语法

声明
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

参数

  • columnIndex
    The index of the column in the buffer row.

返回值

true if the column contains null; otherwise, false.

备注

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.

线程安全

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.

平台

开发平台

有关支持的平台列表，请参阅安装 SQL Server 2005 的硬件和软件要求。

目标平台

有关支持的平台列表，请参阅安装 SQL Server 2005 的硬件和软件要求。

请参阅

参考

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