IDTSBuffer90.IsNull Method

  • 發行項

Checks whether a specified column is null.

命名空間: Microsoft.SqlServer.Dts.Pipeline.Wrapper
組件: Microsoft.SqlServer.DTSPipelineWrap (in microsoft.sqlserver.dtspipelinewrap.dll)

語法

'宣告
Sub IsNull ( _
    <InAttribute> hRow As Integer, _
    <InAttribute> hCol As Integer, _
    <InAttribute> <OutAttribute> ByRef pfNull As Boolean _
)

void IsNull (
    [InAttribute] int hRow,
    [InAttribute] int hCol,
    [InAttribute] out bool pfNull
)

void IsNull (
    [InAttribute] int hRow, 
    [InAttribute] int hCol, 
    [InAttribute] [OutAttribute] bool% pfNull
)

void IsNull (
    /** @attribute InAttribute() */ int hRow, 
    /** @attribute InAttribute() */ int hCol, 
    /** @attribute InAttribute() */ /** @attribute OutAttribute() */ /** @ref */ boolean pfNull
)

JScript 不支援以傳址方式傳遞值類型的引數。

參數

  • hRow
    The handle of the row.
  • hCol
    The handle of the column.
  • pfNull
    An out parameter that indicates whether the column value is null.

備註

This method checks whether the data stored in the buffer column is null or empty. Managed data flow component developers do not call this method, but instead use the IsNull method of the managed PipelineBuffer class.

執行緒安全性

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

開發平台

如需受支援的平台清單，請參閱＜安裝 SQL Server 2005 的硬體和軟體需求＞。

目標平台

如需受支援的平台清單，請參閱＜安裝 SQL Server 2005 的硬體和軟體需求＞。

請參閱

參考

IDTSBuffer90 Interface
IDTSBuffer90 Members
Microsoft.SqlServer.Dts.Pipeline.Wrapper Namespace