IDTSBuffer90.IsNull Method

Artykuł
12/03/2008

Checks whether a specified column is null.

Namespace: Microsoft.SqlServer.Dts.Pipeline.Wrapper
Assembly: Microsoft.SqlServer.DTSPipelineWrap (in microsoft.sqlserver.dtspipelinewrap.dll)

Syntax

'Declaration
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 does not support passing value-type arguments by reference.

Parameters

hRow
The handle of the row.

hCol
The handle of the column.

pfNull
An out parameter that indicates whether the column value is null.

Remarks

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.

Thread Safety

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.

Platforms

Development Platforms

For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.

Target Platforms

For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.

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