IDTSBuffer90.IsNull Method

Checks whether a specified column is null.

Espacio de nombres: Microsoft.SqlServer.Dts.Pipeline.Wrapper
Ensamblado: Microsoft.SqlServer.DTSPipelineWrap (in microsoft.sqlserver.dtspipelinewrap.dll)

Sintaxis

'Declaración
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 no permite pasar argumentos de valor para referencia.

Parámetros

• hRow
  The handle of the row.

• hCol
  The handle of the column.

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

Notas

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.

Seguridad para subprocesos

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.

Plataformas

Plataformas de desarrollo

Para obtener una lista de las plataformas compatibles, vea Requisitos de hardware y software para instalar SQL Server 2005.

Plataformas de destino

Para obtener una lista de las plataformas compatibles, vea Requisitos de hardware y software para instalar SQL Server 2005.

Vea también

Referencia

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