IsNull Método

Checks whether a specified column is null.

Espacio de nombres:  Microsoft.SqlServer.Dts.Pipeline.Wrapper
Ensamblado:  Microsoft.SqlServer.DTSPipelineWrap (en Microsoft.SqlServer.DTSPipelineWrap.dll)

Sintaxis

'Declaración
Sub IsNull ( _
    hRow As Integer, _
    hCol As Integer, _
    <OutAttribute> ByRef pfNull As Boolean _
)
'Uso
Dim instance As IDTSBuffer100
Dim hRow As Integer
Dim hCol As Integer
Dim pfNull As Boolean

instance.IsNull(hRow, hCol, pfNull)

void IsNull(
    int hRow,
    int hCol,
    out bool pfNull
)

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

abstract IsNull : 
        hRow:int * 
        hCol:int * 
        pfNull:bool byref -> unit 

function IsNull(
    hRow : int, 
    hCol : int, 
    pfNull : boolean
)

Parámetros

• hRow
  Tipo: System. . :: . .Int32
  The handle of the row.

• hCol
  Tipo: System. . :: . .Int32
  The handle of the column.

• pfNull
  Tipo: System. . :: . .Boolean%
  An out parameter that indicates whether the column value is null.

Comentarios

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.

Vea también

Referencia

IDTSBuffer100 Interfaz

Espacio de nombres Microsoft.SqlServer.Dts.Pipeline.Wrapper