IDTSBuffer90.IsNull Method

Checks whether a specified column is null.

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

Syntaxe

'Déclaration
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 ne prend pas en charge le passage d'arguments de type valeur par référence.

Paramètres

• hRow
  The handle of the row.

• hCol
  The handle of the column.

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

Notes

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.

Sécurité des threads

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.

Plateformes

Plateformes de développement

Pour obtenir la liste des plateformes prises en charge, consultez Configuration matérielle et logicielle requise pour l'installation de SQL Server 2005.

Plateformes cibles

Pour obtenir la liste des plateformes prises en charge, consultez Configuration matérielle et logicielle requise pour l'installation de SQL Server 2005.

Voir aussi

Référence

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