Méthode AdomdDataReader.IsDBNull
Returns a Boolean that contains a value indicating whether the column is set to null.
Espace de noms : Microsoft.AnalysisServices.AdomdClient
Assembly : Microsoft.AnalysisServices.AdomdClient (en Microsoft.AnalysisServices.AdomdClient.dll)
Syntaxe
'Déclaration
Public Function IsDBNull ( _
ordinal As Integer _
) As Boolean
'Utilisation
Dim instance As AdomdDataReader
Dim ordinal As Integer
Dim returnValue As Boolean
returnValue = instance.IsDBNull(ordinal)
public bool IsDBNull(
int ordinal
)
public:
virtual bool IsDBNull(
int ordinal
) sealed
abstract IsDBNull :
ordinal:int -> bool
override IsDBNull :
ordinal:int -> bool
public final function IsDBNull(
ordinal : int
) : boolean
Paramètres
- ordinal
Type : System.Int32
The zero-based ordinal position of the column to find.
Valeur de retour
Type : System.Boolean
A Boolean containing true if the column is set to nullune référence Null (Nothing dans Visual Basic); false otherwise.
Implémente
Notes
Call this method to check for nullune référence Null (Nothing dans Visual Basic) column values before calling the typed methods used to retrieve column values (for example, GetByte, GetChar, and so on), to avoid raising an error.