• Article

Méthode 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

Valeur de retour

Type : System. . :: . .Boolean
A Boolean containing true if the column is set to nullNothingnullptrunitune référence Null (Nothing dans Visual Basic); false otherwise.

Implémente

IDataRecord. . :: . .IsDBNull(Int32)

Notes

Call this method to check for null Nothing nullptr unit une 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.