Partager via

  • Article

Méthode IsDBNull

Returns a Boolean that contains a value indicating whether the column is set to null.

Espace de noms :  Microsoft.AnalysisServices.AdomdServer
Assembly :  msmgdsrv (en msmgdsrv.dll)

Syntaxe

'Déclaration
Public Function IsDBNull ( _
    i As Integer _
) As Boolean
'Utilisation
Dim instance As AdomdDataReader
Dim i As Integer
Dim returnValue As Boolean

returnValue = instance.IsDBNull(i)

public bool IsDBNull(
    int i
)

public:
virtual bool IsDBNull(
    int i
) sealed

abstract IsDBNull : 
        i:int -> bool 
override IsDBNull : 
        i:int -> bool 

public final function IsDBNull(
    i : int
) : boolean

Paramètres

Valeur de retour

Type : System. . :: . .Boolean
A Boolean containing true if the column is set to null; false otherwise.

Implémente

IDataRecord. . :: . .IsDBNull(Int32)

Notes

Call this method to check for null column values before calling the typed methods used to retrieve column values (for example, GetByte, GetChar, and so on), to avoid raising an error.