Article
03/31/2012

Méthode IsNull

Gets a Boolean value that specifies whether value of the data at the specified column position is null.

Espace de noms : Microsoft.SqlServer.Management.Trace
Assembly : Microsoft.SqlServer.ConnectionInfoExtended (en Microsoft.SqlServer.ConnectionInfoExtended.dll)

Syntaxe

'Déclaration
Public Function IsNull ( _
    ordinal As Integer _
) As Boolean
'Utilisation
Dim instance As TraceReader
Dim ordinal As Integer
Dim returnValue As Boolean

returnValue = instance.IsNull(ordinal)

public bool IsNull(
    int ordinal
)

public:
bool IsNull(
    int ordinal
)

member IsNull : 
        ordinal:int -> bool

public function IsNull(
    ordinal : int
) : boolean

Paramètres

ordinal
Type : System. . :: . .Int32
An Int32 value that specifies the column position of the data.

Valeur de retour

Type : System. . :: . .Boolean
A Boolean value that specifies whether value of the data at the specified column is null.
If True, the value is null.
If False, the value is not null.