Metodo IsDBNull
Returns a Boolean that contains a value indicating whether the column is set to null.
Spazio dei nomi Microsoft.AnalysisServices.AdomdClient
Assembly: Microsoft.AnalysisServices.AdomdClient (in Microsoft.AnalysisServices.AdomdClient.dll)
Sintassi
'Dichiarazione
Public Function IsDBNull ( _
ordinal As Integer _
) As Boolean
'Utilizzo
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
Parametri
- ordinal
Tipo: System. . :: . .Int32
The zero-based ordinal position of the column to find.
Valore restituito
Tipo: System. . :: . .Boolean
A Boolean containing true if the column is set to nullNothingnullptrunitriferimento Null (Nothing in Visual Basic).; false otherwise.
Implementa
Osservazioni
Call this method to check for null Nothing nullptr unit riferimento Null (Nothing in 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.
Vedere anche