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  • Artículo

IsDBNull Método

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

Espacio de nombres:  Microsoft.AnalysisServices.AdomdClient
Ensamblado:  Microsoft.AnalysisServices.AdomdClient (en Microsoft.AnalysisServices.AdomdClient.dll)

Sintaxis

'Declaración
Public Function IsDBNull ( _
    ordinal As Integer _
) As Boolean
'Uso
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

Parámetros

Valor devuelto

Tipo: System. . :: . .Boolean
A Boolean containing true if the column is set to nullNothingnullptrunites una referencia NULL (Nothing en Visual Basic).; false otherwise.

Implementa

IDataRecord. . :: . .IsDBNull(Int32)

Comentarios

Call this method to check for null Nothing nullptr unit es una referencia NULL (Nothing en 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.