Метод AdomdDataReader.IsDBNull
Returns a Boolean that contains a value indicating whether the column is set to null.
Пространство имен: Microsoft.AnalysisServices.AdomdClient
Сборка: Microsoft.AnalysisServices.AdomdClient (в Microsoft.AnalysisServices.AdomdClient.dll)
Синтаксис
'Декларация
Public Function IsDBNull ( _
ordinal As Integer _
) As Boolean
'Применение
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
Параметры
- ordinal
Тип: System.Int32
The zero-based ordinal position of the column to find.
Возвращаемое значение
Тип: System.Boolean
A Boolean containing true if the column is set to nullпустая ссылка (Nothing в Visual Basic); false otherwise.
Реализует
Замечания
Call this method to check for nullпустая ссылка (Nothing в 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.