Метод IsDBNull

Синтаксис

'Декларация
Public Function IsDBNull ( _
    i As Integer _
) As Boolean
'Применение
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

Реализует

IDataRecord. . :: . .IsDBNull(Int32)

Замечания

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.

См. также

Справочник