Статья
04/01/2012

Метод IsNull

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

Пространство имен: Microsoft.SqlServer.Management.Trace
Сборка: Microsoft.SqlServer.ConnectionInfoExtended (в Microsoft.SqlServer.ConnectionInfoExtended.dll)

Синтаксис

'Декларация
Public Function IsNull ( _
    ordinal As Integer _
) As Boolean
'Применение
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

Параметры

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

Возвращаемое значение

Тип: 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.