IsDBNull 方法
Returns a Boolean that contains a value indicating whether the column is set to null.
命名空間: Microsoft.AnalysisServices.AdomdClient
組件: Microsoft.AnalysisServices.AdomdClient (在 Microsoft.AnalysisServices.AdomdClient.dll 中)
語法
'宣告
Public Function IsDBNull ( _
ordinal As Integer _
) As Boolean
'用途
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
參數
- ordinal
型別:System. . :: . .Int32
The zero-based ordinal position of the column to find.
傳回值
型別:System. . :: . .Boolean
A Boolean containing true if the column is set to nullNothingnullptrunitnull 參考 (在 Visual Basic 中為 Nothing); false otherwise.