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IsNull 方法

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

命名空間：  Microsoft.SqlServer.Management.Trace
組件：  Microsoft.SqlServer.ConnectionInfoExtended (在 Microsoft.SqlServer.ConnectionInfoExtended.dll 中)

語法

'宣告
Public Function IsNull ( _
    ordinal As Integer _
) As Boolean
'用途
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

參數

傳回值

型別：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.

範例

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