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.ConnectionInfo (in microsoft.sqlserver.connectioninfo.dll)
語法
'宣告
Public Function IsNull ( _
ordinal As Integer _
) As Boolean
public bool IsNull (
int ordinal
)
public:
bool IsNull (
int ordinal
)
public boolean IsNull (
int ordinal
)
public function IsNull (
ordinal : int
) : boolean
參數
- ordinal
傳回值
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.
備註
This namespace, class, or member is supported only in version 2.0 of the Microsoft .NET Framework.
範例
執行緒安全性
Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
平台
開發平台
如需受支援的平台清單，請參閱＜安裝 SQL Server 2005 的硬體和軟體需求＞。
目標平台
如需受支援的平台清單，請參閱＜安裝 SQL Server 2005 的硬體和軟體需求＞。
請參閱
參考
TraceReader Class
TraceReader Members
Microsoft.SqlServer.Management.Trace Namespace