Gets a Boolean value that specifies whether value of the data at the specified column position is null.
命名空间: Microsoft.SqlServer.Management.Trace
程序集: Microsoft.SqlServer.ConnectionInfo (in microsoft.sqlserver.connectioninfo.dll)
语法
声明
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
参数
- ordinal
返回值
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.
备注
This namespace, class, or member is supported only in version 2.0 of the Microsoft .NET Framework.
示例
线程安全
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
开发平台
有关支持的平台列表,请参阅安装 SQL Server 2005 的硬件和软件要求。
目标平台
有关支持的平台列表,请参阅安装 SQL Server 2005 的硬件和软件要求。
请参阅
参考
TraceReader Class
TraceReader Members
Microsoft.SqlServer.Management.Trace Namespace