Specifies whether the specified column is set to 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 IsDBNull ( _
ordinal As Integer _
) As Boolean
public bool IsDBNull (
int ordinal
)
public:
virtual bool IsDBNull (
int ordinal
) sealed
public final boolean IsDBNull (
int ordinal
)
public final function IsDBNull (
ordinal : int
) : boolean
参数
- ordinal
返回值
A Boolean value that specifies whether the specified column is set to null. If True, the value is null. If False, the 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