通过

AdomdDataReader.IsDBNull Method

Returns a Boolean that contains a value indicating whether the column is set to null.

命名空间: Microsoft.AnalysisServices.AdomdClient
程序集: Microsoft.AnalysisServices.AdomdClient (in microsoft.analysisservices.adomdclient.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
    The zero-based ordinal position of the column to find.

返回值

A Boolean containing true if the column is set to null; false otherwise.

备注

Call this method to check for null column values before calling the typed methods used to retrieve column values (for example, GetByte, GetChar, and so on), to avoid raising an error.

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

AdomdDataReader Class
AdomdDataReader Members
Microsoft.AnalysisServices.AdomdClient Namespace