Returns a Boolean that contains a value indicating whether the column is set to null.
命名空间： Microsoft.AnalysisServices.AdomdServer
程序集： msmgdsrv（在 msmgdsrv.dll 中）
语法
声明
Public Function IsDBNull ( _
i As Integer _
) As Boolean
用法
Dim instance As AdomdDataReader
Dim i As Integer
Dim returnValue As Boolean
returnValue = instance.IsDBNull(i)
public bool IsDBNull(
int i
)
public:
virtual bool IsDBNull(
int i
) sealed
abstract IsDBNull :
i:int -> bool
override IsDBNull :
i:int -> bool
public final function IsDBNull(
i : int
) : boolean
参数
- i
类型：System.Int32
The zero-based ordinal position of the column to find.
返回值
类型：System.Boolean
A Boolean containing true if the column is set to null; false otherwise.
实现
注释
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.