TraceReader.IsNull 方法

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.ConnectionInfoExtended (在 Microsoft.SqlServer.ConnectionInfoExtended.dll 中)

語法

'宣告
Public Function IsNull ( _
    ordinal As Integer _
) As Boolean
'用途
Dim instance As TraceReader 
Dim ordinal As Integer 
Dim returnValue As Boolean 

returnValue = instance.IsNull(ordinal)

public bool IsNull(
    int ordinal
)

public:
bool IsNull(
    int ordinal
)

member IsNull : 
        ordinal:int -> bool

public function IsNull(
    ordinal : int
) : boolean

參數

ordinal
型別：System.Int32
An Int32 value that specifies the column position of the data.

傳回值

型別：System.Boolean
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.