'Declaration Public Overloads Overrides NotOverridable Function IsDBNullAsync( _ ByVal ordinal As Integer, _ ByVal cancellationToken As CancellationToken _ ) As Task(Of Boolean)
'Usage Dim instance As TdDataReader Dim ordinal As Integer Dim cancellationToken As CancellationToken Dim value As Task(Of Boolean) value = instance.IsDBNullAsync(ordinal, cancellationToken)
public override Task<bool> IsDBNullAsync( int ordinal, CancellationToken cancellationToken )
public: Task<bool>^ IsDBNullAsync( int ordinal, CancellationToken cancellationToken ) override
Parameters
- ordinal
- Column ordinal (see TdDataReader.GetOrdinal).
- cancellationToken
- A Threading.CancellationToken used to indicate that the asynchronous operation should be canceled.
Return Value
Returns a Task<Boolean> with a value of
true if the value of the specified field (i) is null, or false if it is not.