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SQL Anywhere 11.0.0 » SQL Anywhere Server - Programming » SQL Anywhere Data Access APIs » SQL Anywhere .NET 2.0 API Reference » iAnywhere.Data.SQLAnywhere namespace (.NET 2.0) » SADataReader class


IsDBNull method

Returns a value indicating whether the column contains NULL values.

Visual Basic

Public Overrides Function IsDBNull( _
   ByVal ordinal As Integer _
) As Boolean

public override bool IsDBNull(
   int ordinal
  • ordinal¬†¬† The zero-based column ordinal.

Return value

Returns true if the specified column value is equivalent to DBNull. Otherwise, it returns false.


Call this method to check for NULL column values before calling the typed get methods (for example, GetByte, GetChar, and so on) to avoid raising an exception.

See also