There appears to be an
IfxBulkCopy class in the ADO.NET provider for Informix. The class documentation is here:
If their provider is a good one, the usage of this class should be very similar, if not the same, as the
SqlBulkCopy class available for SQL Server. This will likely mean it takes a
DataTable or an
IDataReader implementation to
Bear in mind it is housed within the "IBM Data Server Provider for .NET", which might be different to where the standard ADO.NET provider stuff is housed.