Teroid Data Filter - Version 1.0 The Teroid Data Filter is a .NET control which configures itself with a set of controls for each column in a data source allowing the user to specify filter criteria, sort order and the inclusion of each column. The data source can be set at design time or in code as a connection string, a Connection, a DataSet or a DataTable. The user's selections are returned to the client application as SQL strings for use within the client application.