Build 2.9.0.50 of xlsgen makes it possible to set timeout for SQL queries. Command and connection timeouts are respectively 30 seconds and 15 seconds by default, so there was a need to be able to change these. Zero is a special value which means indefinite wait.
The settings are to be done before the connection string.
The two new properties, CommandTimeout and ConnectionTimeout are exposed in the
IXlsTableDataSource interface.