Looking at http://www.telerik.com/support/kb/reporting/details/changing-the-connection-string-dynamically-according-to-runtime-data
It says: "If you intend to use the above code for modifying reports displayed by an HTML5 Viewer, the code must be placed in the Resolve method of a custom resolver used by the Reporting REST service."
Is it not possible to change the connection string used by a TRDX report in the code behind of the report's ASPX? I'm looking to have a pretty static report with two parameters that I will pass from session, and the connection string be determined at that same time. I'd rather keep with the same model we're using for filling RadGrid's if possible. I don't think we'd be comfortable having our connection strings saved in the reports.