If I give my report a DataTable with no rows as a DataSource, the web ReportViewer simply displays nothing at all. I would expect to see at least the report header, date, etc, maybe even labels, but with no detail rows. Barring this, I would like a message that no data was found, but I can find no properties on the Report or on the ReportView to handle this. Do I have to do it myself, and create a 'sister report', that looks the same, but has a message, and divert to that one if my DataTable is empty?