I have a solution similiar to the outlined example here: http://demos.telerik.com/aspnet-ajax/controls/examples/integration/tooltipgrid/defaultcs.aspx?product=tooltip
However, I would like to have a mouseover tooltip within the detail rows as well.
Adding the controls of the master table view to the tooltip manager works fine. Adding the controls of the detail table also works but the tooltip doesn't work. In viewing the source of the web page, I noticed that the TargetControls for my detail rows was empty. Also, I could not find the detail row information in the view source. The same thing happens with the example above.
If you expand Bigfoot Breweries and do a view source on the page, you will find Bigfoot Breweries but you cannot find Laughing Lumberjack Lager (which is one of the detail rows). I think once I get the detail rows to be persisted on the page, the tooltip manager will work.