The client OnRowSelecting event never fires. It goes straight to the postback.
The client OnClick event fires, but it doesn't do me any good since that event is not cancellable. How am I supposed to catch that action on the client side?
I cannot reproduce the issue at my end.Make sure that you have enabled javascript for the browser. Take a look at the following demo which explains more about Client Side events. Grid / Client Objects and Events .