Trigger UpdatePanel on mouse over (as tooltip)

Question

I need to display aditional information, like a tooltip, but it's a lot of info (about 500 - 600 characters) on the items in a RadioButtonList.

I now trigger the update on a PanelUpdate when the user selects an item in the RadioButtonList, using OnSelectedIndexChanged and AutoPostBack. What I would like to do, is trigger this on onMouseHover (ie. user holds the mouse a second or two over the item) rather than mouse click but I cannot find a way to do this.

Answer 1

You could try setting an AsyncPostBackTrigger on the updatePanel to watch the value of a hidden field. Then in the javascript onMouseHover event, increment the hidden value. This would fire the AsyncPostBackTrigger, updating the UpdatePanel.