I have a Gridview with a ToolTip in an ItemTemplate Column Type, loading information
through an user control. At the top I have a DropDownList that filters the information
displayed when loading the page. The problem occurs when, in the first load of the page and,
according to the DropDownList filter value, there is no results; when I change
the filter value, and data is displayed in the gridview, the OnAjaxUpdate event does
not fire, which does not happen if i got results in the first page loading, so I think that
there is some kind of detail I'm forgetting, on the ItemDataBound event.