| Unbound Mode > Unbound Mode Events |
In DataMode 1 - Unbound, the list fires one event when it needs to determine a relative bookmark, another when it needs to fetch data rows. The first event is optional and can be implemented to improve performance; the second event is mandatory:
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Fired when the control needs to retrieve a bookmark. |
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Fired when the control requires unbound data for display. |
In DataMode 2 - Unbound Extended, the list fires a single event to acquire both data and relative bookmarks. This event is mandatory:
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Fired when the control needs to retrieve a bookmark or requires unbound data for display. |