c# - Event when user navigates away from a page asp.net -


this question has answer here:

when page loaded use page_load event set value 1. in asp.net using c# want set value null whenever user navigates away page. page_unload not because runs when page loaded itself. event should use?

leaving page not require hit server there no way guarantee execution of c# code when user closes browser instance.

you can use javascript onbeforeunload flash warning message user. how can customize message depends on browser using (spoiler alert: firefox won't let customize message). require user has javascript enabled.

you might able rig javascript posts server onbeforeunload event, have play see if can working purposes.


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