We have an internal asp.net forms app where one page is essentially a WYSIWYG editor that users enter 3-5 paragraph reports into. What are the best options for an autosave feature with the minimum amount of user-interrupt? I don’t want to force a postback every five minutes or so unless I have to, but rather maybe some type of client-side check every time the text changes and compare that to the last time the information has been submitted, and go from there?
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This is a perfect task which could be solved by using AJAX. You could set some sort of timer to run that starts as soon as the user makes a change client-side and have it then do an asynchronous call client-side back to your server to send the contents of the WYSIWYG box. You could then disable the timer until the user starts editing again to avoid un-needed asynchronous calls.
This would certainly avoid interrupting the user with a postback.
There are lots of ways to do this but the following MSDN link would be a good start: