What is preferable, keeping a dataset in session or filling the dataset on each postback?
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What is preferable, keeping a dataset in session or filling the dataset on each postback?
That would depend on many factors. It is usually best not to keep too many items in session memory if your session is inproc or on a state server because it is less scalable.
If your session resides on the database, it might be better to just requery and repopulate the dataset unless the query is costly to execute.