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I assume were talking Dot Net * Querystring is derved from the URL Example: this.com?id=123&subject=this id and subject contain values that can be pulled out like this(c#) Request.QueryString[id] now cantains the string "123" * Viewstate is information used to bring controls back to there original state after a postback. With viewstate off, all controls would return to there default values.

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What is the Difference between session and viewstate in asp?

1) Viewstate is particular to a control/page whereas session is for the whole application. You can access the session data stored in page A in page B but viewstate does not behave so. 2) ViewState is maintained at client side whereas session is maintained at server side 3) Since viewstate is maintained at client, it does not have a concept of expiry but session will expire after the stipulated time 4) You can enable/disable view state for specific controls but you can't do that for session. abhishek patel, mobile number:9558551202


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