c# - How to remove ViewState from updatepanel Ajax requests? -


i storing viewstate in session. when use updatepanel, still see this:

|0|hiddenfield|_eventtarget||0|hiddenfield|_eventargument||0|hiddenfield|_lastfocus||72|hiddenfield|_viewstate|/wepzwupogqwmtvizdayyzljm2ridkozqpgrsrlq7oljmrteqvksokerej+iwt7jwm4o3ey=|1|hiddenfield|_scrollpositionx|0|1|hiddenfield|_scrollpositiony|0|2524|hiddenfield|__eventvalidation|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|0|asyncpostbackcontrolids|||0|postbackcontrolids|||102|updatepanelids||tctl00$body$updigrp,,tctl00$body$updityp,,tctl00$body$updrpt,,tctl00$body$updsrch,,tctl00$body$upddoc,|0|childupdatepanelids|||57|panelstorefreshids||ctl00$body$updrpt,,ctl00$body$updsrch,,ctl00$body$upddoc,|2|asyncpostbacktimeout||90|0|formaction|||39|scriptstartupblock|scriptcontentnotags|removelastcolumn('ctl00_body_grvdocs');|208|scriptstartupblock|scriptcontentnotags|sys.application.add_init(function() { $create(sys.ui._updateprogress, {"associatedupdatepanelid":"ctl00_body_updrpt","displayafter":0,"dynamiclayout":false}, null, null, $get("ctl00_body_ctl07"));

is there way can prevent being sent in response?

extracted stackoverflow:

the __viewstate field used store control state, not optional. furthermore, information contained in view state used validate postback, if i'm not mistaken (and validation enabled, default). long have form runat="server", you'll have viewstate field. however, should notice smaller field size if disable viewstate.

by way, there tricks remove viewstate. check following post:

override render , strip viewstate out regex.


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