asp.net - Creating UpdatePanel dynamically for a custom control is causing a full post back -


i've been jammed on day now. need create custom control, , proof of concept, trying create updatepanel , add button it. it causes full page post back.

code (custom control):

imports system.text imports system.web.ui imports system.web.ui.webcontrols imports system.componentmodel imports ajaxcontroltoolkit  <designer(gettype(hmxicdsearchtooldesigner))> _ public class hmxicdsearchtool inherits hmxisbasecompositecontrol implements inamingcontainer  private const default_width integer = 650 private const default_height integer = 450  private _pnlupdate updatepanel = nothing private _btntest button = nothing private _lbl label = nothing  protected overrides sub createchildcontrols()     mybase.createchildcontrols()      _pnlupdate = new updatepanel()     _pnlupdate         .id = "pnlupdate"         .childrenastriggers = false         .updatemode = updatepanelupdatemode.conditional     end      _btntest = new button()     _btntest         .id = "btntest"         .text = "test button"         .causesvalidation = false         addhandler .click, addressof btn_click     end      _lbl = new label()     _lbl         .id = "lbl"         .text = "hello!"     end      _pnlupdate.contenttemplatecontainer.controls.add(_btntest)     _pnlupdate.contenttemplatecontainer.controls.add(_lbl)      dim atrigger asyncpostbacktrigger = new asyncpostbacktrigger()     atrigger         .controlid = "btntest"         .eventname = "click"     end      me._pnlupdate.triggers.add(atrigger)      me.controls.add(_pnlupdate)      me.style.add("background-color", "red")     me.height = 500     me.width = 500 end sub  protected sub btn_click(byval sender object, byval e system.eventargs)     if not me.page.ispostback         me._lbl.text = "async postback."     end if end sub end class

any thoughts appreciated. have tried toggling childrenastriggers, putting code in me.load, among other things.

it performing partial postback whole time.

i made mistake of testing see if partial postback so:

if page.ispostback    'something here end

when should have been checking this

me.scriptmanager.isinasyncpostback

this: page.ispostback true if performing partial postback.


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