asp.net - Control event not firing from within updatepanel -

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I go to a listbox that is being updated through a timer and in the form of expected working within an UpdatePanel Is in.

However, I can not bring the selected indicted event to the fire. I think there is something to do with a partial postback, does anyone know what I can do to do this work?

When I take it out of UpdatePanel it works fine even though obviously I can not do partial postbacks 

    
 UPDATE:  
 Now try to make changes below, the timer event is still working but not the selected induced event. . I am losing with this  
  & lt; ASP: UpdatePanel ID = "UpdatePanel" runat = "Server" ChildrenAsTriggers = "false" UpdateMode = "conditional" & gt; & Lt; ContentTemplate & gt; & Lt; ASP: Timer ID = "Timer 1" runat = "server" ontic = "timer 1 ticket" interval = "500" & gt; & Lt; / Asp: timer & gt; & Lt; asp: ListBox ID = "ListBox_JobPositions" runat = "server" height = "750px" width = "300px" Detasorsaidi = "sqlDataSource" DataTextField = "company" DataValueField = "Pid" on-chosen index = "Suchiboksi_jobpojhssiojit Indies" Otopostbak = " True "& gt; & Lt; / ASP: ListBox & gt; & Lt; / ContentTemplate & gt; & Lt; Trigger & gt; & Lt; Asp: AsyncPostBackTrigger ControlID = "timer 1" /> & Lt; / Trigger & gt;   
  
 Here is the list that is inside the ListBacked UpdatePanel, but then it does not work when it is not.  
  protected zero listboxes_ozojobs_selected index (object sender, event ergges e) {response. Wyeth ("Test"); }    
 
 
 You are not receiving this event, that is, your change Event is not due to postback due to your postback timer  
 The event receives asp.net timer event and not the ListBox event.  
 To resolve the problem, you should install  AutoPostBack  to correct. As a change in this data, as soon as a postback will cause the ListBox and its event must be activated  
    
 Since you have set the  UpdateMode  to  conditional , you also set  ChildrenAsTriggers  to correct should do. In this way, a postback in the list causes a partial update.  
  & lt; asp: UpdatePanel ID = "Apdetpanel" runat = "server" UpdateMode = "Conditional" ChildrenAsTriggers = "true" & gt;

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