Multiple Timers - Only on is ticking RSS

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  Daikoku

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  Multiple Timers - Only on is ticking

  Apr 27, 2007 03:06 PM|LINK

  Hi,

  I have several UpdatePanels and a timer in each of them, as every panel has to be updated at different intervals. However, using the ASP.NET AJAX timer, only one is triggered and it seems to reset the other timers on the postback and thus the others never trigger. I was testing the Telerik Timer control and all of them were ticking properly, however it looks like they caused a memory leak in the WebDevServer as when using them, memory consumption always quickly shot up to over 1 GB.

  Does anyone know of a fix or workaround how to get all timers ticking properly?

   Thanks
   

  • Moved by tmorton on Apr 27, 2007 04:07 PM
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  pixelsyndica...

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  Re: Multiple Timers - Only on is ticking

  Apr 27, 2007 04:47 PM|LINK

  Hi Daikoku,

  as discussed in http://forums.asp.net/thread/1648410.aspx, the Ajax timers get reset on postback (even if they are in different update panels).  I think they have only begun delving into the potential of these controls.  I do not know that there is anything you can do about this behavior at this time.

  Please click 'Mark as Answer' if reply assisted you.
  
  "A common mistake that people make when trying to design something completely foolproof was to underestimate the ingenuity of complete fools." ~ Douglas Adams
  
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  Garbin

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  ASPInsiders

  Re: Multiple Timers - Only on is ticking

  Apr 27, 2007 06:57 PM|LINK

  Hi,

  as soon as you put the Timers into the UpdatePanels, they will be reset after a partial postback.

  Have you tried putting the Timers outside the UpdatePanels and referencing them as AsyncPostBack triggers?

  Alessandro Gallo | Blog | My book: ASP.NET AJAX In Action
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  Daikoku

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  33 Posts

  Re: Multiple Timers - Only on is ticking

  Apr 30, 2007 07:48 PM|LINK

  When I place the timers outside the UpdatePanel, the whole page is reloaded on every tick
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  Garbin

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  ASPInsiders

  Re: Multiple Timers - Only on is ticking

  Apr 30, 2007 08:40 PM|LINK

  Hi,

  if the timers are placed outside the UpdatePanel, you should add them as AsyncPostBack triggers for the UpdatePanel.

  Alessandro Gallo | Blog | My book: ASP.NET AJAX In Action
  • Marked as answer by bbcompent1 on Aug 08, 2012 12:02 PM
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  Daikoku

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  33 Posts

  Re: Multiple Timers - Only on is ticking

  May 01, 2007 08:39 AM|LINK

  Thanks, that seems to work
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  pixelsyndica...

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  Re: Multiple Timers - Only on is ticking

  May 01, 2007 03:06 PM|LINK

  Here is a solution I was able to use. Perhaps this will help someone visualize it.  I have two timers counting off; 1 counts seconds, the other counts 60 seconds. each triggers an update panel which adds a number to a labels current integer value and re-enabled the calling trigger.

  // codebehind
      protected void Page_Load(object sender, EventArgs e)
      {
          if (!IsPostBack)
          {
              Label1.Text = "0";
              Label2.Text = "0";
          }
      }
      protected void Timer1_Tick(object sender, EventArgs e)
      {
          int Time1 = Convert.ToInt16(Label1.Text);
          Time1 += 1;
          Label1.Text = Time1.ToString();
          if (Time1 >= 120) // stop the timer after two minutes
              ((Timer)sender).Enabled = false;
          else
              ((Timer)sender).Enabled = true;
      }
      protected void Timer2_Tick(object sender, EventArgs e)
      {
          int Time2 = Convert.ToInt16(Label2.Text);
          Time2 += 1;
          Label2.Text = Time2.ToString();
          ((Timer)sender).Enabled = true;
      }

    

      <div>
          <asp:ScriptManager ID="ScriptManager1" runat="server" />
          
          <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
              <ContentTemplate>
                  Seconds:
                  <asp:Label ID="Label1" runat="server" Style=""></asp:Label>
              </ContentTemplate>
              <Triggers>
                  <asp:AsyncPostBackTrigger ControlID="Timer1" />
              </Triggers>
          </asp:UpdatePanel>
      
          <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
              <ContentTemplate>
                  Minutes: 
                  <asp:Label ID="Label2" runat="server" Style=""></asp:Label> 
              </ContentTemplate>
              <Triggers>
                  <asp:AsyncPostBackTrigger ControlID="Timer2" />
              </Triggers>
          </asp:UpdatePanel>
      </div>            
          <asp:Timer ID="Timer1" runat="server" Interval="1000" OnTick="Timer1_Tick">
          </asp:Timer>
          <asp:Timer ID="Timer2" runat="server" OnTick="Timer2_Tick">
          </asp:Timer>

   

  ajax trigger Update Panel

  Please click 'Mark as Answer' if reply assisted you.
  
  "A common mistake that people make when trying to design something completely foolproof was to underestimate the ingenuity of complete fools." ~ Douglas Adams
  
  • Marked as answer by bbcompent1 on Aug 08, 2012 12:02 PM
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  vihangshah.i...

  Member

  7 Points

  6 Posts

  Re: Multiple Timers - Only on is ticking

  Aug 06, 2012 05:59 PM|LINK

  pixelsyndicate

  Here is a solution I was able to use. Perhaps this will help someone visualize it.  I have two timers counting off; 1 counts seconds, the other counts 60 seconds. each triggers an update panel which adds a number to a labels current integer value and re-enabled the calling trigger.

  // codebehind
      protected void Page_Load(object sender, EventArgs e)
      {
          if (!IsPostBack)
          {
              Label1.Text = "0";
              Label2.Text = "0";
          }
      }
      protected void Timer1_Tick(object sender, EventArgs e)
      {
          int Time1 = Convert.ToInt16(Label1.Text);
          Time1 += 1;
          Label1.Text = Time1.ToString();
          if (Time1 >= 120) // stop the timer after two minutes
              ((Timer)sender).Enabled = false;
          else
              ((Timer)sender).Enabled = true;
      }
      protected void Timer2_Tick(object sender, EventArgs e)
      {
          int Time2 = Convert.ToInt16(Label2.Text);
          Time2 += 1;
          Label2.Text = Time2.ToString();
          ((Timer)sender).Enabled = true;
      }

    

      <div>
          <asp:ScriptManager ID="ScriptManager1" runat="server" />
          
          <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
              <ContentTemplate>
                  Seconds:
                  <asp:Label ID="Label1" runat="server" Style=""></asp:Label>
              </ContentTemplate>
              <Triggers>
                  <asp:AsyncPostBackTrigger ControlID="Timer1" />
              </Triggers>
          </asp:UpdatePanel>
      
          <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
              <ContentTemplate>
                  Minutes: 
                  <asp:Label ID="Label2" runat="server" Style=""></asp:Label> 
              </ContentTemplate>
              <Triggers>
                  <asp:AsyncPostBackTrigger ControlID="Timer2" />
              </Triggers>
          </asp:UpdatePanel>
      </div>            
          <asp:Timer ID="Timer1" runat="server" Interval="1000" OnTick="Timer1_Tick">
          </asp:Timer>
          <asp:Timer ID="Timer2" runat="server" OnTick="Timer2_Tick">
          </asp:Timer>

   

  Thanks a lot man.. You saved a lot time of mine.. You are life saver.. Thanks a again..

  @VHNG

  Programing & Research leads to inventions.
  
  
  http://vihang-shah.blogspot.com/
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  chetan.sarod...

  All-Star

  65739 Points

  11138 Posts

  Re: Multiple Timers - Only on is ticking

  Aug 07, 2012 03:17 AM|LINK

  Refer this

  http://encosia.com/aspnet-ajax-timer-trouble-location-is-key/

  Chetan Sarode
  Senior Software Engineer,
  Approva Systems Pvt Ltd, Pune, India.