Multiple Timers - Only on is ticking

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

Hi Daikoku,

as discussed inhttp://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.

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?

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

Hi,

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

Thanks, that seems to work

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.

// codebehindprotected 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>

multiple update panels each with a timer

I have a very simple page. It has 1 script manager and 2 update panels. Each update panel has a label and a timer. the timers are set 1 second and each simply updates the label with the current time. The first timer works and displays the time. The second never fires. Any one have any ideas? Here is the page...

<%

@dotnet.itags.org.PageLanguage="C#"AutoEventWireup="true"CodeBehind="Default.aspx.cs"Inherits="WebApplication1._Default" %>

<%

@dotnet.itags.org.RegisterAssembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"Namespace="System.Web.UI"TagPrefix="asp" %>

<!

DOCTYPEhtmlPUBLIC"-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<

htmlxmlns="http://www.w3.org/1999/xhtml">

<

headrunat="server"><title>Untitled Page</title>

</

head>

<

body><formid="form1"runat="server"><div><asp:ScriptManagerID="ScriptManager1"runat="server"></asp:ScriptManager>

</div> <asp:UpdatePanelID="UpdatePanelFirst"runat="server"><ContentTemplate><asp:TimerID="TimerFirst"runat="server"Interval="1000"OnTick="TimerFirst_Tick"></asp:Timer><asp:LabelID="LabelFirst"runat="server"></asp:Label></ContentTemplate></asp:UpdatePanel><asp:UpdatePanelID="UpdatePanel1"runat="server"><ContentTemplate><asp:TimerID="Timer1"runat="server"Interval="1000"OnTick="Timer1_Tick"></asp:Timer><asp:LabelID="Label1"runat="server"Text="Label"></asp:Label></ContentTemplate></asp:UpdatePanel></form>

</

body>

</

html>

and the code behind.

using

System;

using

System.Data;

using

System.Configuration;

using

System.Collections;

using

System.Web;

using

System.Web.Security;

using

System.Web.UI;

using

System.Web.UI.WebControls;

using

System.Web.UI.WebControls.WebParts;

using

System.Web.UI.HtmlControls;

namespace

WebApplication1

{

publicpartialclass_Default : System.Web.UI.Page

{

protectedvoid Page_Load(object sender,EventArgs e)

{

}

protected

void Timer1_Tick(object sender,EventArgs e)

{

Label1.Text =

DateTime.Now.ToShortTimeString();

}

protectedvoid TimerFirst_Tick(object sender,EventArgs e)

{

LabelFirst.Text =

DateTime.Now.ToLongTimeString();

}

}

}

I am not sure about your requirement. If you are trying to update both the labels at the same time one timer will do.

But if you want both the Timer ticks to work modify your code as follows:

protected

void Timer1_Tick(object sender,EventArgs e)

{

Timer1.Enabled =

false;

Timer2.Enabled =

true;

Label1.Text = System.

DateTime.Now.ToLongTimeString();

}

protectedvoid Timer2_Tick(object sender,EventArgs e)

{

Timer2.Enabled =

false;

Timer1.Enabled =

true ;

Label2.Text = System.

DateTime.Now.ToLongTimeString();

}

My gridview is not update

Hi,

I have an update panel in my page which contain a grid view.

I need to refresh my page periodically. I am using Timer for that. Here is my code

<asp:UpdatePanelID="UpdatePanel1"runat="server">

<ContentTemplate>

<asp:TimerID="Timer1"runat="server"Interval="10000">

</asp:Timer>

...................

<asp:GridViewID="GridView1"runat="server"SkinId="SampleGridView"CssSelectorClass="PrettyGridView"

DataKeyNames="ID"DataSourceID="SqlDataSource2"OnSelectedIndexChanged="GridView1_SelectedIndexChanged"

OnRowCommand="VerDiagramRed"Width="666px"OnDataBound="GridView1_DataBound"AutoGenerateColumns="False">

<Columns>

<asp:CommandFieldShowSelectButton="True"SelectText="Routers"/>

<asp:BoundFieldDataField="ID"HeaderText="ID"InsertVisible="False"ReadOnly="True"

SortExpression="ID"/>

<asp:BoundFieldDataField="Nombre"HeaderText="Nombre"SortExpression="Nombre"/>

<asp:BoundFieldDataField="Lectura"HeaderText="Lectura"SortExpression="Lectura"/>

<asp:BoundFieldDataField="Errores"HeaderText="Errores"SortExpression="Errores"/>

<asp:BoundFieldDataField="Estado"HeaderText="Estado"SortExpression="Estado"/>

<asp:ButtonFieldButtonType="Image"CommandName="diagram"HeaderText="Plano"

Text="Diagrama"ImageUrl="~/images/diagrama1.jpg"/>

</Columns>

</asp:GridView>

</ContentTemplate></asp:UpdatePanel>

DataGrid is not refreshed. What am doing wrong?

Thank you

Hi!

Follow these steps and it should work:

- Take the Timer out of the UpdatePanel.
- Set the UpdatePanel's properties UpdateMode="Conditional" and ChildrenAsTriggers="false"
- Add a trigger to the UpdatePanel's triggers collection:

<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" EventName="OnTick" />
</Triggers>

Now, as you are doing something on OnSelectedIndexChanged and OnRowCommand, are you sure that you need the Timer at all? Is not enough to refresh the GridView on these events?

Anyway, don't forget to add triggers for each event you are handling.

Hope this helps,

You can use Timer Control & you can trigger it's OnTick event..

So that it will periodically refreshes the GridView

Thank you very much. I did what you said and it is working perfectly.

I need to do refresh periodically because the users needs to monitor the information in the gridview.