1滴答后，ASP.Net（语言C＃）中的计时器停止

Question

i wanted to use a timer in a program i'm working on, but it always stops after 1 tick !! can you give me any tips to make it repeat unstoppably (or until i want it to) please ??
this is my code:

    int i = 20;

    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = "(20)";
    }

    protected void Timer1_Tick(object sender, EventArgs e)
    {
        i--;
        Label1.Text = "(" + i + ")";

        if (i == 0)
        {
            Session["Profession"] = "Visiteur";
            Response.Redirect("Acceuil.aspx");
        }

Edit: my HTML code :

<form id="form1" runat="server">
<div><center>
    <span class="style1">message</span><br 
        class="style1" />

    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>

    <asp:Timer ID="Timer1" runat="server" Interval="1000" ontick="Timer1_Tick" >
    </asp:Timer>

        <asp:Timer ID="Timer2" runat="server" Interval="1000">
    </asp:Timer>

        <br />
    <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
        <ContentTemplate>
            <asp:Label ID="Label1" runat="server"></asp:Label>
        </ContentTemplate>
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
        </Triggers>
    </asp:UpdatePanel>

    <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click" 
        PostBackUrl="~/Acceuil.aspx">Retour</asp:LinkButton>
    <br />
        </center>
</div>
</form>

Edit2: what i want to do is the normal redirecting code, count to 20 and refreshing every second (to show to user how much secs left) and at the end it redirects to a new page, but it wasn't working, so i was wondering why ?? and i think i got my answer from @Andrei Rînea, and thank you everyone for your help : )

Edit3: Solved and here is the code :

static int i = 20;
protected void Page_Load(object sender, EventArgs e)
{
    if(!Page.IsPostBack)
    Label1.Text = "20";
}
protected void Timer1_Tick(object sender, EventArgs e)
{

    i--;
    Label1.Text = i.ToString();

    if (i == 0)
    {
        i = 20;
        Session["Profession"] = "Visiteur";
        Response.Redirect("Acceuil.aspx");
    }
}

Thanks everyone again : )

Answer 1

I'm going to assume here that you are wishing to have a process that ticks away on your server in the background.

I'm also going to assume you've tried to add this to your Webform.

If so, the issue you have encountered, is that your Webform object only exists for the short time that it is processing your request, after which it is disposed of - including your timer.

If I'm correct, you'd probably like to take a look at Quartz.Net :

http://www.mikesdotnetting.com/article/254/scheduled-tasks-in-asp-net-with-quartz-net

Answer 2

You are trying to run client side code on the server. You need to do this in JavaScript instead.

The C# code will be run just before rendering the page and not longer. You probably believe the code will run as long as the visitor is on the page which is not the case.

Answer 3

Please use the following code :



    static int i = 20;
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!Page.IsPostBack)
        Label1.Text = "(20)";
    }
    protected void Timer1_Tick(object sender, EventArgs e)
    {

        i--;
        Label1.Text =i.ToString();

        if (i == 0)
        {
            Session["Profession"] = "Visiteur";
            Response.Redirect("Acceuil.aspx");
        }
    }


    your HTML code should be like :

    <form id="form1" runat="server">
        <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server">

            </asp:ScriptManager>


            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                     <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>



                 <asp:Timer ID="Timer1" runat="server" ontick="Timer1_Tick" Interval="1000">
                   </asp:Timer>
                </ContentTemplate>

            </asp:UpdatePanel>

        </div>
        </form>