ASP.NET Ajax Timer Control

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Hello All,

I am designing a quiz website.

I want to periodically display the next questions, say after 30 seconds.

I am using a Ajax Timer control for the same. But the periodic change of questions is not reflected when I run the code.

It changes only when I click the button.

Below is the code.

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="BusinessQuestions.aspx.cs" Inherits="BusinessQuestions" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div style="height: 640px">
        <br />
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:Timer ID="Timer1" runat="server" Interval="3000" OnTick="Timer1_Tick">
        </asp:Timer>
        <br />
        <br />
        <br />
        <br />
        <br />
        <br />
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <Triggers>
        <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />

        </Triggers>
            <ContentTemplate>
                <asp:Label ID="Label1" runat="server" Font-Bold="True" Font-Names="Verdana"
                    Font-Size="Medium" Text="Label"></asp:Label>
                <br />
                <br />
                <br />
                <br />
                <asp:RadioButtonList ID="RadioButtonList1" runat="server" BackColor="#003399"
                    BorderColor="#0000CC" BorderStyle="Solid" ForeColor="White">
                </asp:RadioButtonList>
                <br />
                <br />
            </ContentTemplate>
        </asp:UpdatePanel>
        <br />
        <br />
        <br />
        <br />
        <br />
        <br />
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Next" />
    </div>
    </form>
</body>
</html>

Now is the code behind file.

public partial class BusinessQuestions : System.Web.UI.Page
{
    int intTotalQuestion;
    int intQuestionNo = 1;
    int intScore = 0;
    ArrayList Answers;

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            intTotalQuestion = 15;
            ViewState["StartTime"] = DateTime.Now;
            //ShowQuestion(intQuestionNo);
            Timer1_Tick(sender, e);
        }


    }

    protected void Timer1_Tick(object sender, EventArgs e)
    {
        ShowQuestion(intQuestionNo);

    }


    public void ShowQuestion(int intQuestionNo)
    {
        string XmlPath = Server.MapPath("Business-Questions.xml");
        XPathDocument xdoc = new XPathDocument(XmlPath);

        XPathNavigator xNav = xdoc.CreateNavigator();
        XPathNodeIterator xNodeIterator;

        string strXpath;
        int intLoop;
        
        strXpath = "/quiz/mchoice[" + intQuestionNo.ToString() + "]";
        xNodeIterator = xNav.Select(strXpath + "/question");
        while(xNodeIterator.MoveNext())
        {


            Label1.Text = intQuestionNo.ToString() + ". " + xNodeIterator.Current.Value;

            xNodeIterator = xNav.Select(strXpath + "/answer");
            RadioButtonList1.Items.Clear();

            intLoop = 0;
            while (xNodeIterator.MoveNext())
            {
                intLoop += 1;

                //intScore = 0;
                RadioButtonList1.Items.Add(new ListItem(xNodeIterator.Current.Value, intLoop.ToString()));
                if (xNodeIterator.Current.GetAttribute("correct", "") == "yes")
                {
                    ViewState["CorrectAnswer"] = intLoop;
                }
            }

                
               
            }
    
            ViewState["TotalQuestion"] = intTotalQuestion;
            ViewState["QuestionNo"] = intQuestionNo;
            ViewState["Score"] = intScore;
            ViewState["AnswerHistory"] = Answers;

        
    }





    protected void Button1_Click(object sender, EventArgs e)
    {
        intTotalQuestion = (int)ViewState["TotalQuestion"];
        intQuestionNo = (int)ViewState["QuestionNo"];
        intScore = (int)ViewState["Score"];
        Answers = (ArrayList)ViewState["AnswerHistory"];

        if (RadioButtonList1.SelectedItem == null)
        {
            intScore += 0;
        }

        
        else if (RadioButtonList1.SelectedItem.Value == ViewState["CorrectAnswer"].ToString())
        {
            intScore += 10;
        }
        else
        {
            intScore = intScore - 1;
        }

        if (intQuestionNo == intTotalQuestion)
        {
            
            Response.Write("Your Score is " + intScore.ToString() + " Points");
            Response.Write("\n\n");
            Response.Write("Quiz over");
        }
        else
        {

            intQuestionNo = intQuestionNo + 1;
            ShowQuestion(intQuestionNo);
        }

    }
}

Can anybody assist ?

Regards

MK

Posted 23-Nov-10 6:24am

Mukund Kallapur

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3 solutions

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E.F. Nijboer · Answer 1 · 2010-11-23T07:02:00

Solution 1

intQuestionNo is initialized to 1 every time. Try 'store it in' and 'get it from' the viewstate.

Your interval is now 3 seconds by the way.

Good luck!

Posted 23-Nov-10 7:02am

E.F. Nijboer

silvioyf · Answer 2 · 2010-11-23T07:16:00

Solution 2

Try increment intQuestionNo in Timer1_Tick before execute ShowQuestion(intQuestionNo);

I hope this help.

---------------------------------------------
My site:
Imóveis em Guarulhos a venda

Posted 23-Nov-10 7:16am

silvioyf

Updated 23-Nov-10 7:24am

v2

Comments

Mukund Kallapur 26-Nov-10 11:48am

Hey...

Thanks for the answer...but its not working...Can u pls give any other solution or atleast a hint ?

silvioyf 30-Nov-10 19:56pm

You found a solution? Which part is not working?

hzpsystem · Answer 3 · 2010-11-23T19:16:00

Solution 3

I also encountered this problem,Who can provide an effective method.Thanks.

Posted 23-Nov-10 19:16pm

hzpsystem