Show (label control) inside (repeater control) at timer tick

Question

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I have repeater that show questions and 4 option of answer , i want to show correct answer after one minute

What I have tried:

HTML

    <asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <asp:Label ID="lblTime" runat="server" />
        <br />
        <asp:Repeater ID="Repeater1" runat="server" DataSourceID="SqlDataSource1">
            <ItemTemplate >
                <div class="panel-heading">
                    
                    <div class="panel-title btn-label q-border">
                          <h3 class="Golden-color"><span class="label label-success" style="margin-left:10px;" id="qid"><%# Eval("Category") %></span><%# Eval("Question") %></h3>
                    </div>
                    <h2 id="counter" class="Golden-color"></h2>
                     
                </div>
                <div class="panel-body card ">

          <div class="quiz" id="quiz" data-toggle="buttons">
           <label class="element-animation1 btn btn-lg btn-transparent btn-block"><span class="btn-label"></span> <input type="radio" name="q_answer" value="2">
               <%# Eval("OptionB") %>
           </label>
           <label class="element-animation3 btn btn-lg btn-transparent btn-block"><span class="btn-label">^__i class="glyphicon">ج</span> <input type="radio" name="q_answer" value="3">
               <%# Eval("OptionC") %>
           </label>
           <label class="element-animation4 btn btn-lg btn-transparent btn-block"><span class="btn-label">^__i class="glyphicon">د</span> <input type="radio" name="q_answer" value="4">
                <%# Eval("OptionD") %>
           </label>
              <asp:Label ID="LblCorrectAnswer" runat="server" Visible="false" Text='<%#Eval("CorrectAnswer")%>' CssClass="label label-success"></asp:Label>
       </div>
   </div>
            </ItemTemplate>
            
        </asp:Repeater>
       
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DefaultConnection %>"
            SelectCommand="SELECT TOP 1 * FROM Questions ORDER BY NEWID()"></asp:SqlDataSource>
        <asp:Timer ID="Timer1" runat="server" OnTick="TimerTick" Interval="10000" Enabled ="true"  />
    </ContentTemplate>
</asp:UpdatePanel>

VB

Protected Sub TimerTick(ByVal sender As Object, ByVal e As RepeaterItemEventArgs)
    If e.Item.ItemType = ListItemType.Item OrElse e.Item.ItemType = ListItemType.AlternatingItem Then
        Dim lbl As Label = TryCast(e.Item.FindControl("LblCorrectAnswer"), Label)
        lbl.Visible = True
    End If
    Timer1.Enabled = False
End Sub

Posted 20-Jul-19 4:44am

Member 11057552

Updated 21-Jul-19 0:22am

Nelek

v2

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Dave Kreskowiak · Accepted Answer · 2019-07-20T05:18:00

You're going to have to rework this. You don't seem to realize that all of the VB.NET code you wrote runs on the server-side only. ASP.NET code generates HTML to send to the client.

That Time you're using will NOT work. It's running entirely on the server. That code will not modify the content of any label control on the client side.

If you're going to modify the content of a label on the client, you're going to have to write javascript code that runs on the client to modify the content of the HTML that the "label control" becomes client-side.