Update label on MasterPage from content page without full Postback

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Does there exist a solution for this scenario?

I had not used Script Manager on Masterpage as it is not required when i started developing the project so i have individual scriptmanager and Update panel for each content page .In the masterpage now i had added a label which Shows System Current Time and My client want that it should change asynchonously and give a live clock feeling. Can i change the label text of master page from the Content page using Timer event which will not postback the entire page.

Thanks in advance

Posted 3-Aug-12 2:28am

Dharmenrda Kumar Singh

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3 solutions

Solution 1

If you want to show the current time in your master page means you can have a javascript function()to show the time....

Posted 3-Aug-12 2:31am

Prabhakaran Soundarapandian

Updated 3-Aug-12 2:34am

v2

Comments

Dharmenrda Kumar Singh 3-Aug-12 8:35am

I tried from javascript but without update panel how i change the text of the label timely in masterpage?

BobJanova 3-Aug-12 9:54am

There's an important point here. The current time can be found on the client, with pure JS; you don't need AJAX or any server side gubbins at all.

Solution 3

Hi,
It's not possible to update a control of master page without posting back your page.
Put your label in your MasterPage in a separate UpdatePanel.
From your Handler call a function on MasterPage(i.e. ChangeText) that changes the Text of the Label and calls Update on the MasterPage's UpdatePanel.

Try discusstion1[^] and discusstion2[^].

--Amit

Posted 3-Aug-12 3:04am

_Amy

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Mohd Imran Saifi · Accepted Answer · 2012-08-03T02:36:00

Javascript to display continuous time on the Web page. By continuous it means that it will be displayed second by second.

XML

<script type="text/javascript">
        function ShowTime()
        {
            var dt = new Date();
            document.getElementById("<%= TextBox1.ClientID %>").value = dt.toLocaleTimeString();
            window.setTimeout("ShowTime()", 1000);
        }


    </script>

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

If you are using normal Webform then it can be called on Body load event. If you are using MasterPage then it can be called within ContentTemplate at the end afte all the controls will be rendered.