how can I get javascript value

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how can I get javascript value to server side on post back with page contains master page?

Posted 27-Aug-10 21:58pm

aqsana48

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Sandeep Mewara 28-Aug-10 5:22am

Just in case, hope you are not talking of partial update via postback using Javascript == AJAX.

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AspDotNetDev · Answer 1 · 2010-08-27T22:18:00

Solution 1

Set the value of a hidden input field.

Posted 27-Aug-10 22:18pm

AspDotNetDev

Christian Graus · Answer 2 · 2010-08-27T22:39:00

Solution 2

The master page is utterly irrelevant. You should set a literal, so that it has viewstate, that's a lot simpler than creating a HTML control and searching for it in the post data.

Posted 27-Aug-10 22:39pm

Christian Graus

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AspDotNetDev 28-Aug-10 5:06am

Are you talking about an asp:Literal control? How is that supposed to help transfer client state to the server on postback? Literal controls don't render to anything except for the text you set on them, so it's not like you can find that rendered literal and set a value on it that will get sent back to the server.

AspDotNetDev 28-Aug-10 5:11am

I wasn't sure what you were talking about, so I added a working example as an answer.

AspDotNetDev · Answer 3 · 2010-08-27T23:10:00

Not sure what Graus is talking about, so I thought I'd create a working example. The page:

XML

<%@ Page Language="C#" AutoEventWireup="true"
    CodeBehind="Default.aspx.cs"
    Inherits="WebApplication1._Default" %>
<html>
<body>
    <form id="form1" runat="server">
    <div>
        <input runat="server" id="myData" type="hidden" />
        <script language="javascript">
            var field = document.getElementById("<%= myData.ClientID %>");
            field.value = "javascript set this value";
        </script>
        <asp:Button runat="server" ID="btnGo" Text="Go" />
    </div>
    </form>
</body>
</html>

The code behind:

C#

namespace WebApplication1
{
    using System;
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (Page.IsPostBack)
            {
                btnGo.Text = myData.Value;
            }
        }
    }
}

aqsana48 · Answer 4 · 2010-08-27T23:21:00

Solution 4

I putted hidden field but when you fired
server side code the controls for server
side didn't affect

Posted 27-Aug-10 23:21pm

aqsana48

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AspDotNetDev 28-Aug-10 14:22pm

The example I posted works. I tried it myself. If you have a new question, post a new question as a new question, not as a fake answer.

how can I get javascript value

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