How to assign value to label from jquery and read the value from page load in asp.net?

Question

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My requirement is, i want to assign value to label before page load using jquery/javascript then i want to assign the label text to string in page load.

JavaScript

<script type="text/javascript">
<pre lang="xml">$(document).ready(function () {
        function MyFun() {
            $("#lblName").val("Test");
           
        }
    });
</script>

C#

protected void Page_Load(object sender, EventArgs e)
   {
      string str=lblName.Text;
   }

in page load method i am getting empty string.

Anybody help me that how to assign value to asp.net controls before page load then how to access those assigned values in page load.

Thanks you.

Posted 24-Mar-14 23:07pm

ponnapureddy

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Asgard25 25-Mar-14 5:30am

And try it on LoadComplete

vsrikanth87 25-Mar-14 6:06am

try in pageinit

3 solutions

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Asgard25 · Answer 1 · 2014-03-24T23:29:00

Try this, the JavaScript was binded to a click but just play around with it.
FunctionnameXwill be a function you made that you call.

C# code on page load:

VB

if( Request.QueryString[ "Action" ].Equals( "onload" ) )

                                         FunctionnameX( Request.QueryString[ "lblname" ].Trim()

The JavaScript:

JavaScript

var VARlblNAME = $("#lblName").text;
window.location.href = '../foldername/pagename.aspx?Action=onload&lblname=' + VARlblNAME;

Let me know if you got it working.

ponnapureddy · Answer 2 · 2014-03-24T23:45:00

Solution 3

Getting object reference exception.

The path of the project is D:\Demos\LangugeDemo\Default3.aspx

http://localhost:64067/LanguageDemo/Default3.aspx[^]

the below is aspx page.

HTML

<![CDATA[<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>]]>

Posted 24-Mar-14 23:45pm

ponnapureddy

Comments

Asgard25 25-Mar-14 8:49am

I have no idea how your code looks cause your hosting that locally..., but just make sure your IF statement is correct, just think by what I reckon is happening is that your calling an object that is null or not created yet

ponnapureddy · Answer 3 · 2014-03-25T00:05:00

XML

<pre lang="HTML">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>

<!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">
    <script type="text/javascript">
        debugger;
        function start() {
            document.getElementById('Hidden1').value = "somme value";
            var VARlblNAME = $("#lblName").text;
            window.location.href = 'LangugeDemo/Default3.aspx?Action=onload&lblname=' + VARlblNAME;
        }
    </script>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <input type="text" id="Hidden1" name="Hidden1" runat="server" />
    <div>
        <input type="submit" value="submit" />
    </div>
    </form>
</body>
</html>


</pre>


<pre lang="c#">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default3 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

        if( Request.QueryString[ "Action" ].Equals( "onload" ) )
        {

            string message = Request.QueryString["lblname"].Trim();
        }
    }
}

</pre>

Action value getting as null.

Please give me the solution.

Thanks in advance.

How to assign value to label from jquery and read the value from page load in asp.net?

3 solutions

Solution 2

Solution 3

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