Category: JavaScript

16 Sep 2016 00:12

Joined:	14/05/2014
Level:	Silver
Points:	101

Points:	2

How to access the js value in code behind(in server side)

Hello Sir

I have some problem regarding access the value

I wan to use some value in code behind on_load() which will set from the javascript window.onload()
and it will display always blank

is there any way to set value in js(onload()) and access in code behind

Thanks
Bhavik Shah

#767851

16 Sep 2016 21:47

Joined:	13/06/2007
Level:	Gold
Points:	21327

Points:	2

if you want to access some value on_Page_load() in code being why don't you directly code it on page_load why you want to use client side scripting, you can easily fetch data from database and access it from code behind

Thanks
Koolprasd2003
Editor, DotNetSpider MVM
Microsoft MVP 2014 [ASP.NET/IIS]

#767867

20 Sep 2016 01:10

Joined:	03/05/2013
Level:	Gold
Points:	15822

Points:	2

Hi,

if you want to access your server side value into client side and client side value into server side the best approach is using Hidden Fields, using hidden fields we can easily accessible the values.

--------------------------------------------------------------------------------
Give respect to your work, Instead of trying to impress your boss.

N@veen
Blog : http://naveens-dotnet.blogspot.in/

#767879

20 Sep 2016 03:33

Joined:	14/04/2016
Level:	Silver
Points:	118

Points:	4

Hi,

you can use hidden fields to pass the values from client to server side and vice versa.
Refer below example for this.

<body onload="getScreenSize()">
<form id="form1" runat="server">

<input type="hidden" name="hiddenW" ID="hiddenW" runat="server" />
<input type="hidden" name="hiddenH" ID="hiddenH" runat="server" />
<script>
function getScreenSize() {
var myW = document.getElementById("hiddenW");
myW.value = window.innerWidth;
var myH = document.getElementById("hiddenH");
myH.value = window.innerHeight;
}
</script>
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>
</body>

Code behind:
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Response.Write(hiddenW.Value+" by " +hiddenH.Value);
}

}

#767900

22 Sep 2016 03:33

Joined:	13/07/2011
Level:	Gold
Points:	4261

Points:	3

Hi,

Refer the below..
We can pass data from Javascript to the C# code by using hiddenfields.


clientside:
window.onload = function() {
document.getElementById('<%=hidden1.ClientID%>').value=20;
};

<asp:HiddenField ID="hidden1" runat="server" />

Code behind:
Page_Load()
{
textbox1.text= hidden1.value;
}

Hope this will help you

Regards,
SonyShiva
Never lose hope..You never know what tomorrow will bring

#770446

03 Jan 2025 21:37

Joined:	28/09/2005
Level:	Gold
Points:	637

Points:	3

Firstly, please understand the flow of any page rendering at client side
when you browse any page, first it will execute the code behind and then execute client side stuff, so there is no question of using client side value at code behind in this case.
if you want to hit the page second time after setting some value at client side, then you follow the hidden fields approach to set the value and use same at code behind on page refresh or page submit.

Thanks!
B.Ramana Reddy

How to access the js value in code behind(in server side)

About dotnetspider.com

Quick Links

General

Services