How to pass the client side values to server side?

 hello to All,

Actually i wanna implement a code like... a string in HTML textbox retrieve in server side control....

suppose i hv a HTML control <input type="text" id="txtHTML"/>, and dis control  txtHTML.text="abc".

now i want to retrieve dis client side string "abc" in d server side textbox named "txtASP"...which hs a property runat="server"

so please give me an idea how to pass values from client side to server side.... hope u understand a problem...


2/23/2008 2:04:39 PM 93655 articles. 5 followers. Follow

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You could do this

<input type="text" id="txtHTML" runat="server" />


Then in your server side code access the value like this

string value = txtHTML.Value;


But why not just use an <asp:TextBox />  control?

Chief Architect
Software Engineer
Smooth Fusion, Inc.
2/23/2008 2:13:48 PM

Hi Sam,

If your Html input element as a diferent ID from the server control then no automatic recovery will be done.

In order to allow a automatic recovery of the client-side value you must ensure that the Server-Side control has the exact same ID, in your case it must be txtHTML and not txtASP.

Has the previous post noted, this scenary makes little sense since you could simple remove the Html input element and let the ASP:Textbox take care of that.

Here is a little sample:


<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

<html xmlns="" >
<head runat="server">
    <title>Untitled Page</title>
    <form id="form1" runat="server">
        <asp:TextBox ID="TextBox1" runat="server"/>


using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
    protected override void OnLoad(EventArgs e)

        string recoveredText = TextBox1.Text
Nuno Gomes [visit my blog]
Portugal - Europe's West Coast
[Don't forget to click "Mark as Answer" on the post(s) that helped you.]
2/24/2008 3:04:51 AM

Hi samVaidankar,

      To pass the value of client side, you can use javascript to pass that value to a <asp:HiddenField > first, then do a post back. At the server side you can retrive the value.

    Here is an example:

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page
    protected void Page_Load(object sender, EventArgs e)
        Response.Write("The input value is: " + HiddenField1.Value.ToString());

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

<html xmlns="" >
<head runat="server">
    <title>Untitled Page</title>
    <script type ="text/javascript" >
    function passValue()
        document.getElementById ("HiddenField1").value=document.getElementById ("input1").value;

    <form id="form1" runat="server">
        <input type ="text" id="input1" />
        <asp:HiddenField ID ="HiddenField1" runat ="server" />
        <asp:Button ID="Button1" runat ="server" Text ="Button1" OnClientClick ="passValue()" />



2/26/2008 5:24:10 AM

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