How to get the value hidden control of user control in .aspx page

How to get the value hidden control of user control in .aspx page




1/9/2009 1:47:19 PM 93655 articles. 6 followers. Follow

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 If its a server control (runat attribute = server) and its markup starts with <asp:HiddenField ID="HiddenField1">, you can just call HiddenField1.Value to get the value stored in it. Even if your hidden field is not a standard control you can still retrieve the value provided the runat attribute is set to server.

Hope this helps Yes

programming blog
1/9/2009 2:07:27 PM
Use <%=testhid.ClientId%>

For example getting a reference to the object would look like:

var testid = document.getElementById("<%=testhid.ClientId%>")

object.ClientId returns what the actual html id of the control will be.  This ID can be variable based on the control hierarchy and parent controls.


~ Please Mark as Answer if it solves your query ~
1/9/2009 2:14:15 PM

How to get the value hidden control of user control in .aspx page

If the HiddenField control resides within a UserControl then you can use FindControl method to access it like below:


        HiddenField hidden = (HiddenField)UserControl1.FindControl("HiddenField1");
        if (hidden != null)
            string value = hidden.Value.ToString();

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How to get your Forum Question Answered | Blog | CodeASP.NET
1/9/2009 2:19:02 PM

Example showing below, simply expose the hidden field's value attribute as a property for flexibility.

ASPX page:


<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Register src="~/usercontrols/WebUserControl1.ascx" TagPrefix="uc" TagName="UCMyControl" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
<html xmlns="" >
<head runat="server">
<form id="form1" runat="server">
<uc:UCMyControl runat="server" id="ucMyControl" HiddenFieldValue="test" />
<br />
<span onclick="checkHiddenFieldValue()">Click here to check hidden value</span>
<script type="text/javascript">
// here's how to get from client side
function checkHiddenFieldValue()
var hid = document.getElementById('<%=ucMyControl.HiddenFieldClientId %>');
if (hid)

ASCX page:

<%@ Control Language="C#" AutoEventWireup="true" %>
<script runat="server" type="text/C#">
public string HiddenFieldValue
get { return hidSomeValue.Value; }
set { hidSomeValue.Value = value; }

public string HiddenFieldClientId
get { return hidSomeValue.ClientID; }

protected override void OnLoad(EventArgs e)
litOutput.Text = HiddenFieldValue;
<asp:HiddenField runat="server" ID="hidSomeValue" />
<asp:Literal runat="server" ID="litOutput" />

Jack Yang
.NET Developer
1/9/2009 2:30:33 PM

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