How to assign hiddenfield value to a javascript function at design

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Hi,

I have a ASP Label on my page, and a hidden input field following my label.
My label has 'onclick' event attached with a javascript function which takes a single argument.
Now I want to assign/pass value of hidden field into javascript function while "Asp:Label" definition.

I'm just trying something like this:

XML

<asp:Label ID="lbl1" runat="server" Text="" Visible="true" onclick="changePage('<%=hid1201.Value%>')" meta:resourcekey="lbl1Resource1"></asp:Label>
                                                    <asp:HiddenField  runat="server" ID="hid1201" />

I'm unable to get the result, can anybody help me out.

Thanks in advance.

Sri.

Posted 15-Nov-10 0:36am

Sri9797

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Ed Guzman · Answer 1 · 2010-11-15T05:51:00

As you already noticed the asp:Label does not have "onClick" client side event.
So the best way to handle this is to use JQuery, which has already become the standard JavaScript framework for many companies including Microsoft.

Try this code, it works.

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>
<!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">
    <title></title>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
</head>
<body>
    <form id="form1" runat="server">
    <asp:Label ID="lbl1" runat="server" Text="My Label Text"></asp:Label>
    <asp:HiddenField runat="server" ID="hid1201" Value="My Hidden Value" />
    </form>

    <script language="javascript" type="text/javascript">
        $(document).ready(function () {
            $("#<%=lbl1.ClientID %>").click(function () {
                alert($("#<%=hid1201.ClientID %>").val());
            });
        });
</script>
</body>
</html>

Good luck.

Renjith.K.C · Answer 2 · 2010-11-15T01:02:00

Hi Sri,
Please try the below code.

XML

<asp:HiddenField  runat="server" ID="hid1201"/>
  <asp:Label ID="lbl1" runat="server" Text="" Visible="true" onclick="changePage('hid1201')" meta:resourcekey="lbl1Resource1">Label</asp:Label>

XML

<script language="javascript" type="text/javascript">
      function changePage(hiddenFieldID) {
          alert(document.getElementById(hiddenFieldID).value);
      }
  </script

>

thatraja · Answer 3 · 2010-11-15T01:27:00

I think your page will be a content page which is using masterpage.

XML

<asp:Label ID="lbl1" runat="server" Text="" Visible="true" onclick="changePage('<%= hid1201.ClientID %>')"></asp:Label>
<asp:HiddenField  runat="server" ID="hid1201" />

XML

<script language="javascript" type="text/javascript">
      function changePage(PageID) 
      {
          alert(document.getElementById(PageID).value);
      }
</script>

Careful with IDs & take a look at this post[^]

How to assign hiddenfield value to a javascript function at design

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