Question

I am using a user control and I need to call a popup, which asks a question, and I need to send the response (true or false) back to the user control that invokes the popup. I declared a hidden field to store the value in it from client-side so I can have access to it from the code behind and then execute further code. I have the following code:

ASP.Net

<script type="text/javascript">
        function confirmNoCallList() {
            debugger;
            var resp = confirm("¿Seguro/a que desea agregar a este subscriptor a la 
                       lista de 'No Llamar'?");

            window.opener.document.getElementById('hfAddToNoCallList').value = resp;
        }
</script>


<ajax:TabContainer ID="tbcMyProfile" runat="server" ActiveTabIndex="0" Width="500px">
        <ajax:TabPanel ID="tbpInfoCta" runat="server" HeaderText="Información de mi
                           Cuenta">
            <ContentTemplate>
                <asp:HiddenField ID="hfAddToNoCallList" runat="server" />
.
.
.

I am getting an error when the function hits the window.opener line. Any ideas on how to do this the right way?

Answer 1

You have to get the dynamic ClientID at runtime or pass it to a function and an arg that can then find it:

document.getElementById('<%= hfAddToNoCallList.ClientID"%>').value = resp;

or

   function confirmNoCallList(hiddenField) {
        debugger;
        var resp = confirm("¿Seguro/a que desea agregar a este subscriptor a la 
                   lista de 'No Llamar'?");

        document.getElementById(hiddenField).value = resp;
    }