How to set a hidden value field from a control event in a Grid

[Jaime]

Hello...

I have a Grid whose columns contains controls, for example, a RadMasketTextBox control. I implemented the TextChanged of that control to set the value of a hidden field to "true".

The problem is that I want to read that hidden field from a JavaScript. Is it possible to do it? I tried with RadAjaxManager, with this settings:

<rad:RadAjaxManager ID="ajaxManager" runat="server">
    <AjaxSettings>
        <rad:AjaxSetting AjaxControlID="gdvPeriodos">
            <UpdatedControls>
                <rad:AjaxUpdatedControl ControlID="gdvPeriodos" />
                <rad:AjaxUpdatedControl ControlID="hidModificado" />
            </UpdatedControls>
        </rad:AjaxSetting>
    </AjaxSettings>
</rad:RadAjaxManager>
<asp:HiddenField ID="hidModificado" Value="false" runat="server" />

When the JavaScript function executed the following command:

var serverModifiedFlag = eval(document.getElementById('hidModificado').value);

always "false" is returned, even when I modify the hidden value from a Grid event in codebehind.

Any help will be appreciated
Thanks

Jaime

[Maria Ilieva]

Hi Jaime,

Please note that it is not supported scenario to add invisible controls into RadAjaxManager settings. Note that all controls added as Ajax initiators or target controls would be always visible on the page. Therefore I would suggest you to wrap the hidden input into always visible container and add this container in the AjaxManager settings.  

Regards,
Maria Ilieva
the Telerik team