problem Radcombobox load on demand with Radcaptcha

[john mirzaei]

hi all
i have problem with requestItems() method in Radcombobox .it causes postback page and captcha generates new code but not shows it  to user .i searched forum and you suggest use RadXmlHttpPanel but how can i change this code :

<script type="text/javascript">
//global variables for the countries and cities comboboxes
var countriesCombo;
var citiesCombo;

function pageLoad()
{
    // initialize the global variables
    // in this event all client objects
    // are already created and initialized
    countriesCombo = $find("<%= RadComboBox2.ClientID %>");
    citiesCombo = $find("<%= RadComboBox3.ClientID %>");
}

function LoadCountries(sender, eventArgs)
{
    var item = eventArgs.get_item();
    countriesCombo.set_text("Loading...");
    citiesCombo.clearSelection();

    // if a continent is selected
    if (item.get_index() > 0)
    {
        // this will fire the ItemsRequested event of the
        // countries combobox passing the continentID as a parameter
        countriesCombo.requestItems(item.get_value(), false);
    }
    else
    {
        // the -Select a continent- item was chosen
        countriesCombo.set_text(" ");
        countriesCombo.clearItems();

        citiesCombo.set_text(" ");
        citiesCombo.clearItems();
    }
}

function LoadCities(sender, eventArgs)
{
    var item = eventArgs.get_item();

    citiesCombo.set_text("Loading...");
    // this will fire the ItemsRequested event of the
    // cities combobox passing the countryID as a parameter
    citiesCombo.requestItems(item.get_value(), false);
}

function ItemsLoaded(sender, eventArgs)
{
    if (sender.get_items().get_count() > 0) {
        // pre-select the first item
        sender.set_text(sender.get_items().getItem(0).get_text());
        sender.get_items().getItem(0).highlight();
    }

    sender.showDropDown();
}
        </script>

i don't want captcha changes code when items load on comboboxes?

thanks

[john mirzaei]

HI

I solved my problem by implementing a custom captcha validation and http handler...
http://www.telerik.com/community/forums/aspnet-ajax/captcha/radcaptcha-on-ajax-page.aspx

thanks

[Slav]

Hello John,

There is another option to prevent the change of the RadCaptcha code on Ajax request. You can use its property CaptchaImage-PersistCodeDuringAjax, which is designed especially for such scenarios. The following sample shows how to setup it:

<telerik:RadCaptcha runat="server" ID="RadCaptcha1" ErrorMessage="Wrong code" CaptchaImage-PersistCodeDuringAjax="true">
</telerik:RadCaptcha>

Greetings,
Slav
the Telerik team