ASP.NET Function called in JavaScript

Question

I'm trying to get CurrentUserLocale, and I get it server-side from my CodeBehind.

This is what I do :

    protected void Page_Load(object sender, EventArgs e)
    {
        lang = CultureInfo.CurrentCulture.TwoLetterISOLanguageName;
    [...]
    }

lang is a global stringvariable.

I have this function :

    public string getLang()
    {
        return lang;
    }

And in my JS code :

<script type="text/javascript">
    $(function () {
        var language = <%# getLang() %>;
        $("#datetimepickerdebut").datetimepicker({
            locale: language, // Eventuellement à modifier pour le multilingue
            showTodayButton: true,//Bouton d'accès rapide à la date-heure actuelle
            defaultDate: moment({h:0, m:0})/*Heure par defaut : le jour même à 00:00*/
        });
        $('#datetimepickerfin').datetimepicker({
            locale: language,
            showTodayButton: true,
            defaultDate: moment({h:23, m:59})
        });
    });
</script>

I've tried with <% GetLang(); %>, with <%= GetLang(); %>, with or without semi-colon. The calendar works well with locale:'fr' and when I set var language = 'fr'

Do you have any idea ?

Yann

Why don't you have a hidden field on the page that is populated with the lang value during the OnPageLoad event and just read the value from that field in the javascript code? — Luke Stoward
– Luke Stoward, Commented Aug 28, 2015 at 13:50

Community · Accepted Answer · 2017-05-23 11:52:09Z

3

$language = '<%= getLang() %>';

Notice the single quotes around it? You have to keep in mind that the value needs to be a string in the client side, so you need to put it within quotes.

The <%# %> syntax is for data binding, you would have to call bind on a parent object for that to work.

Alternatively, as Stoward94 suggests, you can use a hidden field.

//markup
<asp:HiddenField ID="LanguageHF" runat="server" ClientIdMode="static" />

//js    
$language = document.getElementById('LanguageHF').value;

//code behind   
LanguageHF.Value = CultureInfo.CurrentCulture.TwoLetterISOLanguageName;

edited May 23, 2017 at 11:52

CommunityBot

11 silver badge

answered Aug 28, 2015 at 13:51

mason

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LeReferee Over a year ago

Had to wait 7 minutes ;)

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