how to pass the selected culture into InitializeCulture() method

Question

I have a login page where the user can select his language through a radio button, after login the user is redirected to Default.aspx where I'm using the below method to set the page culture:

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default"%>
<%@ Import Namespace="System.Resources" %>
<% @Import Namespace="System.Globalization" %>
<% @Import Namespace="System.Threading" %>
<script runat=server>
        protected override void InitializeCulture()
        {
            Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture(Session["lang"].ToString());
            Thread.CurrentThread.CurrentUICulture = new CultureInfo(Session["lang"].ToString());
            base.InitializeCulture();
        }
</script>

How can I pass the selected language from the login page to this method in Default.aspx page? I tried to pass it through session but I got this error:

System.NullReferenceException: 'Object reference not set to an instance of an object.' System.Web.SessionState.HttpSessionState.this[string].get returned null.

Because this method happens in early stages before any control or session is initiated, that's why it returns null. Any idea how can I pass the selected culture to this method?

Check out this question : https://stackoverflow.com/questions/7000509/how-to-change-currentculture-at-runtime — Srikanth, May 29 '17 at 03:40

score 0 · Answer 1 · answered May 29 '17 at 01:42

0

Where in your code is "lang" loaded into Session?

I believe this is telling you that "lang" doesn't exist in SessionState vs. that SessionState itself is not available.

answered May 29 '17 at 01:42

Joshua Mason

11
3

in page_load, but the problem is that this method InitializeCulture() runs before the page_load, so the session is always empty. – Mohammad AlShaabi May 29 '17 at 11:12
Try..Catch block doesn't really do anything because it seems like the exception is actually coming from Visual Studio itself. Here are the odd behaviors: - If I just run the code it works fine – Joshua Mason Apr 08 '19 at 06:17

score 0 · Answer 2 · answered May 29 '17 at 03:04

Are you setting it as a default or allowing the user to choose it?

If the former then just put this in your App.xaml.cs:

[assembly: NeutralResourcesLanguage("en-US")]

Could also do something like this if you worried about thread culture:

var culture = CultureInfo.CreateSpecificCulture("en-US");

if (Thread.CurrentThread.CurrentCulture.Name != "en-US")
{
    var culture = CultureInfo.CreateSpecificCulture("en-US");
    CultureInfo.DefaultThreadCurrentCulture = culture;
    CultureInfo.DefaultThreadCurrentUICulture = culture;
}

I'm allowing the user to do it, it is easy for me to set it as default in many ways. thanks for your reply. — Mohammad AlShaabi, May 29 '17 at 11:09

score 0 · Answer 3 · answered May 29 '17 at 03:43

Change Culture of a webpage as in MSDN

<%@ Page Language="C#" uiculture="auto" %>
<%@ Import Namespace="System.Threading" %>
<%@ Import Namespace="System.Globalization" %>
<script runat="server">
protected override void InitializeCulture()
{
    if (Request.Form["ListBox1"] != null)
    {
        String selectedLanguage = Request.Form["ListBox1"];
        UICulture = selectedLanguage ;
        Culture = selectedLanguage ;

        Thread.CurrentThread.CurrentCulture = 
            CultureInfo.CreateSpecificCulture(selectedLanguage);
        Thread.CurrentThread.CurrentUICulture = new 
            CultureInfo(selectedLanguage);
    }
    base.InitializeCulture();
}
</script>

I tried this several times and it never changes the culture to the selected one, it always gives me the OS current culture no matter what. thanks for your reply. — Mohammad AlShaabi, May 29 '17 at 11:10
Have a look at this https://www.codeproject.com/Articles/18753/Developing-an-ASP-NET-page-with-MasterPage-and-Loc — Srikanth, May 30 '17 at 03:27

score 0 · Accepted Answer · answered May 29 '17 at 18:57

I found the answer, I managed to pass the selected culture info using Query String:

in my login page I have those two radio buttons and a button:

<asp:RadioButton ID="RadioButton1" runat="server" Text="ar-AE" />
<asp:RadioButton ID="RadioButton2" runat="server" Text="en-US" />
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />

in the code behind the button OnClick:

protected void Button1_Click(object sender, EventArgs e)
    {
        if (RadioButton1.Checked)
        {
            Response.Redirect("Default.aspx?language=" + RadioButton1.Text);
        }
        else
        {
            Response.Redirect("Default.aspx?language=" + RadioButton2.Text);
        }
    }

then in Default.aspx page I have this code:

<% @Import Namespace="System.Resources" %>
<% @Import Namespace="System.Globalization" %>
<% @Import Namespace="System.Threading" %>
<script runat=server>
    protected override void InitializeCulture()
    {
        Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture(Request.QueryString["language"].ToString());
        Thread.CurrentThread.CurrentUICulture = new CultureInfo(Request.QueryString["language"].ToString());
        base.InitializeCulture();
    }
</script>

I tried to use Cookie also but it returns null as well like the session, so the query string is the only way that worked for me.

how to pass the selected culture into InitializeCulture() method

4 Answers4