Question

How to keep a drop down list value in aspx for globalization of language?

Asked by: techques

I use the following c# code to handle the multiple languages:

       public const string LanguageDropDownName = "ctl00$cphHeader$header$ddlLanguage";

        public const string PostBackEventTarget = "__EVENTTARGET";

        protected override void InitializeCulture()
        {
            if (Request[PostBackEventTarget] != null)
            {
                string controlID = Request[PostBackEventTarget];

                if (controlID.Equals(LanguageDropDownName))
                {
                    string selectedValue = Request.Form[Request[PostBackEventTarget]].ToString();

                    switch (selectedValue)
                    {
                        case "0": SetCulture("zh-CHT");
                            break;
                        case "1": SetCulture("zh-CHS");
                            break;
                        default: break;
                    }
                }
            }
            else
            {
                SetCulture("zh-CHT");
            }

            if (Session["MyUICulture"] != null)
            {
                Thread.CurrentThread.CurrentUICulture = (CultureInfo)Session["MyUICulture"];
            }
            base.InitializeCulture();
        }

        protected void SetCulture(string name)
        {
            Thread.CurrentThread.CurrentUICulture = new CultureInfo(name);
            Session["MyUICulture"] = Thread.CurrentThread.CurrentUICulture;
        }

In header.ascx

<asp:DropDownList ID="ddlLanguage" CssClass="ddlLanguage" runat="server" AutoPostBack="True">
        <asp:ListItem Value="0">Big5</asp:ListItem>
        <asp:ListItem Value="1">GB2312</asp:ListItem>
    </asp:DropDownList>

When I select a language in the drop down, it can convert to that language.

However, when I click other aspx pages, it returns to the Big5 language.

And, how can the C# code check the browser default encoding and update the drop down list value in order to show the proper language?

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Asked On
2009-11-03 at 08:43:20ID24867747
Tags

aspx

,

c#

Topics

Microsoft Visual C#.Net

,

Programming for ASP.NET

Participating Experts
1
Points
50
Comments
3

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Answers

 

by: PsyberionPosted on 2009-11-03 at 09:29:23ID: 25731323

You could use the viewstate to maintain the selected value of the dropdown:

<asp:DropDownList ID="ddlLanguage" CssClass="ddlLanguage" runat="server" EnableViewstate="True" AutoPostBack="True">

 

by: techquesPosted on 2009-11-04 at 04:11:37ID: 25738504

do you have C# code example for all aspx pages to keep the viewstate?

 

by: PsyberionPosted on 2009-11-04 at 04:37:07ID: 25738661

Well it can be specified in the .aspx header I think, so it's not C# or VB specific, by adding EnableViewState="true" like so:

<%@ Page Language="vb" AutoEventWireup="false" EnableViewState="true" CodeBehind="Default.aspx.vb" Inherits="dropdown._Default" %>

You have to add EnableViewState="true" to the Page tag of each aspx page, but I think in doing that it covers all of the controls on the page, unless a control has EnbaleViewState="false" explicitly, like <asp:textbox id="tb1" runat="server" EnbaleViewState="false"/>

20120131-EE-VQP-002

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