CODE-jQuery Client-Side多國語系切換設計之Server端補充包

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.IO;

using System.Text.RegularExpressions;

using System.Web.Caching;

public class jQueryMultiLangAgent

{

    //文字對照表資料物件

    public class MultiLangData

    {

        public List<string> Languages;

        public Dictionary<string, int> IndexBook;

        public Dictionary<string, List<string>> TextDictionary;

    }

    //UI.htm的實體路徑

    public string LangFilePath;

    //對照表存於Cache中，發現不存在時就重新產生

    public MultiLangData Data

    {

        get

        {

            if (HttpContext.Current.Cache[LangFilePath] == null)

            {

                string html = File.ReadAllText(LangFilePath);

                //取出標記資料區塊

                #region Extract the part between <!-- BEGIN --> and <!-- END -->

                int x = html.IndexOf("<!-- BEGIN -->");

                int y = html.IndexOf("<!-- END -->");

                if (x == -1 || y == -1)

                    throw new ApplicationException(

                        string.Format("{0} is missing BEGIN/END mark!",

                        LangFilePath));

                html = html.Substring(x + 14, y - x - 14);

                #endregion

                Dictionary<string, List<string>> dictionary =

                    new Dictionary<string, List<string>>();

                Dictionary<string, int> index = new Dictionary<string, int>();

                //SelectChildElements, GetInnerHTML用Regex解析tr, th, td等元素內容取值

                List<string> trs = SelectChildElements(html, "tr");

                //取得全部的語系代碼，最前面的當成預設語系

                List<string> langs = SelectChildElements(trs.First(), "th").Skip(2)

                                    .Select(o => GetInnerHTML(o)).ToList();

                foreach (string lang in langs)

                    dictionary.Add(lang, new List<string>());

                int count = 0;

                foreach (string tr in trs.Skip(1))

                {

                    List<string> tdHtmls = SelectChildElements(tr, "td").Skip(2)

                                           .Select(o => GetInnerHTML(o)).ToList();

                    //最前面的文字欄位為預設語系

                    if (index.ContainsKey(tdHtmls[0]))

                        throw new ApplicationException("Duplicated Text - " + tdHtmls[0]);

                    //記錄索引位置，未來用Dictionary以文字查出位置

                    index.Add(tdHtmls[0], count++);

                    //逐一放入各語系文字

                    for (int i = 0; i < langs.Count; i++)

                        dictionary[langs[i]].Add(tdHtmls[i]);

                }

                //將資料物件存入Cache，並與檔案設定相依性

                HttpContext.Current.Cache.Add(LangFilePath, new MultiLangData()

                {

                    Languages = langs,

                    IndexBook = index,

                    TextDictionary = dictionary

                }, new System.Web.Caching.CacheDependency(LangFilePath),

                Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration,

                CacheItemPriority.High, null

                );

            }

            return HttpContext.Current.Cache[LangFilePath] as MultiLangData;

        }

    }

    #region Language Options

    //所有可用語系清單

    public List<string> Languages

    {

        get { return Data.Languages; }

    }

    private string currLang = "NA";

    //目前指定語系

    public string CurrentLanguage

    {

        get { return currLang; }

        set {

            if (!Languages.Contains(value))

                throw new ApplicationException(

                    "Language " + value + " not defined!");

            currLang = value;

        }

    }

    #endregion

    //將預設語系文字轉為目前指定語系文字，支援string.Format

    public string MapText(string text, params object[] args)

    {

        if (!Data.IndexBook.ContainsKey(text))

            throw new ApplicationException(

                "'" + text + "' not found in default language.");

        return string.Format(

            Data.TextDictionary[CurrentLanguage][Data.IndexBook[text]], args);

    }

    //建構式，指定UI.htm，取得預設語系時會觸發UI.htm解讀程序

    public jQueryMultiLangAgent(string langHtmlPath)

    {

        LangFilePath = HttpContext.Current.Server.MapPath(langHtmlPath);

        CurrentLanguage = Languages[0];

    }

    #region Parser Utility

    private static List<string> SelectChildElements(string html, string tag)

    {

        List<string> lst = new List<string>();

        foreach (Match m in Regex.Matches(html, string.Format("<{0}>.*?</{0}>", tag),

            RegexOptions.Singleline | RegexOptions.IgnoreCase))

            lst.Add(m.Value);

        return lst;

    }

    private static string GetInnerHTML(string html)

    {

        int st = html.IndexOf(">") +1, ed = html.LastIndexOf("<");

        return html.Substring(st, ed - st).Trim(' ', '\r', '\n');

    }

    #endregion

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class MultiLang_UI : System.Web.UI.Page

{

    jQueryMultiLangAgent mlAgent = new jQueryMultiLangAgent(

        "UI.lang.htm");

    string demoString = "員工姓名有無效字元: {0}";

    private void showText()

    {

        mlAgent.CurrentLanguage = ddlLangs.SelectedItem.ToString();

        lblText.Text = mlAgent.MapText(demoString, "SUCC");

    }

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

            ddlLangs.DataSource = mlAgent.Languages;

            ddlLangs.DataBind();

            showText();

        }

    }

    protected void btnSwitch_Click(object sender, EventArgs e)

    {

        showText();

    }

}