ASP.NET(3):多语言实现

1.定义用户语言设置信息类，对用户选择的语言进行保存，可以用Session,这里选用的是Cookies.

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using CommonUtility;

/**//// <summary>
///ASPNET方式下为上下文语言环境提供语言设置对象
/// </summary>
public class ASPNETLocalizer : ILocalizer
{
    HttpContext httpContext;
    /**//// <summary>
    /// 创建对象
    /// </summary>
    /// <param name="httpResponse">HTTP相应对象</param>
    public ASPNETLocalizer()
    {
        this.httpContext = HttpContext.Current;
    }

    ILocalizer 成员#region ILocalizer 成员

    public string LocalizerName
    {
        get
        {
            //由于Cookies有Response.Request之分，所以需要在HttpContext上下文中保存语言信息
            if (httpContext.Items[CookiesCenter.Language] == null)
            {
                var localizerName = Cookies.ReadCookies(httpContext.Request, CookiesCenter.Language);
                if (String.IsNullOrEmpty(localizerName))
                {
                    localizerName = "zh-CN";
                    SetName(localizerName);
                }
                return localizerName;
            }
            else
            {
                return httpContext.Items[CookiesCenter.Language].ToString();
            }
        }
        set
        {
            SetName(value);
        }
    }

    /**//// <summary>
    /// 设置名称
    /// </summary>
    /// <param name="localizerName">语言名称</param>
    void SetName(string localizerName)
    {
        Cookies.WriteCookies(httpContext.Response, CookiesCenter.Language, localizerName);
        httpContext.Items[CookiesCenter.Language] = localizerName;
        System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo(localizerName);
        System.Threading.Thread.CurrentThread.CurrentCulture = ci;
        System.Threading.Thread.CurrentThread.CurrentUICulture = ci;
    }

    #endregion
}

由于对Cookies的访问有一定的限制，Request对象时候读,Response对象写，所以我们需要将用户选择语言的值保存在其它对象里面，可以保存在Session里，这里选择保存在HttpContext.Items中。

2.定义HttpModule，每次访问的时候根据用户的设置来改变语言

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using CommonUtility;

/// <summary>
///自定义向实现类提供模块初始化和处置事件。
/// </summary>
public class MYHttpModule : IHttpModule
{
    HttpApplication context;
    public PhenixHttpModule()
    {
     
    }

    #region IHttpModule 成员

    public void Dispose()
    {
        UnityContainer.ObjectProvider = null;
        context.PostAcquireRequestState -= new EventHandler(context_PostAcquireRequestState);
        
    }

    public void Init(HttpApplication context)
    {
        this.context = context; 
        context.PostAcquireRequestState += new EventHandler(context_PostAcquireRequestState);
    }

    void context_PostAcquireRequestState(object sender, EventArgs e)
    {
        var app = sender as HttpApplication;

        if (UnityContainer.ObjectProvider == null)
        {
            var provider = new ASPNETObjectProvider();
            UnityContainer.ObjectProvider = provider;
        }

        System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo(UnityContainer.GetObject<ILocalizer>().LocalizerName);
        System.Threading.Thread.CurrentThread.CurrentCulture = ci;
        System.Threading.Thread.CurrentThread.CurrentUICulture = ci;
    }

    #endregion
}

3.在Web.Config中添加记录

<httpModules>
      <add name="MYModule" type="MYHttpModule"/>
</httpModules>

4.定义资源文件存取对象ResourceManager

public class ResourceManager
{
    XElement ResourceManager;
    public Localizer()
    {
       //可以根据自己的需要处理资源文件的读取
        var culture = System.Threading.Thread.CurrentThread.CurrentCulture;

        var filepath = HttpContext.Current.Server.MapPath("~/App_Code/"+ culture.Name+"/lang.xml");
        xmlLocalizer = XElement.Load(filepath);
    }

    public Localizer()
        : this())
    {
    }

    public string GetString(string id)
    {
         return return xmlLocalizer.Descendants("resource").Where(p => p.Attribute("name").Value == id).Select(p1 => p1.Value).FirstOrDefault();
    }
}

5.在需要赋值的地方，实例化赋值即可

说明：初学ASP.NET,此方案很不成熟，自己练手用。