为多语言ASP.NET MVC Web应用程序设置CurrentCulture的最佳位置

Question

对于多语言ASP.NET MVC 3 Web应用程序，我在控制器工厂确定Thread.CurrentThread.CurrentCulture和Thread.CurrentThread.CurrentUICulture如下：

public class MyControllerFactory : DefaultControllerFactory {

    protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext, Type controllerType) {

        //Get the {language} parameter in the RouteData
        string UILanguage;
        if (requestContext.RouteData.Values["language"] == null)
            UILanguage = "tr";
        else
            UILanguage = requestContext.RouteData.Values["language"].ToString();

        //Get the culture info of the language code
        CultureInfo culture = CultureInfo.CreateSpecificCulture(UILanguage);
        Thread.CurrentThread.CurrentCulture = culture;
        Thread.CurrentThread.CurrentUICulture = culture;

        return base.GetControllerInstance(requestContext, controllerType);
    }

}

上面的代码已经快一年了！所以，我愿意接受建议。

我在Global.asax文件上注册这个，如：

ControllerBuilder.Current.SetControllerFactory(new MyControllerFactory());

这样做很好，但我不确定这是否是做这种行为的最佳做法和最佳场所。

我没有挖到ControllerFactory的主要角色，我无法将它与ActionFilterAttribute进行比较。

你怎么看待这种行动的最佳地点？

Answer 1

我使用全球ActionFilter，但最近我意识到，在某些情况下，用OnActionExecuting方法设置当前文化为时已晚。例如，当POST请求后的模型进入控制器时，ASP.NET MVC会为模型创建元数据。它发生在执行任何操作之前。因此，DisplayName属性值，此时使用默认文化处理其他Data Annotations内容。

最终我将当前的文化设置为自定义的IControllerActivator实现，它就像一个魅力。我认为从请求生命周期的角度来看，在自定义控制器工厂中托管这个逻辑几乎是一样的，就像你今天一样。它比使用全球ActionFilter更可靠。

CultureAwareControllerActivator.cs：

public class CultureAwareControllerActivator: IControllerActivator
{
    public IController Create(RequestContext requestContext, Type controllerType)
    {
        //Get the {language} parameter in the RouteData
        string language = requestContext.RouteData.Values["language"] == null ?
            "tr" : requestContext.RouteData.Values["language"].ToString();

        //Get the culture info of the language code
        CultureInfo culture = CultureInfo.GetCultureInfo(language);
        Thread.CurrentThread.CurrentCulture = culture;
        Thread.CurrentThread.CurrentUICulture = culture;

        return DependencyResolver.Current.GetService(controllerType) as IController;
    }
}

的Global.asax.cs：

public class MvcApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        ...
        ControllerBuilder.Current.SetControllerFactory(new DefaultControllerFactory(new CultureAwareControllerActivator()));
    }
}

Answer 2

我知道anser已被选中。我们使用的选项是在Application的OnBeginRequest事件中初始化线程当前文化。这确保了每次请求都能发现文化

public void OnBeginRequest(object sender, EventArgs e)
{
   var culture = YourMethodForDiscoveringCulutreUsingCookie();
   System.Threading.Thread.CurrentThread.CurrentCulture = culture;
   System.Threading.Thread.CurrentThread.CurrentUICulture = culture;
}

Answer 3

另一个放置它的地方是将该代码放在自定义ActionFilter的OnActionExecuting方法中，该方法可以在GlobalFilters集合中注册：

http://weblogs.asp.net/gunnarpeipman/archive/2010/08/15/asp-net-mvc-3-global-action-filters.aspx

Answer 4

而不是覆盖OnActionExecuting你可以像这样覆盖Initialize

protected override void Initialize(RequestContext requestContext)
{
        string culture = null;
        var request = requestContext.HttpContext.Request;
        string cultureName = null;

        // Attempt to read the culture cookie from Request
        HttpCookie cultureCookie = request.Cookies["_culture"];
        if (cultureCookie != null)
            cultureName = cultureCookie.Value;
        else
            cultureName = request.UserLanguages[0]; // obtain it from HTTP header AcceptLanguages

        // Validate culture name
        cultureName = CultureHelper.GetValidCulture(cultureName); // This is safe

        if (request.QueryString.AllKeys.Contains("culture"))
        {
            culture = request.QueryString["culture"];
        }
        else
        {
            culture = cultureName;
        }

        Uitlity.CurrentUICulture = culture;

        base.Initialize(requestContext);
    }

Answer 5

如果不使用ControllerActivator，可以使用BaseController类和inhеrid。

public class BaseController : Controller
{
    public BaseController()
    {
          //Set CurrentCulture and CurrentUICulture of the thread
    }
}

---

public class HomeController: BaseController    
{
    [HttpGet]
    public ActionResult Index()
    {
        //..............................................
    }
}