本地化的ASP.NET的WebAPI异步调用 [英] Localization for async calls in ASP.NET WebApi

问题描述

您好，我正打算以处理服务器端的本地化错误字符串等。接受语言头，通过设置基于标头的CurrentUICulture，但显然它不流动虽然异步调用，下面是一个示例code来说明这个问题，有没有处理的国产化，为异步调用任何默认方式？

Hi– I'm planning to handle server side localization for error strings etc. based on the "Accept-Language" header, by setting the CurrentUICulture based on that header, but apparently it doesn’t flow though the async calls, below is a sample code to illustrate the problem, is there any default way of handling the localization for async calls?

   public async Task<HttpResponseMessage> GetAsync()
    {            
        //set the current ui culture, to say "fr-FR", based on "Accept-Language" header
        Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo("**fr-FR**");  

       var task = httpClient.PutAsync(endpoint, content)            

        //do some processing

        var res  = await task;

        var culture = Thread.CurrentThread.CurrentUICulture.Name; **//ITS NOT necessarily fr-FR**

        //do some more processing
        //and handle localizations etc.

        return res;
    }

我在寻找处理对那里有真正的异步操作ESP的情况下定位的清洁剂/无缝的方式。为code以下的调用的await

I'm looking for a cleaner/seamless way of handling localization for cases where there are real async operations esp. for the code following the await call

编辑：更换Task.Run（）与httpClient.PutAsync为清楚起见

replaced Task.Run() with httpClient.PutAsync for clarity

推荐答案

Task.Run 和 Task.Factory.StartNew 没有任何背景。这是一个预期的行为。 Context是preserved当您使用的await 关键字。因此，这里是你可以做什么：

Task.Run and Task.Factory.StartNew do not have any context. That's an expected behavior. Context is preserved when you use the await keyword. So here's what you could do:

public static async Task<IEnumerable<string>> GetAsync()
{            
    //set the current ui culture, to say "fr-FR", based on "Accept-Language" header
    Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo("fr-FR");

    //do some processing

    var s = await GetSomething();

    var culture = Thread.CurrentThread.CurrentUICulture.Name; //It's ja-JP

    return new[] { s, s };
}

public static Task<string> GetSomething()
{
    var cuture = Thread.CurrentThread.CurrentUICulture.Name; // It's fr-FR
    var tcs = new TaskCompletionSource<string>();
    Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo("ja-JP");
    tcs.SetResult("<something>");
    return tcs.Task;
}

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