我可以从两个字符的语言代码创建一个新的 CultureInfo 吗？

Question

我需要根据文化格式化数字，但我只有来自 HTTP 请求的 Accept-Language，它是两个字母的代码，如 fr（法语）

这足以创建可以处理数字的 CultureInfo 吗？

Answer 1

是的，你可以。以下代码：

var ci = new CultureInfo("fr");
Console.WriteLine(13.45.ToString(ci));

输出“13,45”，它在数字中使用了法国小数点分隔符。

CultureInfo documentation 说：

A neutral culture is specified by only the two-letter lowercase language code. For example, fr specifies the neutral culture for French, and de specifies the neutral culture for German.

Answer 2

这是说明neutral cultures and specific cultures:

之间区别的注释

var language = "fr";

var c1 = new CultureInfo(language);
Console.WriteLine(c1.EnglishName);              // "French"
Console.WriteLine(c1.IsNeutralCulture);         // "True"
Console.WriteLine((3.14m).ToString("C", c1));   // "3,14 €"

var c2 = CultureInfo.CreateSpecificCulture(language);
Console.WriteLine(c2.EnglishName);              // "French (France)"
Console.WriteLine(c2.IsNeutralCulture);         // "False"
Console.WriteLine((3.14m).ToString("C", c2));   // "3,14 €"

var languageAndCountry = "fr-CA";

var c3 = new CultureInfo(languageAndCountry);
Console.WriteLine(c3.EnglishName);              // "French (Canada)"
Console.WriteLine(c3.IsNeutralCulture);         // "False"
Console.WriteLine((3.14m).ToString("C", c3));   // "3,14 $"

总而言之，如果你只有语言，你无法获得一切。您可以获得中立文化，或者选择 "typical" 国家/地区的 "canonical" 特定文化。

当您同时拥有语言和国家/地区时，如 "fr-CA"，情况会更好。

在我的系统上，存在以下具有 "fr" 的特定文化：

fr-029, fr-BE, fr-BF, fr-BI, fr-BJ, fr-BL, fr-CA, fr-CD, fr-CF, fr-CG, fr-CH, fr-CI, fr-CM, fr-DJ, fr-DZ, fr-FR, fr-GA, fr-GF, fr-GN, fr-GP, fr-GQ, fr-HT, fr-KM, fr-LU, fr-MA, fr-MC, fr-MF, fr-MG, fr-ML, fr-MQ, fr-MR, fr-MU, fr-NC, fr-NE, fr-PF, fr-PM, fr-RE, fr-RW, fr-SC, fr-SN, fr-SY, fr-TD, fr-TG, fr-TN, fr-VU, fr-WF, fr-YT

（通过 string.Join(", ", CultureInfo.GetCultures(CultureTypes.SpecificCultures).Where(x => x.TwoLetterISOLanguageName == "fr")) 找到）

我可以从两个字符的语言代码创建一个新的 CultureInfo 吗？

Can i create a new CultureInfo from a two-character language code?

c#

cultureinfo