国名改为ISO 3166-2代码

Question

我知道如何将ISO 3166-2代码转换成英文全名。使用RegionInfo将"US“改为"United States”。

然而，我如何才能做相反的事情，即拿“美国”而回“美国”呢？

Answer 1

//Get the cultureinfo
RegionInfo rInfo = new RegionInfo("us");
string s = rInfo.EnglishName;

//Convert it back
CultureInfo[] cultures = CultureInfo.GetCultures(CultureTypes.SpecificCultures);
 CultureInfo cInfo = cultures.FirstOrDefault(culture => new RegionInfo(culture.LCID).EnglishName == s);

Answer 2

主要思想:取所有区域对象，并从中选择一个包含给定全名的区域对象。

var regionFullNames = CultureInfo
                      .GetCultures( CultureTypes.SpecificCultures )
                      .Select( x => new RegionInfo(x.LCID) )
                      ;
var twoLetterName = regionFullNames.FirstOrDefault(
                       region => region.EnglishName.Contains("United States")
                    );

Answer 3

你可以这样做：

class CountryCodeMap
{
  private static Dictionary<string,string> map =
    CultureInfo
    .GetCultures(CultureTypes.AllCultures)
    .Where( ci => ci.ThreeLetterISOLanguageName != "ivl" )
    .Where( ci => !ci.IsNeutralCulture )
    .Select( ci => new RegionInfo(ci.LCID) )
    .Distinct()
    .ToDictionary( r => r.Name , r => r.EnglishName )
    ;

  public static string GetCountryName( string isoCountryCode )
  {
    string countryName ;
    bool found = map.TryGetValue( isoCountryCode, out countryName ) ;

    if ( !found ) throw new ArgumentOutOfRangeException("isoCountryCode") ;

    return countryName ;
  }

}