在 C# 中，是否可以从 3 个字符的货币代码（在本例中为“GBP”）获取货币符号，例如“£”？
这在 SQL Server 或 C# 中是否可行？
【问题讨论】：
RegionInfo可以使用ISO 2字符代码。
标签： c# .net sql-server-2008 currency
虽然有点蛮力而且不是特别优雅，但您可以这样做：
public bool TryGetCurrencySymbol(string ISOCurrencySymbol, out string symbol)
{
symbol = CultureInfo
.GetCultures(CultureTypes.AllCultures)
.Where(c => !c.IsNeutralCulture)
.Select(culture => {
try{
return new RegionInfo(culture.Name);
}
catch
{
return null;
}
})
.Where(ri => ri!=null && ri.ISOCurrencySymbol == ISOCurrencySymbol)
.Select(ri => ri.CurrencySymbol)
.FirstOrDefault();
return symbol != null;
}
并按如下方式使用：
string currSymbol;
if(TryGetCurrencySymbol("GBP",out currSymbol))
{
Console.WriteLine("symbol is {0}", currSymbol);
}
如果您预计会采用这种方法，那么最好先构建一个缓存：
public static class CurrencyTools
{
private static IDictionary<string,string> map;
static CurrencyTools()
{
map = CultureInfo
.GetCultures(CultureTypes.AllCultures)
.Where(c => !c.IsNeutralCulture)
.Select(culture => {
try{
return new RegionInfo(culture.Name);
}
catch
{
return null;
}
})
.Where(ri => ri!=null)
.GroupBy(ri => ri.ISOCurrencySymbol)
.ToDictionary(x => x.Key, x => x.First().CurrencySymbol);
}
public static bool TryGetCurrencySymbol(
string ISOCurrencySymbol,
out string symbol)
{
return map.TryGetValue(ISOCurrencySymbol,out symbol);
}
}
在撰写本文时，在我的机器等上，地图包含以下映射：
AED د.إ.
AFN ؋
ALL Lekë
AMD ֏
ANG NAf.
AOA Kz
ARS $
AUD $
AWG Afl.
AZN ₼
BAM КМ
BBD $
BDT ৳
BGN лв.
BHD د.ب.
BIF FBu
BMD $
BND $
BOB Bs
BRL R$
BSD $
BTN Nu.
BWP P
BYN Br
BZD $
CAD $
CDF FC
CHF CHF
CLP $
CNY ¥
COP $
CRC ₡
CUP $
CVE
CZK Kč
DJF Fdj
DKK kr.
DOP $
DZD د.ج.
EGP ج.م.
ERN Nfk
ETB Br
EUR €
FJD $
FKP £
GBP £
GEL ₾
GHS GH₵
GIP £
GMD D
GNF FG
GTQ Q
GYD $
HKD $
HNL L
HRK kn
HTG G
HUF Ft
IDR Rp
ILS ₪
INR ₹
IQD د.ع.
IRR ريال
ISK kr
JMD $
JOD د.ا.
JPY ¥
KES Ksh
KGS сом
KHR ៛
KMF CF
KPW ₩
KRW ₩
KWD د.ك.
KYD $
KZT ₸
LAK ₭
LBP ل.ل.
LKR රු.
LRD $
LYD د.ل.
MAD د.م.
MDL L
MGA Ar
MKD ден
MMK K
MNT ₮
MOP MOP$
MRU MRU
MUR Rs
MVR ރ.
MWK MK
MXN $
MYR RM
MZN MTn
NAD $
NGN ₦
NIO C$
NOK kr
NPR रु
NZD $
OMR ر.ع.
PAB B/.
PEN S/
PGK K
PHP ₱
PKR Rs
PLN zł
PYG ₲
QAR ر.ق.
RON lei
RSD дин.
RUB ₽
RWF RF
SAR ر.س.
SBD $
SCR SR
SDG ج.س.
SEK kr
SGD $
SHP £
SLL Le
SOS S
SRD $
SSP £
STN Db
SYP ل.س.
SZL E
THB ฿
TJS смн
TMT m.
TND د.ت.
TOP T$
TRY ₺
TTD $
TWD NT$
TZS TSh
UAH ₴
UGX USh
USD $
UYU $
UZS сўм
VES Bs.S
VND ₫
VUV VT
WST WS$
XAF FCFA
XCD EC$
XDR XDR
XOF CFA
XPF FCFP
YER ر.ي.
ZAR R
ZMW K
【讨论】：
.NET 有CultureInfo.NumberFormat.CurrencySymbol
CultureInfo us = new CultureInfo("en-US");
CultureInfo gb = new CultureInfo("en-GB");
CultureInfo fr = new CultureInfo("fr-FR");
Console.Out.WriteLine(us.NumberFormat.CurrencySymbol); // $
Console.Out.WriteLine(gb.NumberFormat.CurrencySymbol); // £
Console.Out.WriteLine(fr.NumberFormat.CurrencySymbol); // €
但这需要文化名称，而不是"GBP"。据我所知，直接来自"GBP" 等是不可能的。
同样的信息也可以通过RegionInfo获得，以及货币代码：
RegionInfo us = new RegionInfo("en-US");
RegionInfo gb = new RegionInfo("en-GB");
RegionInfo fr = new RegionInfo("fr-FR");
Console.Out.WriteLine(us.CurrencySymbol); // $
Console.Out.WriteLine(gb.CurrencySymbol); // £
Console.Out.WriteLine(fr.CurrencySymbol); // €
Console.Out.WriteLine(us.ISOCurrencySymbol); // USD
Console.Out.WriteLine(gb.ISOCurrencySymbol); // GBP
Console.Out.WriteLine(fr.ISOCurrencySymbol); // EUR
我想人们可以使用它来构建从 ISO 代码到符号的映射。
文化名称列表可用here。
编辑：这似乎可行：
public static class CurrencyCodeMapper
{
private static readonly Dictionary<string, string> SymbolsByCode;
public static string GetSymbol(string code) { return SymbolsByCode[code]; }
static CurrencyCodeMapper()
{
SymbolsByCode = new Dictionary<string, string>();
var regions = CultureInfo.GetCultures(CultureTypes.SpecificCultures)
.Select(x => new RegionInfo(x.LCID));
foreach (var region in regions)
if (!SymbolsByCode.ContainsKey(region.ISOCurrencySymbol))
SymbolsByCode.Add(region.ISOCurrencySymbol, region.CurrencySymbol);
}
}
用法：
CurrencyCodeMapper.GetSymbol("USD") // $
CurrencyCodeMapper.GetSymbol("GBP") // £
CurrencyCodeMapper.GetSymbol("EUR") // €
当然，请注意，这不会产生一个完整的列表。特别是，它不包括已被欧元取代的旧欧元区货币。我看不到任何解决方法，只能在需要时手动添加此类货币，例如 SymbolsByCode.Add("FRF", "₣"); 表示法郎。
【讨论】：
ArgumentException: Customized cultures cannot be passed by LCID, only by name.Parameter name: culture。简单的解决方法是将.LCID 替换为.Name。似乎工作。
RegionInfo 类有一个CurrencySymbol property，所以它在 C# 中是可行的。如果您想在 Sql Server 中执行此操作，或许可以使用 C# 存储过程。
RegionInfo regionInfo = new RegionInfo("GB");
Console.WriteLine(regionInfo.CurrencySymbol); // £
（您需要使用ISO country codes）
【讨论】：
这不适用于 Windows Phone 应用程序，因为CultureInfo.GetCultures 在平台上不可用（至少目前还没有）。因此，这是一个快速而肮脏的解决方案 - 在花费者的答案的帮助下完成，其中包含日期的所有文化代码和货币。
public static class CurrencyHelper
{
public static string GetCurrencySymbol(string code)
{
if (Currencies.ContainsKey(code))
{
return Currencies[code];
}
else
{
return code;
}
}
public static Dictionary<string, string> Currencies = new Dictionary<string, string>() {
{"AED", "د.إ."},
{"AFN", "؋ "},
{"ALL", "Lek"},
{"AMD", "դր."},
{"ARS", "$"},
{"AUD", "$"},
{"AZN", "man."},
{"BAM", "KM"},
{"BDT", "৳"},
{"BGN", "лв."},
{"BHD", "د.ب. "},
{"BND", "$"},
{"BOB", "$b"},
{"BRL", "R$"},
{"BYR", "р."},
{"BZD", "BZ$"},
{"CAD", "$"},
{"CHF", "fr."},
{"CLP", "$"},
{"CNY", "¥"},
{"COP", "$"},
{"CRC", "₡"},
{"CSD", "Din."},
{"CZK", "Kč"},
{"DKK", "kr."},
{"DOP", "RD$"},
{"DZD", "DZD"},
{"EEK", "kr"},
{"EGP", "ج.م. "},
{"ETB", "ETB"},
{"EUR", "€"},
{"GBP", "£"},
{"GEL", "Lari"},
{"GTQ", "Q"},
{"HKD", "HK$"},
{"HNL", "L."},
{"HRK", "kn"},
{"HUF", "Ft"},
{"IDR", "Rp"},
{"ILS", "₪"},
{"INR", "रु"},
{"IQD", "د.ع. "},
{"IRR", "ريال "},
{"ISK", "kr."},
{"JMD", "J$"},
{"JOD", "د.ا. "},
{"JPY", "¥"},
{"KES", "S"},
{"KGS", "сом"},
{"KHR", "៛"},
{"KRW", "₩"},
{"KWD", "د.ك. "},
{"KZT", "Т"},
{"LAK", "₭"},
{"LBP", "ل.ل. "},
{"LKR", "රු."},
{"LTL", "Lt"},
{"LVL", "Ls"},
{"LYD", "د.ل. "},
{"MAD", "د.م. "},
{"MKD", "ден."},
{"MNT", "₮"},
{"MOP", "MOP"},
{"MVR", "ރ."},
{"MXN", "$"},
{"MYR", "RM"},
{"NIO", "N"},
{"NOK", "kr"},
{"NPR", "रु"},
{"NZD", "$"},
{"OMR", "ر.ع. "},
{"PAB", "B/."},
{"PEN", "S/."},
{"PHP", "PhP"},
{"PKR", "Rs"},
{"PLN", "zł"},
{"PYG", "Gs"},
{"QAR", "ر.ق. "},
{"RON", "lei"},
{"RSD", "Din."},
{"RUB", "р."},
{"RWF", "RWF"},
{"SAR", "ر.س. "},
{"SEK", "kr"},
{"SGD", "$"},
{"SYP", "ل.س. "},
{"THB", "฿"},
{"TJS", "т.р."},
{"TMT", "m."},
{"TND", "د.ت. "},
{"TRY", "TL"},
{"TTD", "TT$"},
{"TWD", "NT$"},
{"UAH", "₴"},
{"USD", "$"},
{"UYU", "$U"},
{"UZS", "so'm"},
{"VEF", "Bs. F."},
{"VND", "₫"},
{"XOF", "XOF"},
{"YER", "ر.ي. "},
{"ZAR", "R"},
{"ZWL", "Z$"} };
}
【讨论】：
试试这个代码。输入“USD”作为 CurrencyCode 和所有其他。
public string getCurrencySymbol(string CurrencyCode)
{
string symbol = string.Empty;
CultureInfo[] cultures = CultureInfo.GetCultures(CultureTypes.SpecificCultures);
IList Result = new ArrayList();
foreach (CultureInfo ci in cultures)
{
RegionInfo ri = new RegionInfo(ci.LCID);
if (ri.ISOCurrencySymbol == CurrencyCode)
{
symbol = ri.CurrencySymbol;
return symbol;
}
}
return symbol;
}
【讨论】：
在这个帖子的帮助下，我做了一个短字符串扩展方法
public static string ToCurrencySymbol(this string ISOCurrency)
{
RegionInfo region = CultureInfo.GetCultures(CultureTypes.SpecificCultures).Select(x => new RegionInfo(x.LCID)).FirstOrDefault(p => p.ISOCurrencySymbol == ISOCurrency);
return region?.ISOCurrencySymbol ?? ISOCurrency;
}
【讨论】：
return region?.ISOCurrencySymbol ?? ISOCurrency; 应更改为 return region?.CurrencySymbol ?? ISOCurrency;，因为 ISOCurrencySymbol 返回 3 位货币代码
这个答案将@spender 的代码（稍加调整）放在一个实用程序类中，该类尝试将三字母 ISO 货币代码转换为其当前流通的符号。为了提高效率，这个类使用了所有先前请求的内部缓存，@spender 也建议这样做。
public static class CurrencySymbolMapper {
/// <summary>An internal cache of previously looked up currencies.</summary>
private static Dictionary<string, string> _currencySymbolsCache =
new Dictionary<string, string> (StringComparer.CurrentCultureIgnoreCase);
public static string TryGetCurrencySymbol(string threeLetterISOAlphabeticCode) {
// TODO: Enhance to get rid of the silent exception that gets thrown when constructing a new RegionInfo(CultureInfo.LCID) temporary object
if (threeLetterISOAlphabeticCode.Length != 3) return string.Empty;
if (_currencySymbolsCache.ContainsKey(threeLetterISOAlphabeticCode))
return _currencySymbolsCache[threeLetterISOAlphabeticCode];
string currencySymbolSearchResult = string.Empty;
try {
currencySymbolSearchResult =
CultureInfo.GetCultures(CultureTypes.AllCultures)
.Where(c => !c.IsNeutralCulture)
.Select(culture => {
try { return new RegionInfo(culture.LCID); }
catch { return null; } // Ignore this error, but enhance future implementation to get ride of this silent exception
})
.Where(ri => ri != null && string.Equals(ri.ISOCurrencySymbol, threeLetterISOAlphabeticCode, StringComparison.OrdinalIgnoreCase))
.Select(ri => ri.CurrencySymbol)
.FirstOrDefault();
}
catch (Exception e) {
// TODO: Handle error
}
if (currencySymbolSearchResult == null) currencySymbolSearchResult = string.Empty;
// Saves both valid and invalid search results, just in case users hammer this method with
// the same invalid request many times
_currencySymbolsCache.Add(threeLetterISOAlphabeticCode, currencySymbolSearchResult);
return currencySymbolSearchResult;
}
}
【讨论】：
public static string GetCurrencySymbol(string code)
{
System.Globalization.RegionInfo regionInfo = (from culture in System.Globalization.CultureInfo.GetCultures(System.Globalization.CultureTypes.InstalledWin32Cultures)
where culture.Name.Length > 0 && !culture.IsNeutralCulture
let region = new System.Globalization.RegionInfo(culture.LCID)
where String.Equals(region.ISOCurrencySymbol, code, StringComparison.InvariantCultureIgnoreCase)
select region).First();
return regionInfo.CurrencySymbol;
}
【讨论】：
这就是我得到的方式 声明 @CultureCode varchar(10) = 'en-us'
SELECT SUBSTRING(FORMAT(CONVERT(money,0), 'C', @CultureCode ),1,1) CurrencySymbol
【讨论】：