C# formatting currency given currency code (like USD / GBP / FRF)

I am integrating with a database which returns currencies (System.Decimal) and currency codes. The currency codes are strings like "USD", "GBP", and even "FRF".

Is there something built-in to mscorlib which can help me format these currencies? I first thought about setting up a mapping between database currency code and CultureInfo, but I don't know what to do about FRF because if I use "fr-FR", it would format as euros instead of francs.

The开发者_开发百科 full list of currency symbols we must support is:

FRF
CHF
NZD
IN2
SAR
SEK
EUR
MXP
DKK
GBP
AUD
IN1
AED
CAD
NOK
INR
USD
PLN

I first thought about setting up a mapping between database currency code and CultureInfo, but I don't know what to do about FRF because if I use "fr-FR", it would format as euros instead of francs.

I would take this approach, but make a custom IFormatProvider for FRF that does the formatting you choose. This is as easy as constructing a NumberFormatInfo properly.

You can replace the default currency and still make use of the framework...

using System;
using System.Globalization;
using System.Threading;
public class EuroLocalSample
{
   public static void Main()
   { 
     // Create a CultureInfo object for French in France.
     CultureInfo FrCulture = new CultureInfo("fr-FR");
     // Set the CurrentCulture to fr-FR.
     Thread.CurrentThread.CurrentCulture = FrCulture;
    // Clone the NumberFormatInfo object and create
    // a new object for the local currency of France.
    NumberFormatInfo LocalFormat =
    (NumberFormatInfo)NumberFormatInfo.CurrentInfo.Clone();
    // Replace the default currency symbol with the local
    // currency symbol.
    LocalFormat.CurrencySymbol = "F";

    int i = 100;

    // Display i formatted as the local currency.
    Console.WriteLine(i.ToString("c", LocalFormat));
    // Display i formatted as the default currency.
    Console.WriteLine(i.ToString("c", NumberFormatInfo.CurrentInfo));
   }
}

That's a pretty small list. I'd just setup the mappings manually.