public static decimal ConvertTo(decimal fromAmount, CurrencyType fromCurrencyType, CurrencyType toCurrencyType, Currency[] currencies)
{
if (fromCurrencyType == toCurrencyType)
return fromAmount;
if ((fromCurrencyType != CurrencyType.CZK && currencies.All(c => c.CurrencyType != fromCurrencyType)) ||
toCurrencyType != CurrencyType.CZK && currencies.All(c => c.CurrencyType != toCurrencyType))
{
throw new Exception(String.Format(ValidationResource.Currency_CannotProccessCurrencyChange_ErrorMessage, fromCurrencyType, toCurrencyType));
}
decimal amountTo = fromAmount;
Currency currency;
// Převod konta na CZK
if (fromCurrencyType != CurrencyType.CZK)
{
currency = currencies.Single(c => c.CurrencyType == fromCurrencyType);
amountTo = amountTo * currency.ExchangeRateToCZK;
}
// Převod konta na aktuální měnu
if (toCurrencyType != CurrencyType.CZK)
{
currency = currencies.Single(c => c.CurrencyType == toCurrencyType);
amountTo = amountTo / currency.ExchangeRateToCZK;
}
return amountTo;
}