/// <summary>Converts the string to a currency.
/// A return value indicates whether the conversion succeeded.
/// </summary>
/// <param name="s">
/// A string containing a currency to convert.
/// </param>
/// <param name="formatProvider">
/// The specified format provider.
/// </param>
/// <param name="result">
/// The result of the parsing.
/// </param>
/// <returns>
/// True if the string was converted successfully, otherwise false.
/// </returns>
public static bool TryParse(string s, IFormatProvider formatProvider, out Currency result)
{
result = Empty;
if (string.IsNullOrEmpty(s))
{
return(true);
}
var culture = formatProvider as CultureInfo ?? CultureInfo.InvariantCulture;
if (Qowaiv.Unknown.IsUnknown(s, culture) || s == Unknown.Symbol)
{
result = Unknown;
return(true);
}
AddCulture(culture);
var str = Parsing.ToUnified(s);
if (Parsings[culture].TryGetValue(str, out string val) || Parsings[CultureInfo.InvariantCulture].TryGetValue(str, out val))
{
result = new Currency(val);
return(true);
}
foreach (var currency in AllCurrencies.Where(c => !string.IsNullOrEmpty(c.Symbol)))
{
if (currency.Symbol == str)
{
result = currency;
return(true);
}
}
return(false);
}
private double CalculateConversion()
{
string CurrencyIn = this.SelectorFrom.CurrencySelected?.Currency;
string CurrencyOut = this.SelectorTo.CurrencySelected?.Currency;
var inputCurrency = AllCurrencies.SingleOrDefault(x => x.ISOCode == CurrencyIn);
var outputCurrency = AllCurrencies.SingleOrDefault(x => x.ISOCode == CurrencyOut);
double currencyRate = CurrencyHelper.GetCurrencyRate(inputCurrency, outputCurrency);
double InputValue = this.EnteredValue;
return(Math.Round(InputValue * currencyRate, 2));
}
private void InitializeCurrencyLists()
{
var currencySelectionGrouping = AllCurrencies.GroupBy(c => _selectedCurrencyTypes.Contains(c.Id)).ToList();
_selectedCurrenciesDataSource = new BindingList <Currency>(currencySelectionGrouping.Where(g => g.Key).SelectMany(c => c).ToList());
_unselectedCurrenciesDataSource = new BindingList <Currency>(currencySelectionGrouping.Where(g => !g.Key).SelectMany(c => c).ToList());
_lstSelectedCurrencies.DisplayMember = "NameAndSymbol";
_lstSelectedCurrencies.ValueMember = "Id";
_lstSelectedCurrencies.DataSource = _selectedCurrenciesDataSource;
_lstUnselectedCurrencies.DisplayMember = "NameAndSymbol";
_lstUnselectedCurrencies.ValueMember = "Id";
_lstUnselectedCurrencies.DataSource = _unselectedCurrenciesDataSource;
}
public CurrencyConversionViewModel()
{
this.AllCurrencies = IsoCurrencyCodes.AllCurrencies().ToList();
this.InUseCurrencies = AllCurrencies.Where(x => x.InUse == true).ToList();
ResetDefaults();
this.CurrencyInput.ValueChanged += InputCurrency;
this.CurrencyInput.InputValue = 1.00;
this.CurrencyOutput.IsReadOnly = true;
this.SelectorFrom.Id = FromSelector;
this.SelectorFrom.SelectionChanged += SelectionChanged;
this.SelectorTo.Id = ToSelector;
this.SelectorTo.SelectionChanged += SelectionChanged;
RevertCommand = new RelayCommand(this.Revert);
Mediator.Instance.Register(this);
}
/// <summary>Gets a currency by its ISO numeric code</summary>
/// <param name="numericCode">The ISO numeric code of the desired currency</param>
/// <exception cref="ArgumentException">
/// Thrown when no currency is found with the specified ISO numeric code
/// </exception>
/// <returns>A <see cref="Currency"/> instance</returns>
public static Currency ByNumericCode(string numericCode)
{
var filteredCurrencies = AllCurrencies.Where(
currency => currency.NumericCode == numericCode
);
if (filteredCurrencies.Count() > 0)
{
var currency = filteredCurrencies.First();
return(new Currency(
currency.AlphabeticCode,
currency.NumericCode,
currency.MinorUnits,
currency.Sign,
currency.Name
));
}
throw new ArgumentException(
$"There is no registered currency with the numeric code {numericCode}"
);
}
private IsoCurrencyModel CurrencyInfo(string currency)
{
var currencyInfo = AllCurrencies.SingleOrDefault(x => x.ISOCode == currency);
return(currencyInfo);
}
/// <summary>Gets all countries existing on the specified measurement date.</summary>
/// <param name="measurement">
/// The measurement date.
/// </param>
/// <returns>
/// A list of existing countries.
/// </returns>
public static IEnumerable <Currency> GetExisting(Date measurement)
{
return(AllCurrencies.Where(currency => currency.ExistsOnDate(measurement)));
}
