public void fillDropDowns()
{
int i = 0;
List <currency> currencyList = KP.getCurrencyList();
currency C = null;
String option = "";
//no currencies - quit early
if (currencyList.Count == 0)
{
return;
}
for (i = 0; i < currencyList.Count; i++)
{
C = currencyList[i];
option = C.getISO() + " - " + C.getName();
LeftDropdown.Items.Add(option);
RightDropdown.Items.Add(option);
}
//attempt to set default to USD - United States Dollar
try
{
LeftDropdown.SelectedIndex = 17;
RightDropdown.SelectedIndex = 17;
}
catch (Exception E) { }
return;
}
public void insertAlphabetical(currency C)
{
int i = 0;
int j = 0;
int length = currencyList.Count;
String insertName = C.getISO().ToUpper();
String compareName = "";
//empty list, insert at front
if (length == 0)
{
currencyList.Add(C);
return;
}
//iterate through every element of our list
for (i = 0; i < length; i++)
{
compareName = currencyList[i].getISO().ToUpper();
//ignore duplicates
if (insertName.Equals(compareName))
{
return;
}
//insert comes before compare alphabetically, insert here
if (insertName[0] < compareName[0])
{
currencyList.Insert(i, C);
return;
}
//each one begins with the same letter
else if (insertName[0] == compareName[0])
{
//compare each character in Insertname and Comparename until we find a mismatching character
for (j = 0; j < insertName.Length && j < compareName.Length; j++)
{
//insertName comes before compareName alphabetically at index j
if (insertName[j] < compareName[j])
{
currencyList.Insert(i, C);
return;
}
}
}
}
//exhausted list, insert at end
currencyList.Insert(i, C);
return;
}
public currency lookupISO(String ISO)
{
int i = 0;
currency C = new currency("not found", "not found", 1);
for (i = 0; i < currencyList.Count; i++)
{
if (currencyList[i].getISO().Equals(ISO))
{
return(currencyList[i]);
}
}
return(C);
}
public double convert(String from, String to, double amount)
{
//grab new exchange rates every minute
string currentTime = DateTime.Now.ToString("yyyy-MM-dd hh:mm tt");
//refresh rates if 60 seconds has passed
if (!timestamp.Equals(currentTime))
{
updateRates();
}
//begin conversion
currency fromCurrency = lookupISO(from);
currency toCurrency = lookupISO(to);
double result = 0;
result = amount / fromCurrency.getRate();
result = result * toCurrency.getRate();
return(result);
}
public void getCryptoExchangeRates()
{
currency C = null;
double exchangeRate = 0;
String ISO = "";
String fullName = "";
String rate = "";
String url = "https://min-api.cryptocompare.com/data/price?fsym=USD&tsyms=BTC,ETH,XRP,EOS,LTC,XLM,ADA,MIOTA,USDT,TRX,NEO";
//call CryptoCompare
WebClient wb = new WebClient();
var response = wb.DownloadString(url);
dynamic obj = JsonConvert.DeserializeObject(response);
//parse json
foreach (var temp in obj)
{
ISO = temp.Name;
rate = temp.Value;
//attempt to parse exchange rate
try
{
exchangeRate = double.Parse(rate);
}
catch (Exception e) { exchangeRate = 1; }
//check if the ISO is one that we care about
fullName = lookupName(ISO);
if (!fullName.Equals("ERROR"))
{
//add a new currency to currencyList
C = new currency(ISO, fullName, exchangeRate);
insertAlphabetical(C);
}
}
return;
}
public void getRealExchangeRates()
{
currency C = null;
double exchangeRate = 0;
String ISO = "";
String fullName = "";
String rate = "";
String url = "https://openexchangerates.org/api/latest.json?app_id=4d9a6a283a104a6fa454298522d751d7";
//call OpenExchange
WebClient wb = new WebClient();
var response = wb.DownloadString(url);
dynamic obj = JsonConvert.DeserializeObject(response);
foreach (var temp in obj.rates)
{
ISO = temp.Name;
rate = temp.Value;
//attempt to parse exchange rate
try
{
exchangeRate = double.Parse(rate);
}
catch (Exception e) { exchangeRate = 1; }
//check if the ISO is one that we care about
fullName = lookupName(ISO);
if (!fullName.Equals("ERROR"))
{
//add a new currency to currencyList
C = new currency(ISO, fullName, exchangeRate);
insertAlphabetical(C);
}
}
return;
}
