public double GetExchangeRate(string fromCurrency, string toCurrency)
{
if (fromCurrency == null || toCurrency == null)
{
throw new ArgumentException(Resources.InvalidArgument);
}
string currency1 = fromCurrency.ToUpper(); //here case is handeled by converting string to upper case, as currencies are stored in uppercase in dictonary.
string currency2 = toCurrency.ToUpper();
ParseJSON parser = null;
try
{
parser = new ParseJSON();
}
catch (Exception e)
{
throw e;
}
string webData = "";
Dictionary <string, double> conversionRates = null;
try
{
WebClient client = new WebClient();
string url = ConfigurationManager.AppSettings["CurrencyURL"];
//webData will consist of the fetched data from webpage.
webData = client.DownloadString(url);
//conversionRates is a dictonary object which contains currency as key and conversion rates as value.
conversionRates = parser.ParseFile(webData);
}
catch (Exception e)
{
throw e;
}
if (currency1.ToUpper().Equals(parser.Source) == false)
{
throw new Exception(Resources.InvalidCurrency);
}
double conversionRate = 0.0;
if (conversionRates.TryGetValue(currency2, out conversionRate) == false)
{
throw new Exception(Resources.InvalidCurrency);
}
return(conversionRate);
}
public double GetExchangeRate(string fromCurrency, string toCurrency)
{
if (fromCurrency == null || toCurrency == null)
{
throw new ArgumentException(Resources.InvalidArgument);
}
string currency1 = fromCurrency.ToUpper(); //here case is handeled by converting string to upper case, as currencies are stored in uppercase in dictonary.
string currency2 = toCurrency.ToUpper();
ParseJSON parser = null;
try
{
parser = new ParseJSON();
}
catch (Exception e)
{
throw e;
}
string webData = "";
Dictionary<string, double> conversionRates = null;
try
{
WebClient client = new WebClient();
string url = ConfigurationManager.AppSettings["CurrencyURL"];
//webData will consist of the fetched data from webpage.
webData = client.DownloadString(url);
//conversionRates is a dictonary object which contains currency as key and conversion rates as value.
conversionRates = parser.ParseFile(webData);
}
catch (Exception e)
{
throw e;
}
if (currency1.ToUpper().Equals(parser.Source) == false)
throw new Exception(Resources.InvalidCurrency);
double conversionRate = 0.0;
if (conversionRates.TryGetValue(currency2, out conversionRate) == false)
{
throw new Exception(Resources.InvalidCurrency);
}
return conversionRate;
}