public async Task <FxRateDetails> Parse(string fromCurrency, string toCurrency, string url)
{
try
{
WebClient web = new WebClient();
string response = await web.DownloadStringTaskAsync(url);
//string[] values = Regex.Split(response,",");
//double rate = System.Convert.ToDouble(values[1]);
var matches = Regex.Matches(response, "<span class=\"?bld\"?>([^<]+)</span>");
if (matches.Count > 0)
{
var matches2 = Regex.Split(matches[0].Groups[1].Value, @"[^0-9\.]+");
if (matches2 != null && matches2.Length > 1)
{
var rate = Convert.ToDouble(matches2[0]);
var fxRateDetails = new FxRateDetails();
fxRateDetails.FromCurrency = fromCurrency;
fxRateDetails.ToCurrency = toCurrency;
fxRateDetails.Rate = rate;
return(fxRateDetails);
}
}
}
catch (Exception)
{
// ignored, if exception
}
return(null);
}
private void RatesService_FxRateUpdate(FXRateService.FxRateDetails rate)
{
lock (locker)
{
RateViewModel exisistingRate;
if (rateDictionary.TryGetValue(rate.FromCurrency + rate.ToCurrency, out exisistingRate))
{
exisistingRate.UpdateCount += 1;
if (exisistingRate.UpdateCount == 1)
{
exisistingRate.Rate = rate.Rate;
exisistingRate.UpdateTime = rate.UpdateTime;
return;
}
else if (exisistingRate.Rate == rate.Rate && exisistingRate.UpdateCount % 3 == 0)
{
exisistingRate.Rate = rate.Rate + 0.01;
exisistingRate.UpdateTime = rate.UpdateTime;
}
else
{
exisistingRate.Rate = rate.Rate;
exisistingRate.UpdateTime = rate.UpdateTime;
}
//Apply calculation to change currency rates for all other currencies conversion using ToCurrency
//Update all currencies in row
var dependentCurrenciesInRow = rateDictionary.Values.Where(v => v.FromCurrency == rate.ToCurrency).ToList();
if (dependentCurrenciesInRow != null && dependentCurrenciesInRow.Count > 0)
{
foreach (var cur in dependentCurrenciesInRow)
{
RateViewModel exisistingRate2;
if (rateDictionary.TryGetValue("USD" + cur.ToCurrency, out exisistingRate2))
{
try
{
cur.Rate = exisistingRate2.Rate / exisistingRate.Rate;
cur.UpdateTime = exisistingRate.UpdateTime;
}
catch (DivideByZeroException)
{
}
}
}
}
//update all currencies in columns
var dependentCurrenciesInColumn = rateDictionary.Values.Where(v => v.ToCurrency == rate.ToCurrency && v.ToCurrency != "USD").ToList();
if (dependentCurrenciesInColumn != null && dependentCurrenciesInColumn.Count > 0)
{
foreach (var cur in dependentCurrenciesInColumn)
{
RateViewModel exisistingRate2;
if (rateDictionary.TryGetValue("USD" + cur.FromCurrency, out exisistingRate2))
{
try
{
cur.Rate = exisistingRate.Rate / exisistingRate2.Rate;
cur.UpdateTime = exisistingRate.UpdateTime;
}
catch (DivideByZeroException)
{
}
}
}
}
}
}
}