How do I get currency exchange rates via an API such as Google Finance? [closed]

Answer 1

For all newbie guys searching for some hint about currency conversion, take a look at this link. Datavoila

It helped med a lot regarding my own project in C#. Just in case the site disappears, I'll add the code below. Just add the below steps to your own project. Sorry about the formatting.

const string fromCurrency = "USD";
const string toCurrency = "EUR";
const double amount = 49.95;
// For other currency symbols see http://finance.yahoo.com/currency-converter/
// Clear the output editor //optional use, AFAIK
Output.Clear();

// Construct URL to query the Yahoo! Finance API
const string urlPattern = "http://finance.yahoo.com/d/quotes.csv?s={0}{1}=X&f=l1";
string url = String.Format(urlPattern, fromCurrency, toCurrency);

// Get response as string
string response = new WebClient().DownloadString(url);

// Convert string to number
double exchangeRate =
    double.Parse(response, System.Globalization.CultureInfo.InvariantCulture);

// Output the result
Output.Text = String.Format("{0} {1} = {2} {3}",
                            amount, fromCurrency,
                            amount * exchangeRate, toCurrency);