API for currency exchange rate

Question

Hi,
How about the way to directly retrieve currency exchange rate automatically?

Answer 1

Try the following

public class ExchangeOperations  
{  
    public static readonly Dictionary<string, decimal> ExchangeRateToEuro = new();  
    public static List<string> FromCurrency = new ();  
    public static List<string> ToCurrency = new ();  
  
    public static void LoadRates()  
    {  
  
        XmlDocument xmlDoc = new XmlDocument();  
        xmlDoc.Load("http://www.ecb.int/stats/eurofxref/eurofxref-daily.xml");  
          
        foreach (XmlNode node in xmlDoc.DocumentElement.ChildNodes[2].ChildNodes[0].ChildNodes)  
        {  
            ExchangeRateToEuro.Add(node.Attributes["currency"].Value, decimal.Parse(node.Attributes["rate"].Value));  
            FromCurrency.Add(node.Attributes["currency"].Value);  
            ToCurrency.Add(node.Attributes["currency"].Value);  
        }  
    }  
}  

Simple example

ExchangeOperations.LoadRates();  
  
decimal amount = 4;  
decimal conversionNum = (amount / ExchangeOperations.ExchangeRateToEuro["USD"]) *   
                        ExchangeOperations.ExchangeRateToEuro["GBP"];  
  
Debug.WriteLine(conversionNum.ToString("0.00"));  

This was originally done for VB.NET and converted to C#

Original code
https://learn.microsoft.com/en-us/answers/questions/451297/read-currency-rate-details-available-from-web.html