c#美元到欧元的转换总是返回0

Question

I am trying to make a dollar to euro converter. but strangely enough, it always returns 0. The intention is that the user, for example, 10 dollars to euro and then the result comes out how much 10 dollars than currently is in euros this is my code what I have at the moment.

This is my current code

            public void EUR_TO_usd(string clipboardText)
            {
                ActionResult actionResult = new ActionResult(clipboardText);
                if (clipboardText.EndsWith(" dollar to euro"))
                {
                    var parts = clipboardText.Split(' ');
                    if (parts.Length == 4)
                    {
                        if (double.TryParse(parts[0], out double amount))
                        {
                            if (parts[1] == "dollar" && parts[2] == "to" && parts[3] == "euro")
                            {
                                string url = "http://api.openrates.io/latest?base=USD";
                                string json = new WebClient().DownloadString(url);
                                var currency = JsonConvert.DeserializeObject<dynamic>(json);
                                double curAmount = amount * Convert.ToSingle(currency.rates.EUR);
                                actionResult.Title = clipboardText;
                                actionResult.Description = string.Format("{0:N2} {1} = {2:N2} {3}", amount, currency["base"], curAmount, "EUR");
                            }
                        }
                    }
                }

the only thing that worked was putting this in a switch and creating a variable amount with a value like this

                case "dollar to euro":
                    {
                        string url = "http://api.openrates.io/latest?base=USD";
                        string json = new WebClient().DownloadString(url);
                        var amount = 1;
                        var currency = JsonConvert.DeserializeObject<dynamic>(json);
                        double curAmount = amount * (double)currency.rates.EUR;
                        {
                            actionResult.Title = clipboardText;
                            actionResult.Description = $"{amount:N2} {currency.@base} = {curAmount:N2} EUR";
                        }
                    }
                    return actionResult;

but what I want is that the user can copy the number of euros as in my first example, but that always returns 0. How do I solve this?

Answer 1

I might be wrong but it doesn't seem like you are changing the actionResult, but only the title and description. And if you would want to just return a int i would use public int EUR_TO_usd() And i would look into the naming convention in C#, since a function name shoud not look like that imo.

And of course you need to call your function with that string.