c# - 从 C# 中的货币转换器 API 获取汇率

Question

这是我的 api 调用:

https://free.currencyconverterapi.com/api/v6/convert?q=EUR_USD&compact=y

我写了一个方法来接受汇率的进/出参数，我成功地取回了结果。我的问题是解析该结果以获得值(value)。这是我到目前为止所拥有的:

public async Task<string> GetExchangeRate(string from, string to)
{
    //Examples:
    //from = "EUR"
    //to = "USD"
    using (var client = new HttpClient())
    {
        try
        {
            client.BaseAddress = new Uri("https://free.currencyconverterapi.com");
            var response = await client.GetAsync($"/api/v6/convert?q={from}_{to}&compact=y");
            var stringResult = await response.Content.ReadAsStringAsync();
            dynamic data = JObject.Parse(stringResult);
            //data = {"EUR_USD":{"val":1.140661}}
            //I want to return 1.140661
            //EUR_USD is dynamic depending on what from/to is
            return data.?????.val;
        }
        catch (HttpRequestException httpRequestException)
        {
            Console.WriteLine(httpRequestException.StackTrace);
            return "Error calling API. Please do manual lookup.";
        }
    }
}

如果我的数据变量 = {"EUR_USD":{"val":1.140661}} 其中 "EUR_USD" 是动态的(它的变化取决于去往/来自什么是) 那么我如何返回 1.140661？

我使用的答案这是我根据@maccettura 评论使用的代码:

var stringResult = await response.Content.ReadAsStringAsync();
var dictResult = JsonConvert.DeserializeObject<Dictionary<string, Dictionary<string, string>>>(stringResult);
return dictResult[$"{from}_{to}"]["val"];

Answer 1

谢谢@maccettura。

var stringResult = await response.Content.ReadAsStringAsync();
var dictResult = JsonConvert.DeserializeObject<Dictionary<string, Dictionary<string, string>>>(stringResult);
return dictResult[$"{from}_{to}"]["val"];