Asp.net web api 从web.DownloadString（uri）返回的json结果中获取值；

我有转换货币的api

WebClient web = new WebClient();
                Uri uri = new Uri(string.Format("https://www.alphavantage.co/query?function=CURRENCY_EXCHANGE_RATE&from_currency={0}&to_currency={1}&apikey=demo", currFrom, currTo));
                string response = web.DownloadString(uri);

响应字符串包含

{
    "Realtime Currency Exchange Rate": {
        "1. From_Currency Code": "USD",
        "2. From_Currency Name": "United States Dollar",
        "3. To_Currency Code": "INR",
        "4. To_Currency Name": "Indian Rupee",
        "5. Exchange Rate": "71.44300000",
        "6. Last Refreshed": "2019-02-19 10:01:45",
        "7. Time Zone": "UTC"
    }
}

我将如何从中获得汇率

---

请帮助我

对于特定的响应，您可以使用以下内容：

    string response = "{\"Realtime Currency Exchange Rate\": {\"1. From_Currency Code\": \"USD\",\"2. From_Currency Name\": \"United States Dollar\",\"3. To_Currency Code\": \"INR\",\"4. To_Currency Name\": \"Indian Rupee\",\"5. Exchange Rate\": \"71.44300000\",\"6. Last Refreshed\": \"2019-02-19 10:01:45\",\"7. Time Zone\": \"UTC\"}}";

var parsedObject = Newtonsoft.Json.JsonConvert.DeserializeObject<JObject>(response);

var actualContent = parsedObject["Realtime Currency Exchange Rate"];
var currencyCode = actualContent.ElementAt(0);
var currencyName = actualContent.ElementAt(1);
.........
var exchangeRate = actualContent.ElementAt(4);

string response=“{\”实时货币汇率“：{\”1.来自货币代码“：”美元“，”2.来自货币名称“：”美元“，”3.至货币代码“：”印度卢比“，”4.至货币名称“：”印度卢比“，”5.汇率“：”71.44300000“，”6.上次刷新“：”2019-02-19 10:01:45“，”7.时区“：”UTC“，”；
var parsedObject=Newtonsoft.Json.JsonConvert.DeserializeObject（响应）；
var actualContent=parsedObject[“实时货币汇率”]；
var currencyCode=实际内容元素（0）；
var currencyName=实际内容元素（1）；
.........
var汇率=实际内容元素（4）；

您所需要的只是对Newtonsoft.Json的引用