使用FSHARP.DATA的JSONPROVIDER进行Binance-Requeast

Question

我正在尝试使用 binance-connector for .net。在f＃-Examples中，我们有以下内容：

let f = 
    let loggerFactory = LoggerFactory.Create(fun (builder:ILoggingBuilder) -> 
        builder.AddConsole() |> ignore
    )
    let logger = loggerFactory.CreateLogger()

    let loggingHandler = new BinanceLoggingHandler(logger)
    let httpClient = new HttpClient(loggingHandler)
    
    let market = new Market(httpClient)
    
    let result = market.TwentyFourHrTickerPriceChangeStatistics() |> Async.AwaitTask |> Async.RunSynchronously

    0

结果是一个字符串，看起来像这样：

{"symbol":"ETHBTC","priceChange":"0.00013400","priceChangePercent":"0.179","weightedAvgPrice":"0.07444089","prevClosePrice":"0.07467300","lastPrice":"0.07480700","lastQty":"0.04640000","bidPrice":"0.07480600","bidQty":"6.01380000","askPrice":"0.07480700","askQty":"48.54320000","openPrice":"0.07467300","highPrice":"0.07531600","lowPrice":"0.07357000","volume":"80296.33090000","quoteVolume":"5977.33041290","openTime":1650281947747,"closeTime":1650368347747,"firstId":335177449,"lastId":335313233,"count":135785}

这是按预期工作的，但是我当然想处理结果。 因此，我试图与JSONPROVIDER进行应对：

   type Simple = JsonProvider<result>

这是由于某种原因行不通的。该错误存在，并说未定义构造函数或值（FS0039） JSONPROVIDER的文档中的一个示例如下：

type Simple = JsonProvider<""" { "name":"John", "age":94 } """>
let simple = Simple.Parse(""" { "name":"Tomas", "age":4 } """)
simple.Age
simple.Name

如何正确地将JSON施加到一种类型中？

此致

Answer 1

jsonprovider＆lt; ...＆gt;采用静态字符串参数，该参数是示例字符串或示例文件（本地或在线访问），以便提供者从中推断出类型。

因此，在您的情况下，这将是：

let [<Literal>] BinanceSample = """ [{"symbol":"ETHBTC","priceChange":"-0.00163000"}] """

type Binance = JsonProvider<BinanceSample>

然后，您应该能够使用：

let parsed = Binance.Parse(result)

PS：尝试提供尽可能完整的JSON样本。