C# 中 YahooFinanceAPI NuGet 包的问题

Question

我在使用 YahooFinanceAPI NuGet 包时遇到问题。我正在尝试使用此包获取历史数据，目前我有一个 window 用户可以在其中放置一些信息，并且在单击按钮后我想在列表视图中显示历史价格。点击按钮的过程是：

private async void BtnGetData_Click(object sender, RoutedEventArgs e)
        {
            DataTable Histo = new DataTable();
            foreach (string s in ListCol)
            {
                DataColumn x = new DataColumn();
                x.ColumnName = s;
                x.DataType = System.Type.GetType("System.String");
                Histo.Columns.Add(x);
            }
            Symbol = "^FCHI";// Ticker.Text;
            StartDate = "21/02/2021";// DD.Text;
            EndDate = "21/02/2022"; //DF.Text;
            //Histo = DataFromYahoo.GetData(Symbol, StartDate, EndDate);
            var awaiter = DataFromYahoo.ReceiveData(Symbol, StartDate, EndDate, Histo);
            if (awaiter.Result == 1)
            {
                foreach (DataRow row in Histo.Rows)
                {
                    foreach (DataColumn col in Histo.Columns)
                    {
                        YahooData.Items.Add(row[col].ToString());
                    }
                }
            }
        }

这部分：

var awaiter = DataFromYahoo.ReceiveData(Symbol, StartDate, EndDate, Histo);

来自我创建的 DLL :

public async Task<int> ReceiveData (string Symbol, string DD, string DF, DataTable Result)
        {
            DateTime StartDate;
            DateTime EndDate;
            StartDate = ConvertDate(DD);
            EndDate = ConvertDate(DF);
            var histo = await Yahoo.GetHistoricalAsync(Symbol, StartDate, EndDate,Period.Daily);
            DataRow row;
            foreach (var candle in histo)
            {
                row = Result.NewRow();
                row["Date"] = candle.DateTime.Date.ToString();
                row["Open"] = candle.Open.ToString();
                row["High"] = candle.High.ToString();
                row["Low"] = candle.Low.ToString();
                row["Close"] = candle.Close.ToString();
                row["AdjClos"] = candle.AdjustedClose.ToString();
                row["Volume"] = candle.Volume.ToString();
                Result.Rows.Add(row);

            }
            return 1;
        }

但是当代码到达部分时:

var histo = await Yahoo.GetHistoricalAsync(Symbol, StartDate, EndDate,Period.Daily);

它停止了，没有任何异常或错误消息。

我从 here

得到这部分

而且我不太确定我做错了什么。我也是 C# 的新手，我并不真正了解异步方法的工作原理，所以如果有人对我有一些答案，我会很高兴。谢谢！

编辑：ConvertDate() 函数也只是将日期从字符串格式转换为 DateTime 格式，因为它在 link.

中使用

Answer 1

您应该等待您的异步方法：

private async void BtnGetData_Click(object sender, RoutedEventArgs e)
{
    DataTable Histo = new DataTable();
    foreach (string s in ListCol)
    {
        DataColumn x = new DataColumn();
        x.ColumnName = s;
        x.DataType = System.Type.GetType("System.String");
        Histo.Columns.Add(x);
    }
    Symbol = "^FCHI";// Ticker.Text;
    StartDate = "21/02/2021";// DD.Text;
    EndDate = "21/02/2022"; //DF.Text;
                            //Histo = DataFromYahoo.GetData(Symbol, StartDate, EndDate);
    var awaiter = await DataFromYahoo.ReceiveData(Symbol, StartDate, EndDate, Histo);
    if (awaiter == 1)
    {
        foreach (DataRow row in Histo.Rows)
        {
            foreach (DataColumn col in Histo.Columns)
            {
                YahooData.Items.Add(row[col].ToString());
            }
        }
    }
}

“滥用”异步代码，例如访问阻塞 .Result 属性可能会出现死锁，这可能就是您在这里遇到的情况。

Answer 2

为什么不直接用yahooapi（他们还是支持调用的）。我用这个。请参阅下面的示例函数以获取历史数据

public StringBuilder FetchStockDataOnline(string scriptname, string range, string interval, string indicators = "quote", bool includeTimestamps = true)
        {
            StringBuilder returnData = null;
            string webservice_url = "";
            WebResponse wr;
            Stream receiveStream = null;
            StreamReader reader = null;
            try
            {
                //https://query1.finance.yahoo.com/v7/finance/chart/HDFC.BO?range=2yr&interval=1d&indicators=quote&includeTimestamps=true
                webservice_url = string.Format(StockManager.urlGetStockData, scriptname, range, interval, indicators, includeTimestamps);

                Uri url = new Uri(webservice_url);
                var webRequest = WebRequest.Create(url);
                webRequest.Method = "GET";
                webRequest.ContentType = "application/json";
                wr = webRequest.GetResponseAsync().Result;
                receiveStream = wr.GetResponseStream();
                reader = new StreamReader(receiveStream);
                returnData = new StringBuilder(reader.ReadToEnd());
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            return returnData;
        }

C# 中 YahooFinanceAPI NuGet 包的问题

Trouble with YahooFinanceAPI NuGet Package in C#

c#

wpf

yahoo-finance