Visual Studio中如何将读取的股票文件数据显示到图表中？

我正在开发一个基于Visual Studio .NET Framework的WinForms项目，功能是从本地文件读取股票K线数据，点击加载按钮后将数据展示在图表中。目前已完成数据读取和DataGridView展示部分，但对C#不熟悉，不知道主窗体类的connectChart方法里需要写什么代码来实现K线图表展示。

相关代码如下：

主窗体类代码 #

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Stock_Project_Loader_Final
{
    public partial class StockLoader : Form
    {
        aCandlestickReader candlestickReader = null;
        List<aCandlestick> listOfCandlesticks = null;
        public StockLoader()
        {
            InitializeComponent();
            candlestickReader = new aCandlestickReader();
            dataGridView1.DataSource = listOfCandlesticks = new List<aCandlestick>(512);
        }

        private void buttonLoad_Click(object sender, EventArgs e)
        {
            String Period = String.Empty;
            if (radioButtonDaily.Checked ) { Period = "Day"; }
            else if (radioButtonWeekly.Checked) { Period = "Week"; }
            else { MessageBox.Show("Please select a period"); }
            listOfCandlesticks = candlestickReader.readStock(textBoxTicker.Text, Period, dateTimePickerStart.Value, dateTimePickerEnd.Value);
            dataGridView1.DataSource = listOfCandlesticks;

            connectChart();
        }

        public void connectChart()
        {
            //WHAT GOES IN HERE??????????????????????????????????????
        }
    }
}

K线数据读取类代码 #

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Remoting.Messaging;
using System.Text;
using System.Threading.Tasks;

namespace Stock_Project_Loader_Final
{
    public class aCandlestickReader
    {
        const string dataFolder = "Stock Data";
        public List<aCandlestick> listOfCandlesticks = null;
        
        public aCandlestickReader()
        {
            listOfCandlesticks = new List<aCandlestick>(256);
        }

        public List<aCandlestick> readlistOfCandlesticks(string csvFilename, DateTime startDate, DateTime endDate)
        {
            char[] separators = new char[] { '-', ',', '"' };
            //Get all the lines as a String array by reading all the lines
            String[] lines = System.IO.File.ReadAllLines(csvFilename);

            //Skip the header
            String header = lines[0];
            //use first line to make sure the file is a proper candlestick file
            if (header == "\"Date\",\"Open\",\"High\",\"Low\",\"Close\",\"Volume\"")
            {
                //Create list of candlesticks with enough capacity for number of candlesticks read
                listOfCandlesticks = new List<aCandlestick>(lines.Length - 1);

                for (int l = 1; l < lines.Length; ++l)
                {
                    //Get the lth line
                    String line = lines[l].Trim();

                    //Split it base on ,-"
                    string[] subStrings = line.Split(separators, StringSplitOptions.RemoveEmptyEntries);

                    //Parse the date info
                    int year = int.Parse(subStrings[0]);
                    int month = int.Parse(subStrings[1]);
                    int day = int.Parse(subStrings[2]);
                    //Build a date object from the first 3 substrings
                    DateTime date = new DateTime(year, month, day);

                    //Compare the date of this line with our range of desired dates
                    if (date.CompareTo(startDate) >= 0 && date.CompareTo(endDate) <= 0)
                    {
                        //Now get the other parts of the line: Open, High, Low, Close, and Volume
                        Decimal open = Decimal.Parse(subStrings[3]);
                        Decimal high = Decimal.Parse(subStrings[4]);
                        Decimal low = Decimal.Parse(subStrings[5]);
                        Decimal close = Decimal.Parse(subStrings[6]);
                        long volume = long.Parse(subStrings[7]);

                        open = Math.Round(open, 2);
                        high = Math.Round(high, 2);
                        low = Math.Round(low, 2);
                        close = Math.Round(close, 2);

                        //Create new candlestick with proper parameters
                        aCandlestick candleStick = new aCandlestick(date, open, high, low, close, volume);
                        //Add newly created candlestick to the list of listOfCandlesticks
                        listOfCandlesticks.Add(candleStick);
                    }
                }
            }

            return listOfCandlesticks;
        }

        public List<aCandlestick> readStock(String ticker, String period, DateTime startDate, DateTime endDate)
        {
            //Create filename for the ticker by concatenating the dataFolder name, ticker name, period and extension
            String csvFilename = dataFolder + @"\\" + ticker + "-" + period + ".csv";

            //Read the candlesticks and return them as the listOfCandlestick member
            listOfCandlesticks = readlistOfCandlesticks(csvFilename, startDate, endDate);

            return listOfCandlesticks;
        }
        
    }
}

K线实体类代码 #

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Stock_Project_Loader_Final
{
    public class aCandlestick
    {
        public DateTime date { get; set; }
        public Decimal open { get; set; }
        public Decimal high { get; set; }
        public Decimal low { get; set; }
        public Decimal close { get; set; }
        public long volume { get; set; }

        public aCandlestick()
        {
            date = DateTime.Now;
            open = 0;
            high = 0;
            low = 0;
            close = 0;
            volume = 0;

        }
        public aCandlestick(DateTime date, Decimal open, Decimal high, Decimal low, Decimal close, long volume)
        {
            this.date = date;
            this.open = open;
            this.high = high;
            this.low = low;
            this.close = close;
            this.volume = volume;
        }
    }
}

首先确保你的WinForms窗体上已经拖拽添加了Chart控件（命名为chartStock，可自行修改），并给项目添加System.Windows.Forms.DataVisualization引用（右键项目→添加→引用→勾选该程序集）。之后在connectChart方法中编写以下代码：

using System.Windows.Forms.DataVisualization.Charting;

public void connectChart()
{
    // 清空图表现有数据
    chartStock.Series.Clear();
    
    // 无数据时直接返回
    if (listOfCandlesticks == null || listOfCandlesticks.Count == 0)
    {
        MessageBox.Show("No data to display");
        return;
    }

    // 创建K线系列并设置类型
    Series candleSeries = new Series("Candlesticks");
    candleSeries.ChartType = SeriesChartType.Candlestick;
    
    // 配置数据映射：X轴为日期，Y轴对应开盘/最高/最低/收盘
    candleSeries.XValueType = ChartValueType.DateTime;
    candleSeries.YValuesPerPoint = 4;

    // 遍历K线数据，添加到图表系列
    foreach (var candle in listOfCandlesticks)
    {
        double open = Convert.ToDouble(candle.open);
        double high = Convert.ToDouble(candle.high);
        double low = Convert.ToDouble(candle.low);
        double close = Convert.ToDouble(candle.close);
        
        candleSeries.Points.AddXY(candle.date, open, high, low, close);
    }

    // 设置K线颜色：上涨绿，下跌红
    candleSeries["PriceUpColor"] = "Green";
    candleSeries["PriceDownColor"] = "Red";

    // 将系列添加到图表
    chartStock.Series.Add(candleSeries);

    // 配置图表区域样式
    ChartArea chartArea = chartStock.ChartAreas[0];
    chartArea.AxisX.LabelStyle.Format = "yyyy-MM-dd";
    chartArea.AxisX.MajorGrid.Enabled = false;
    chartArea.AxisY.Title = "Price";
    chartArea.AxisY.MajorGrid.LineColor = Color.LightGray;

    // 设置图表标题
    chartStock.Titles.Clear();
    chartStock.Titles.Add($"Stock: {textBoxTicker.Text}");
}

关键说明 #

• 代码中使用WinForms自带的Chart控件实现K线图，无需额外第三方库
• 将Decimal类型转换为double是因为Chart控件仅支持数值类型为double
• 配置了基础的K线样式和图表布局，可根据需求调整颜色、网格线、标签格式等

内容的提问来源于stack exchange，提问作者Verminator25