C#中使用DevExpress中的ChartControl實現極座標圖的案例詳解

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using DevExpress.XtraCharts;

namespace WinTest
{
    public partial class Form1 : Form
    {
        private Stopwatch sw = new Stopwatch();
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            sw.Restart();

            int fontSize = 9;                   //字號
            int count = 1;                      //曲線數量
            int points = 8;                     //每條曲線的點數
            int angleMaxValue = 24;             //角度最大值
            int maxShowPints = 30;              //最大顯示的點數

            for (int i = 0; i < this.Controls.Count; i++)
            {
                if (this.Controls[i] is ChartControl)
                {
                    this.Controls.RemoveAt(i);
                    break;
                }
            }
            // Create a new chart.
            ChartControl RadarLineChart = new ChartControl();

            // Add a radar series to it.
            Series[] seriesArr = new Series[count];
            List<SeriesPoint>[] pintValuesList = new List<SeriesPoint>[count];
            for (int i = 0; i < seriesArr.Length; i++)
            {
                pintValuesList[i] = new List<SeriesPoint>();
                seriesArr[i] = new Series("Series " + i, ViewType.RadarLine);      //使用雷達折線圖範例化Series

                RadarLineSeriesView radLineSeriesView = (seriesArr[i].View as RadarLineSeriesView);
                radLineSeriesView.MarkerVisibility = DevExpress.Utils.DefaultBoolean.False;  //去掉線條中的圓點
                radLineSeriesView.Closed = false;           //線條不形成閉環
                
                RadarLineChart.Series.Add(seriesArr[i]);
            }

            // Flip the diagram (if necessary).
            RadarDiagram radarDiagram = RadarLineChart.Diagram as RadarDiagram;
            radarDiagram.StartAngleInDegrees = 0; //開始的角度
            radarDiagram.AxisX.WholeRange.MinValue = 0;         //設定角度範圍最小值
            radarDiagram.AxisX.WholeRange.MaxValue = 23;        //設定角度範圍最大值
            radarDiagram.RotationDirection = RadarDiagramRotationDirection.Clockwise; //資料是順時針還是逆時針
            

            // Add a title to the chart and hide the legend.
            ChartTitle chartTitle1 = new ChartTitle();
            chartTitle1.Text = "Radar Line Chart";
            RadarLineChart.Titles.Add(chartTitle1);
            RadarLineChart.Legend.Visibility = DevExpress.Utils.DefaultBoolean.False;       //隱藏圖例

            // Add the chart to the form.
            RadarLineChart.Dock = DockStyle.Fill;
            this.Controls.Add(RadarLineChart);

            // Populate the series with points.
            Random r = new Random((int)DateTime.Now.Ticks);
            r.NextDouble();
            for (int i = 0; i < seriesArr.Length; i++)
            {
                for (int k = 0; k < points; k++)
                {
                    double yValue = 100 * r.NextDouble();
                    pintValuesList[i].Add(new SeriesPoint(k * 24.0 / points, yValue));
                }
                seriesArr[i].Points.AddRange(pintValuesList[i].ToArray());
                seriesArr[i].LabelsVisibility = DevExpress.Utils.DefaultBoolean.False;      //隱藏資料點的標籤顯示
            }
        }
    }
}