C# 生成chart图表的三种方式

．net中，微软给我们提供了画图类（system.drawing.imaging），在该类中画图的基本功能都有。比如：直线、折线、矩形、多边形、椭圆形、扇形、曲线等等，因此一般的图形都可以直接通过代码画出来。接下来介绍一些画图函数：
Bitmap bmap=new Bitmap(500,500)　/定义图像大小；
bmap.Save(stream,imagecodecinfo) /将图像保存到指定的输出流；
Graphics gph /定义或创建gdi绘图对像；
PointF cpt　/定义二维平面中x,y坐标；
DrawString(string,font,brush,ponitf) /用指定的brush和font对像在指定的矩形或点绘制指定的字符串；
DrawLine(pen,ponit,ponit) /用指定的笔(pen)对像绘制指定两点之间直线；
DrawPolygon(pen,ponit[]) /用指定的笔(pen)对像绘制指定多边形，比如三角形，四边形等等；
FillPolygon(brush,ponit[]) /用指定的刷子(brush)对像填充指定的多边形；
DrawEllipse(pen,x,y,width,height) /用指定的笔绘制一个边框定义的椭圆；
FillEllipse(brush,x,y,width,height) /用指定的刷子填充一个边框定义的椭圆；
DrawRectangle(pen,x,y,width,height) /用指定的笔绘制一个指定坐标点、宽度、高度的矩形；
DrawPie(pen,x,y,width,height,startangle,sweepangle) /用指定的笔绘制一个指定坐标点、宽度、高度以及两条射线组成的扇形；

如果你在Form中绘图的话，不论是不是采用的双缓存，都会看到图片在更新的时候都会不断地闪烁，解决方法就是在这个窗体的构造函数中增加以下三行代码：

请在构造函数里面底下加上如下几行：

SetStyle(ControlStyles.UserPaint, true);

SetStyle(ControlStyles.AllPaintingInWmPaint, true);   //   禁止擦除背景.

SetStyle(ControlStyles.DoubleBuffer, true);   //   双缓冲

参数说明：

UserPaint

如果为true，控件将自行绘制，而不是通过操作系统来绘制。此样式仅适用于派生自   Control的类。

AllPaintingInWmPaint

如果为true，控件将忽略 WM_ERASEBKGND窗口消息以减少闪烁。仅当UserPaint   位设置为true时，才应当应用该样式。

DoubleBuffer

如果为true，则绘制在缓冲区中进行，完成后将结果输出到屏幕上。双重缓冲区可防止由控件重绘引起的闪烁。要完全启用双重缓冲，还必须将UserPaint和AllPaintingInWmPaint样式位设置为   true。

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Diagnostics;
  4 using System.Drawing;
  5 using System.Drawing.Drawing2D;
  6 using System.Windows.Forms;
  7 using System.Windows.Forms.DataVisualization.Charting;
  8
  9
 10 namespace WindowsFormsApp2
 11 {
 12     public partial class Form1 : Form
 13     {
 14         public Form1()
 15         {
 16             InitializeComponent();
 17         }
 18         private Queue<double> dataQueue = new Queue<double>();//把Queue<double>看成一个类型 int[] a=new int [8]
 19         List<int> lis = new List<int>();
 20         private void InitChart()
 21         {
 22             Chart[] ch = new Chart[1] { chart1 };
 23             for (int i = 0; i < 1; i++)
 24             {
 25                 ch[i].ChartAreas.Clear();
 26                 ChartArea chartArea1 = new ChartArea("C1");
 27                 ch[i].ChartAreas.Add(chartArea1);
 28                 //定义存储和显示点的容器
 29                 ch[i].Series.Clear();
 30                 Series series1 = new Series("S1");
 31                 series1.ChartArea = "C1";
 32                 ch[i].Series.Add(series1);
 33
 34                 ch[i].ChartAreas[0].AxisY.IsStartedFromZero = false;
 35                 ch[i].Legends[0].Enabled = false;
 36
 37                 ch[i].ChartAreas[0].AxisX.Interval = 1;
 38                 ch[i].ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver;
 39                 ch[i].ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.Silver;
 40                 //设置标题
 41                 ch[i].Titles.Clear();
 42                 ch[i].Titles.Add("S01");
 43                 ch[i].Titles[0].Text = "通道" + (i + 1) + " 折线图显示";
 44                 ch[i].Titles[0].ForeColor = Color.RoyalBlue;
 45                 ch[i].Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
 46                 //设置图表显示样式
 47                 ch[i].Series[0].Color = Color.Red;
 48                 //this.chart1.Titles[0].Text = string.Format("{0}折线图显示", );
 49                 ch[i].Series[0].ChartType = SeriesChartType.FastLine;
 50                 ch[i].Series[0].Points.Clear();
 51             }
 52         }
 53
 54         private void button1_Click(object sender, EventArgs e)
 55         {
 56
 57             List<string> xData = new List<string>() ;
 58             for (int i = 0; i < 90; i++)
 59             {
 60                 xData.Add("A" + i.ToString());
 61             }
 62
 63             List<int> yData = new List<int>() ;
 64             for (int i = 0; i < 90; i++)
 65             {
 66                 yData.Add(Convert.ToInt32 (Math.Sin(i)));
 67             }
 68             Stopwatch sw = new Stopwatch();
 69             sw.Start();
 70             chart1.Series[0]["PieLabelStyle"] = "Outside";//将文字移到外侧
 71             chart1.Series[0]["PieLineColor"] = "Black";//绘制黑色的连线。
 72             chart1.Series[0].Points.DataBindXY(xData, yData);
 73             sw.Stop();
 74             label1.Text = sw.ElapsedMilliseconds.ToString("0000");
 75         }
 76
 77
 78         private void Form1_Load(object sender, EventArgs e)
 79         {
 80             //双缓冲参考https://blog.csdn.net/kasama1953/article/details/51637617
 81             this.DoubleBuffered = true;//设置本窗体
 82             SetStyle(ControlStyles.UserPaint, true);
 83             SetStyle(ControlStyles.AllPaintingInWmPaint, true); // 禁止擦除背景.
 84             SetStyle(ControlStyles.DoubleBuffer, true); // 双缓冲
 85
 86             InitChart();
 87             for (int i = 0; i < 10000; i++)
 88                 dataQueue.Enqueue(i+1);
 89             for (int i = 0; i < 10000; i++)
 90             {
 91                 lis.Add(i);
 92                 //if (i == 5)
 93                 //    lis.RemoveAt(0);
 94             }
 95         }
 96
 97
 98         private void button2_Click(object sender, EventArgs e)
 99         {
100             Stopwatch sw = new Stopwatch();
101             sw.Start();
102             for (int i = 0; i < lis.Count; i++)
103                 chart2.Series[0].Points.AddXY((i + 1), lis[i]);
104             sw.Stop();
105             label1.Text = sw.ElapsedMilliseconds.ToString("0000");
106         }
107
108
109         private void button3_Click(object sender, EventArgs e)
110         {
111             Stopwatch sw = new Stopwatch();
112             sw.Start();
113             string[] month = new string[12] { "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月" };
114             float[] d = new float[12] { 20.5f, 60, 10.8f, 15.6f, 30, 70.9f, 50.3f, 30.7f, 70, 50.4f, 30.8f, 20 };
115             //画图初始化
116             Bitmap bmap = new Bitmap(500, 500);
117             Graphics gph = Graphics.FromImage(bmap);
118             gph.Clear(Color.White);
119             PointF cpt = new PointF(40, 420);//中心点
120             PointF[] xpt = new PointF[3] { new PointF(cpt.Y + 15, cpt.Y), new PointF(cpt.Y, cpt.Y - 8), new PointF(cpt.Y, cpt.Y + 8) };//x轴三角形
121             PointF[] ypt = new PointF[3] { new PointF(cpt.X, cpt.X - 15), new PointF(cpt.X - 8, cpt.X), new PointF(cpt.X + 8, cpt.X) };//y轴三角形
122             gph.DrawString("某工厂某产品月生产量图表", new Font("宋体", 14), Brushes.Black, new PointF(cpt.X + 60, cpt.X));//图表标题
123             //画x轴
124             gph.DrawLine(Pens.Black, cpt.X, cpt.Y, cpt.Y, cpt.Y);
125             gph.DrawPolygon(Pens.Black, xpt);
126             gph.FillPolygon(new SolidBrush(Color.Black), xpt);
127             gph.DrawString("月份", new Font("宋体", 12), Brushes.Black, new PointF(cpt.Y + 10, cpt.Y + 10));
128             //画y轴
129             gph.DrawLine(Pens.Black, cpt.X, cpt.Y, cpt.X, cpt.X);
130             gph.DrawPolygon(Pens.Black, ypt);
131             gph.FillPolygon(new SolidBrush(Color.Black), ypt);
132             gph.DrawString("单位(万)", new Font("宋体", 12), Brushes.Black, new PointF(0, 7));
133             for (int i = 1; i <= 12; i++)
134             {
135                 //画y轴刻度
136                 if (i < 11)
137                 {
138                     gph.DrawString((i * 10).ToString(), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X - 30, cpt.Y - i * 30 - 6));
139                     gph.DrawLine(Pens.Black, cpt.X - 3, cpt.Y - i * 30, cpt.X, cpt.Y - i * 30);
140                 }
141                 //画x轴项目
142                 gph.DrawString(month[i - 1].Substring(0, 1), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X + i * 30 - 5, cpt.Y + 5));
143                 gph.DrawString(month[i - 1].Substring(1, 1), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X + i * 30 - 5, cpt.Y + 20));
144                 if (month[i - 1].Length > 2) gph.DrawString(month[i - 1].Substring(2, 1), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X + i * 30 - 5, cpt.Y + 35));
145                 //画点
146                 gph.DrawEllipse(Pens.Black, cpt.X + i * 30 - 1.5f, cpt.Y - d[i - 1] * 3 - 1.5f, 3, 3);
147                 gph.FillEllipse(new SolidBrush(Color.Black), cpt.X + i * 30 - 1.5f, cpt.Y - d[i - 1] * 3 - 1.5f, 3, 3);
148                 //画数值
149                 gph.DrawString(d[i - 1].ToString(), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X + i * 30, cpt.Y - d[i - 1] * 3));
150                 //画折线
151                 if (i > 1) gph.DrawLine(Pens.Red, cpt.X + (i - 1) * 30, cpt.Y - d[i - 2] * 3, cpt.X + i * 30, cpt.Y - d[i - 1] * 3);
152             }
153             //保存输出图片
154             //bmap.Save(Response.OutputStream, ImageFormat.Gif);
155             pictureBox1.Image = bmap;
156             sw.Stop();
157
158             label1.Text = sw.ElapsedMilliseconds.ToString("0000");
159
160         }
161
162         private void Form1_Paint(object sender, PaintEventArgs e)
163         {
164
165         }
166     }
167 }

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