WinFrom折线图

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 MyEillipse

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Paint(object sender, PaintEventArgs e)

        {

            //声明一个string类型的数组用于存储一年中的12个月份

            string[] month = new string[] {"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"};

            float[] d = new float[] { 20.5F,,10.8F,15.6F,,70.9F,50.3F,30.7F,,50.4F,30.8F,};

            //画图初始化

            Bitmap bMap = new Bitmap(,);

            Graphics gph = Graphics.FromImage(bMap);

            gph.Clear(Color.White);

            PointF cPt = new PointF(, );//中心点

            //X轴三角形

            PointF[] xPt = new PointF[] { new PointF(cPt.Y + , cPt.Y), new PointF(cPt.Y, cPt.Y-), new PointF(cPt.Y, cPt.Y+) };

            //Y轴三角形

            PointF[] yPt = new PointF[] { new PointF(cPt.X, cPt.X - ), new PointF(cPt.X - , cPt.X), new PointF(cPt.X + , cPt.X) };

            gph.DrawString("某工厂某产品月生产量图表",new Font("宋体",),Brushes.Black,new PointF(cPt.X+,cPt.X));

            //X轴

            gph.DrawLine(Pens.Black, cPt.X, cPt.Y, cPt.Y, cPt.Y);

            gph.DrawPolygon(Pens.Black, xPt);

            gph.FillPolygon(new SolidBrush(Color.Black), xPt);

            gph.DrawString("月份", new Font("宋体", ), Brushes.Black, new PointF(cPt.Y + , cPt.Y + ));

            //Y轴

            gph.DrawLine(Pens.Black, cPt.X, cPt.Y, cPt.X, cPt.X);

            gph.DrawPolygon(Pens.Black, yPt);

            gph.FillPolygon(new SolidBrush(Color.Black), yPt);

            gph.DrawString("单位(万)", new Font("宋体", ), Brushes.Black, new PointF(,));

            for (int i = ; i <=; i++)

            {

                //画Y轴刻度

                if (i < )

                {

                    gph.DrawString((i * ).ToString(), new Font("宋体", ), Brushes.Black, new PointF(cPt.X - , cPt.Y - i *  - ));

                    gph.DrawLine(Pens.Black, cPt.X - , cPt.Y - i * , cPt.X, cPt.Y - i * );

                }

                //画X轴

                gph.DrawString(month[i - ].Substring(, ), new Font("宋体", ), Brushes.Black, new PointF(cPt.X + i *  - , cPt.Y + ));

                gph.DrawString(month[i - ].Substring(, ), new Font("宋体", ), Brushes.Black, new PointF(cPt.X + i *  - , cPt.Y + ));

                if (month[i - ].Length>)

                    gph.DrawString(month[i-].Substring(,),new Font("宋体",),Brushes.Black,new PointF(cPt.X+i*-,cPt.Y+));

                //画点

                gph.DrawEllipse(Pens.Black,cPt.X+i*-1.5F,cPt.Y-d[i-]*-1.5F,,);

                gph.FillEllipse(new SolidBrush(Color.Black),cPt.X+i*-1.5F,cPt.Y-d[i-]*-1.5F,,);

                //画数值

                gph.DrawString(d[i - ].ToString(), new Font("宋体", ), Brushes.Black, new PointF(cPt.X + i * , cPt.Y - d[i - ] * ));

                //画折线

                if(i>) gph.DrawLine(Pens.Red,cPt.X+(i-)*,cPt.Y-d[i-]*,cPt.X+i*,cPt.Y-d[i-]*);

            }

            pictureBox1.Image = bMap;

        }

    }

}