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;
        }
    }
}