C#绘制采用数据曲线图

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;



namespace WindowsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }



        private List<byte> 数据采样= new List<byte>();

        private int 网格偏移= 0;

        private Random 随机数= new Random();

        private const int 网格大小= 12;

        private Pen 网格颜色= new Pen(Color.FromArgb(0x00, 0x80, 0x40));

        private Pen 曲线颜色= new Pen(Color.FromArgb(0x00, 0xFF, 0x00));

        private void timer1_Tick(object sender, EventArgs e)

        {

            while (数据采样.Count > 1000) 数据采样.RemoveAt(0);

            数据采样.Add((byte)随机数.Next(256));

            网格偏移= (网格偏移+ 1) % 网格大小;

            Invalidate();

        }



        private void Form1_Paint(object sender, PaintEventArgs e)

        {

            e.Graphics.FillRectangle(Brushes.Black, e.Graphics.ClipBounds);

            #region 绘制网格

            for (int i = ClientSize.Width - 网格偏移; i >= 0; i -= 网格大小)

                e.Graphics.DrawLine(网格颜色, i, 0, i, ClientSize.Height);

            for (int i = ClientSize.Height; i >= 0; i -= 网格大小)

                e.Graphics.DrawLine(网格颜色, 0, i, ClientSize.Width, i);

            #endregion



            #region 绘制曲线

            if (数据采样.Count <= 1) return; // 一个数据就不绘制了

            byte A = 数据采样[数据采样.Count - 1];

            for (int i = 数据采样.Count - 2; i >= 0; i--)

            {

                byte B = 数据采样[i];

                e.Graphics.DrawLine(曲线颜色,

                    new Point(ClientSize.Width - 数据采样.Count + i - 1,

                        (int)(((double)A / 255) * ClientSize.Height)),

                    new Point(ClientSize.Width - 数据采样.Count + i,

                        (int)(((double)B / 255) * ClientSize.Height)));

                A = B;

            }

            #endregion

        }



        private void Form1_Resize(object sender, EventArgs e)

        {

            Invalidate();

        }



        private void Form1_Load(object sender, EventArgs e)

        {

            DoubleBuffered = true;

            timer1.Enabled = true;

            timer1.Interval = 100;

        }

    }

}