C#波形图控件制作示例程序

首先添加一个timer，50s

using system;
using system.collections.generic;
using system.componentmodel;
using system.drawing;
using system.data;
using system.text;
using system.windows.forms;

namespace high_tech_watch
{
    public partial class usercontrol1 : usercontrol
    {
        public usercontrol1()
        {
            initializecomponent();
        }

        int[] oldline;
        int size = 15; //方格的大小
        pen linepen = new pen(color.fromargb(3,64, 129), 1); //背景线条颜色
        pen forelinepen = new pen(color.lightblue);  //前景线条颜色
        private void usercontrol1_paint(object sender, painteventargs e)
        {
            graphics g = e.graphics;
            int bvalue;
            bvalue = value;
            if (shake != 0)
            {
                random ro = new random();
                int r = ro.next(0, shake);
                value += (ro.next(-shake, 0) / 2) + r/2;
                if (value>100)
                {
                    value = 100;
                }
                if (value < 0)
                {
                    value = 0;
                }
            }
            int h = (int)(this.size.height / size);
            int w = (int)(this.size.width / size )+ 1;//这里加1保证了滚动时最右侧垂直线及时出现
            for (; h >= 0;h-- )
            {
                g.drawline(linepen, new point(0, h * size), new point(this.size.width, h * size));
            }
            for (; w>=0;w-- )
            {
                g.drawline(linepen, new point((w * size) - limits, 0), new point((w * size) - limits, this.size.height));
            }
            for (int i = oldline.length - 1,j = 0;i >j ;j++ )
            {
                g.drawline(forelinepen, new point(j,(this.height - (int)(((float)oldline[j] / (float)100) * (float)this.height) ) -1),
                    new point(j + 1, (this.height - (int)(((float)oldline[j+1] / (float)100) * (float)this.height))-1) );
            }
            for (int i = oldline.length - 1, j = 0; i > j; j++)
            {
                oldline[j] = oldline[j + 1];
            }
            oldline[oldline.length - 1] = value;
            pintlightpoint(e);
            value = bvalue;
        }

        private void pintlightpoint(painteventargs e)
        {
            graphics g = e.graphics;
            g.drawimage(global::high_tech_watch.resource1.未标题_2,new rectangle(new point(this.width - 50,this.height - (int)(((float)lightpointvalue / (float)100) * (float)this.height ) - 10),new size(20,20)));

        }

        int lightpointvalue = 50;
        int limits = 0;//滚动就靠他了，是一个范围
        private void timer1_tick(object sender, eventargs e)
        {
            limits++;
            if (limits >= size)
            {
                limits = 0;
            }
            this.invalidate();
        }

        private void usercontrol1_load(object sender, eventargs e)
        {

            oldline = new int[this.width - 40];

        }

        int shake = 0;
        [defaultvalue(0),description("抖动率，值控件输入的值自动抖动（禁用是为0）"),category("属性值")]
        public int shake
        {
            get{return shake;}
            set{shake = value;}
        }
        [defaultvalue(0),description("当前数值"),category("属性值")]
        public int value
        {
            get { return lightpointvalue; }
            set { lightpointvalue = value; }
        }
        [description("当前数值"), category("属性值")]
        public pen linepen
        {
            get { return linepen; }
            set
            {
                linepen = value;
                this.invalidate();
            }
        }

        private void usercontrol1_resize(object sender, eventargs e)
        {

            if ((this.width - 40) > oldline.length)
            {
                 int[] newarry = new int[this.width - 40];
                oldline.copyto(newarry, newarry.length - oldline.length);
                oldline = new int[this.width - 40];
                oldline = newarry;
            }
            if ((this.width - 40) < oldline.length)
            {
                int[] newarry = new int[this.width - 40];
                for (int i = newarry.length - 1,j = oldline.length - 1; i >=0 ;i--,j-- )
                {
                   newarry[i] = oldline[j];
                }
                oldline = new int[this.width - 40];
                oldline = newarry;
            }

        }
    }
}