C# 绘图求救

Question

绘图总是一个数组传递给Graphics，然后根据定义的颜色和Pen来绘制。
但是实际当中会有很多很多数据，比如每三秒中就有数据增加。那这个图该怎么绘制呢？那这个数组不是海了去了？
请大家给支招，谢谢~~

Answer 1

5万个进行绘制算多吗？http://download.csdn.net/source/1531255

Answer 2

如果不是绘制分时图的话,在同一个BitMap上反复画.在接到数据时画,不要在Paint事件中画,在Paint事件中,把图"贴"到Graphics中就可以了

Answer 3

你是要简单的绘图程序？呵呵我这这几天正好做这个
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;namespace Drawing
{
    public partial class Form1 : Form
    {
        string BoolStyle;
        Line lineObj;
        Circle circleObj;
        Rectangle rectangleObj;
        RectCircle rectcircleOjt;
        Color[] DrawColor;
        Color currentcolor;
        bool c;
        List<Line> listline = new List<Line>();
        List<Circle> listcircle = new List<Circle>();
        List<Rectangle> listrectangle = new List<Rectangle>();
        List<RectCircle> listrectcircle = new List<RectCircle>();
        public Form1()
        {
            currentcolor = Color.Black;
            DrawColor = new Color[8];
            DrawColor[0] = Color.Brown;
            DrawColor[1] = Color.Red;
            DrawColor[2] = Color.Blue;
            DrawColor[3] = Color.Orange; 
            DrawColor[4] = Color.Green;
            DrawColor[5] = Color.Yellow;
            DrawColor[6] = Color.White;
            DrawColor[7] = Color.Black;
            InitializeComponent();
        }        private void Btn1_Click(object sender, EventArgs e)
        {
            BoolStyle = "line";
        }        private void Btn2_Click(object sender, EventArgs e)
        {
            BoolStyle = "circle";
        }        private void Btn3_Click(object sender, EventArgs e)
        {
            BoolStyle = "rectangle";
        }
        private void Btn4_Click(object sender, EventArgs e)
        {
            BoolStyle = "rectcircle";
        }        private void panel1_MouseDown(object sender, MouseEventArgs e)
        {
            c = true;
            switch (BoolStyle)
            {
                case "line":
                    lineObj = new Line();
                    lineObj.SetPoint1(e.Location);
                    listline.Add(lineObj);
                    lineObj.StrokeColor = currentcolor;
                    break;
                case "circle":
                    circleObj = new Circle();
                    circleObj.SetCenterPoint(e.Location);
                    listcircle.Add(circleObj);
                    circleObj.StrokeColor = currentcolor;
                    break;
                case "rectangle":
                    rectangleObj = new Rectangle();
                    rectangleObj.SetLeftTop(e.Location);
                    listrectangle.Add(rectangleObj);
                    rectangleObj.StrokeColor = currentcolor;
                    break;
                case "rectcircle":
                    rectcircleOjt = new RectCircle();
                    listrectcircle.Add(rectcircleOjt);
                    rectcircleOjt.SetLeftTop(e.Location);
                    rectcircleOjt.StrokeColor = currentcolor;
                    break;
                default:
                    break;            }
        }        private void panel1_MouseMove(object sender, MouseEventArgs e)
        {
            if (c == true)
            {
                switch (BoolStyle)
                {
                    case "line":
                        lineObj.SetPoint2(e.Location);
                        break;
                    case "circle":
                        circleObj.SetRadius(e.Location);
                        break;
                    case "rectangle":
                        rectangleObj.SetRightBottom(e.Location);
                        break;
                    case "rectcircle":
                        rectcircleOjt.SetRightBottom(e.Location);
                        break;
                    default:
                        break;                }
            }
            panel1.Refresh();
        }        private void panel1_MouseUp(object sender, MouseEventArgs e)
        {
            c = false;            switch (BoolStyle)
            {
                case "line":                    lineObj = null;
                    break;
                case "circle":
                    circleObj = null;
                    break;
                case "rectangle":
                    rectangleObj = null;
                    break;
                case"rectcircle":
                    rectcircleOjt = null;
                    break;
                default:
                    break;            }        }        private void panel1_Paint(object sender, PaintEventArgs e)
        {
          /*  if (x)
            {
                switch (BoolStyle)
                {
                    case "line":    
                        lineObj.Draw(e.Graphics);
                        break;
                    case "circle":
                        circleObj.Draw(e.Graphics);
                        break;
                    case "rectangle":
                        rectangleObj.Draw(e.Graphics);
                        break;
                    default :
                        break;                }
            }*/
            Graphics g = e.Graphics;
            for (int i=0;i<listline.Count;i++)
                listline[i].Draw(g);
                    
            foreach(Circle circle in listcircle)
            {
                circle.Draw(e.Graphics);
            }
            foreach(Rectangle rectangle in listrectangle)
            {
                rectangle.Draw(e.Graphics);
            }
            foreach (RectCircle rectcircle in listrectcircle) 
            {
                rectcircle.Draw(e.Graphics);
            }
        }        private void panel2_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            g.FillRectangle(new SolidBrush(currentcolor), 20, 0, 30, 20);
            g.DrawRectangle(new Pen(Color.Black), 20, 0, 30, 20);
            int x=80;
            for (int i=0;i<DrawColor.Length;i++)
            {
                g.FillRectangle(new SolidBrush(DrawColor[i]), x, 0, 30, 20);
                g.DrawRectangle(new Pen(Color.Black), 20, 0, 30, 20);
                x += 30;
            }
            
        }      /*  private void panel2_Click(object sender, EventArgs e)
        {
            int x = e.X;
            int y = e.Y;
            if (x>80&&y<30)
            {
                int colorindex = (x - 80) / 30;
                if (colorindex < DrawColor.Length)
                {
                    currentcolor = DrawColor[colorindex];
                }
            }
            panel2.Refresh();
        }*/        private void panel2_MouseClick(object sender, MouseEventArgs e)
        {
            int x = e.X;
            int y = e.Y;
            if (x > 80 && y < 30)
            {
                int colorindex = (x - 80) / 30;
                if (colorindex < DrawColor.Length)
                {
                    currentcolor = DrawColor[colorindex];
                }
            }
            panel2.Refresh();
        }          }}

Answer 4

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;namespace Drawing
{
    /// <summary>
    /// 直线对象
    /// </summary>
    class Line 
    {
        private int x1;
        private int y1;
        private int x2;
        private int y2;        // 线条宽度
        private int strokeWidth;        public int StrokeWidth
        {
            get { return strokeWidth; }
            set { strokeWidth = value; }
        }        // 线条颜色
        private Color strokeColor;        public Color StrokeColor
        {
            get { return strokeColor; }
            set { strokeColor = value; }
        }        public Line()
        {
            StrokeWidth = 1;
            StrokeColor = Color.Black;
        }        public void Draw(Graphics graphics)
        {
            graphics.DrawLine(new Pen(StrokeColor, StrokeWidth), x1, y1, x2, y2);
        }        public void SetPoint1(Point point)
        {
            x1 = point.X;
            y1 = point.Y;
        }        public void SetPoint2(Point point)
        {
            x2 = point.X;
            y2 = point.Y;
        }
    }
}
这是line.cs,上面那个是form.cs

Answer 5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;namespace Drawing
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}