c#怎么画坐标图？

Question

我是C#新手，本来一直用c的，老师新出的题目，必须用C#搞定，baidu了半天，也没找到门路我想实现这样的功能画出x和Y的坐标图。用平滑曲线连接麻烦给我一个例子看下，最好是在FORM里的  谢谢了

Answer 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;namespace Test
{
    public partial class frmMain : Form
    {  
        const int DrawStep = 20;
        public frmMain()
        {
            InitializeComponent();
        }        private void Form1_Load(object sender, EventArgs e)
        {
        }
        protected override void OnPaint(PaintEventArgs e)
        {
            Pen myPen = new Pen(Color.Red, 1);
            myPen.EndCap = LineCap.ArrowAnchor;
            e.Graphics.DrawLine(myPen, 30, this.Height / 2, this.Width-30, this.Height / 2);
            e.Graphics.DrawLine(myPen, this.Width/2, this.Height-20, this.Width/2,20);
          
            int ndrawCount = Width / (2*DrawStep);
            // Create string to draw.
             String drawString = "";
            SolidBrush drawBrush = new SolidBrush(Color.Black);            for (int i = 1; i < ndrawCount-1; ++i)
            {
                drawString = i.ToString();
                e.Graphics.DrawLine(myPen,
                    Width / 2 + DrawStep * i,
                    this.Height / 2,
                    Width / 2 + DrawStep * i, 
                    this.Height / 2 - 3);
                // Create font and brush.
                Font drawFont = new Font("Arial", 12);
                // Create point for upper-left corner of drawing.
                PointF drawPoint = new PointF(Width / 2 + DrawStep * i-8, this.Height / 2+1);
                // Draw string to screen.
                e.Graphics.DrawString(drawString, drawFont, drawBrush, drawPoint);            }
             base.OnPaint(e);
        } 
    }由于时间仓促写了点,可以看到X轴正方向有坐标和数字标注了

Answer 2

参考http://bingning.net/free/source/graphics/index.html