C# 绘制椭圆

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 绘制椭圆
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

        private void Form1_Load（object sender EventArgs e）
        {
            ShowPic（）;
            ShowPic1（）;
            ShowPic2（）;
            ShowPic3（）;
        }

        private void ShowPic（）
        {

            Bitmap bitM = new Bitmap（this.pictureBox1.Width this.pictureBox1.Height）;
                Graphics g = Graphics.FromImage（bitM）;
                g.Clear（Color.White）;
                g.DrawEllipse（new Pen（Color.Blue） 10 10 100 60）;
                this.pictureBox1.BackgroundImage = bitM;
        }
        private void ShowPic1（）
        {
            
            Bitmap bitM = new Bitmap（this.pictureBox2.Width this.pictureBox2.Height）;
            Graphics g = Graphics.FromImage（bitM）;
            g.Clear（Color.White）;
            g.DrawEllipse（new Pen（Color.Blue） 30 10 70 70）;
            this.pictureBox2.BackgroundImage = bitM;
        }

        private void ShowPic2（）
        {
            
            Bitmap bitM = new Bitmap（this.pictureBox3.Width this.pictureBox3.Height）;
            Graphics g = Graphics.FromImage（bitM）;
            g.Clear（Color.White）;
            g.DrawArc（new Pen（Color.Blue） 10 20 100 50 30 180）;
            this.pictureBox3.BackgroundImage = bitM;
        }

        private void ShowPic3（）
        {
         
            Bitmap bitM = new Bitmap（this.pictureBox4.Width this.pictureBox4.Height）;
            Graphics g = Graphics.FromImage（bitM）;
            g.Clear（Color.White）;
            g.FillPie（new SolidBrush（Color.Red）10 20 100 50 90 270）;
            g.FillPie（new SolidBrush（Color.Yellow） 10 20 100 50 90+270 90）;
            this.pictureBox4.BackgroundImage = bitM;
        }

    
      
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2020-10-24 11:00  绘制椭圆\
     目录           0  2020-10-24 11:00  绘制椭圆\Backup\
     目录           0  2020-10-24 11:00  绘制椭圆\Backup\绘制椭圆\
     文件         926  2009-02-16 08:33  绘制椭圆\Backup\绘制椭圆.sln
     文件       16384  2009-02-23 08:42  绘制椭圆\Backup\绘制椭圆.v11.suo
     文件        2119  2009-02-16 08:34  绘制椭圆\Backup\绘制椭圆\Form1.cs
     文件        4941  2009-02-16 08:34  绘制椭圆\Backup\绘制椭圆\Form1.designer.cs
     文件        5814  2009-02-16 08:33  绘制椭圆\Backup\绘制椭圆\Form1.resx
     文件         493  2009-02-16 08:32  绘制椭圆\Backup\绘制椭圆\Program.cs
     目录           0  2020-10-24 11:00  绘制椭圆\Backup\绘制椭圆\Properties\
     文件        1356  2009-02-16 08:32  绘制椭圆\Backup\绘制椭圆\Properties\AssemblyInfo.cs
     文件        2874  2009-02-16 08:32  绘制椭圆\Backup\绘制椭圆\Properties\Resources.Designer.cs
     文件        5612  2009-02-16 08:32  绘制椭圆\Backup\绘制椭圆\Properties\Resources.resx
     文件        1097  2009-02-16 08:32  绘制椭圆\Backup\绘制椭圆\Properties\Settings.Designer.cs
     文件         249  2009-02-16 08:32  绘制椭圆\Backup\绘制椭圆\Properties\Settings.settings
     文件        3770  2009-02-16 08:34  绘制椭圆\Backup\绘制椭圆\绘制椭圆.csproj
     文件       25906  2020-10-24 11:00  绘制椭圆\UpgradeLog.htm
     文件        6744  2020-10-24 11:00  绘制椭圆\UpgradeLog.xml
     目录           0  2020-10-24 11:00  绘制椭圆\_UpgradeReport_Files\
     文件        2229  2020-10-24 11:00  绘制椭圆\_UpgradeReport_Files\UpgradeReport.css
     文件       22214  2012-07-26 20:25  绘制椭圆\_UpgradeReport_Files\UpgradeReport.xslt
     文件         397  2020-10-24 11:00  绘制椭圆\_UpgradeReport_Files\UpgradeReport_Error.png
     文件         338  2020-10-24 11:00  绘制椭圆\_UpgradeReport_Files\UpgradeReport_Information.png
     文件         381  2020-10-24 11:00  绘制椭圆\_UpgradeReport_Files\UpgradeReport_Success.png
     文件         292  2020-10-24 11:00  绘制椭圆\_UpgradeReport_Files\UpgradeReport_Warning.png
     目录           0  2019-02-08 12:36  绘制椭圆\绘制椭圆\
     文件         926  2020-10-24 11:00  绘制椭圆\绘制椭圆.sln
     文件       16384  2009-02-23 08:42  绘制椭圆\绘制椭圆.suo
     文件       29696  2020-10-24 11:01  绘制椭圆\绘制椭圆.v11.suo
     目录           0  2019-02-08 12:36  绘制椭圆\绘制椭圆\bin\
     目录           0  2019-02-08 12:36  绘制椭圆\绘制椭圆\bin\Debug\
............此处省略27个文件信息