C#—绘制图形

小灰灰 2022-08-23 05:46 257阅读 0赞

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 实例7_7绘制图形
    {
        public partial class FirstForm : Form
        {
            public FirstForm()
            {
                InitializeComponent();
            }
    
            private void button1_Click(object sender, EventArgs e)
            {
                Form1 f1 = new Form1();
                f1.Show();
            }
    
            private void button2_Click(object sender, EventArgs e)
            {
                实例7_8绘制矩形  form8=new 实例7_8绘制矩形 ();
                form8.Show();
            }
    
            private void button3_Click(object sender, EventArgs e)
            {
                实例7_9绘制平滑曲线 form9 = new 实例7_9绘制平滑曲线();
                form9.Show();
            }
    
            private void button4_Click(object sender, EventArgs e)
            {
                实例7_10绘制贝塞尔曲线 form10 = new 实例7_10绘制贝塞尔曲线();
                form10.Show();
            }
    
            private void button5_Click(object sender, EventArgs e)
            {
                实例7_11绘制多边形 form11 = new 实例7_11绘制多边形();
                form11.Show();
            }
    
            private void button6_Click(object sender, EventArgs e)
            {
                实例7_12绘制椭圆 form12 = new 实例7_12绘制椭圆();
                form12.Show();
            }
    
            private void button7_Click(object sender, EventArgs e)
            {
                实例7_13绘制文字 form13 = new 实例7_13绘制文字();
                form13.Show();
            }
    
            private void button8_Click(object sender, EventArgs e)
            {
                实例7_14显示图像 form14 = new 实例7_14显示图像();
                form14.Show();
            }
    
            private void button9_Click(object sender, EventArgs e)
            {
                实例7_15刷新图像 form15 = new 实例7_15刷新图像();
                form15.Show();
            }
    
            private void button10_Click(object sender, EventArgs e)
            {
                绘制柱形图 formZX = new 绘制柱形图();
                formZX.Show();
            }
    
            private void button11_Click(object sender, EventArgs e)
            {
                验证码 yzm = new 验证码();
                yzm.Show();
            }
    
            private void FirstForm_Load(object sender, EventArgs e)
            {
    
            } 
        }
    }

![Center][]

/*
     * 使用DrawLine和DrawLines绘制直线。
     */
    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 实例7_7绘制图形
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
    
            private void Form1_Paint(object sender, PaintEventArgs e)
            {
                Graphics g = e.Graphics;
                Pen p = new Pen(Color.Black, 2.5f);
                g.DrawLine(p, new Point(50, 10), new Point(250, 10));
                Point[] points = { new Point(50,20),new Point(250,20),
                                    new Point(250,70), new Point(50,20)};
                g.DrawLines(p, points  );
                g.Dispose();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
    
            }
        }
    }

运行结果：

![Center 1][]

/*
     * 使用DrawRectangle、FillRectangle方法绘制、填充矩形轮廓。
     */
    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 实例7_8绘制矩形
    {
        public partial class 实例7_8绘制矩形 : Form
        {
            public 实例7_8绘制矩形()
            {
                InitializeComponent();
            }
    
            private void 实例7_8绘制矩形_Paint(object sender, PaintEventArgs e)
            {
                Graphics g = e.Graphics;
                Pen p = new Pen(Color.Black, 2.0f);
                Rectangle rct1 = new Rectangle(new Point(10, 10), new Size(80, 40));
                g.DrawRectangle(p, rct1);         //绘制矩形轮廓
                //充填矩形区域
                Rectangle rct2 = new Rectangle(new Point(100, 80), new Size(200, 50));
                SolidBrush brush = new SolidBrush(Color.Blue);
                g.FillRectangle(brush, rct2);
                g.Dispose();
    
            }
    
            private void 实例7_8绘制矩形_Load(object sender, EventArgs e)
            {
                this.Text = "实例7-8绘制矩形";
            }
        }
    }

运行结果：  
![Center 2][]

/*
     * 使用DrawCurve方法绘制平滑曲线。
     */
    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 实例7_7绘制图形
    {
        public partial class 实例7_9绘制平滑曲线 : Form
        {
            public 实例7_9绘制平滑曲线()
            {
                InitializeComponent();
            }
    
            private void 实例7_9绘制平滑曲线_Paint(object sender, PaintEventArgs e)
            {
                Graphics g = e.Graphics;
                //绘制平滑曲线
                Pen p = new Pen(Color.Black, 2.0f);
                Point[] points = {new Point(50,100), new Point(100, 20),
                                 new Point(200, 100), new Point(250, 20), new Point(300, 75) };
                g.DrawCurve(p, points, 0.8f);
                g.Dispose();
            }
    
            private void 实例7_9绘制平滑曲线_Load(object sender, EventArgs e)
            {
    
            }
        }
    }

运行结果；

![Center 3][]

//绘制贝塞尔曲线
    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 实例7_7绘制图形
    {
        public partial class 实例7_10绘制贝塞尔曲线 : Form
        {
            public 实例7_10绘制贝塞尔曲线()
            {
                InitializeComponent();
            }
    
            private void 实例7_10绘制贝塞尔曲线_Paint(object sender, PaintEventArgs e)
            {
                Graphics g = e.Graphics;
                //绘制贝塞尔曲线
                Pen p = new Pen(Color.Black, 2.0f);
                Point p1 = new Point(50, 100);
                Point p2 = new Point(100, 20);
                Point p3 = new Point(200, 200);
                Point p4 = new Point(250, 80);
                g.DrawBezier(p, p1, p2, p3, p4);
                g.Dispose();
    
            }
    
            private void 实例7_10绘制贝塞尔曲线_Load(object sender, EventArgs e)
            {
    
            }
        }
    }

运行结果：

![Center 4][]

//绘制、填充多边形
    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 实例7_7绘制图形
    {
        public partial class 实例7_11绘制多边形 : Form
        {
            public 实例7_11绘制多边形()
            {
                InitializeComponent();
            }
    
            private void 实例7_11绘制多边形_Paint(object sender, PaintEventArgs e)
            {
                Graphics g = e.Graphics;
                //绘制多边形轮廓
                Pen p = new Pen(Color.Black, 2.0f);
                g.DrawPolygon(p, new Point[]{
                             new Point(20,20),
                             new Point(120,20),
                             new Point(70,70),
                             new Point(20,20)});
                //充填多边形区域
                SolidBrush brush = new SolidBrush(Color.Blue);
                Point[] points = {new Point(150,70), new Point(250,70),
                                  new Point(200,20), new Point(150,70) };
                g.FillPolygon(brush, points );
                g.Dispose();
            }
    
            private void 实例7_11绘制多边形_Load(object sender, EventArgs e)
            {
    
            }
        }
    }

运行结果：  
![Center 5][]

//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 实例7_7绘制图形
    {
        public partial class 实例7_12绘制椭圆 : Form
        {
            public 实例7_12绘制椭圆()
            {
                InitializeComponent();
            }
    
            private void 实例7_12绘制椭圆_Paint(object sender, PaintEventArgs e)
            {
                Graphics g = e.Graphics;
                Pen p = new Pen(Color.Black, 2.0f);
                g.DrawEllipse(p, new Rectangle(30, 30, 100, 60));     //绘制椭圆
                SolidBrush brush = new SolidBrush(Color.Blue);
                g.FillEllipse(brush, new Rectangle(180, 60, 100, 60));  //填充椭圆
                g.Dispose();
    
            }
    
            private void 实例7_12绘制椭圆_Load(object sender, EventArgs e)
            {
    
            }
        }
    }

运行结果：

![Center 6][]

//绘制文字，该文字由图片填充。
    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;
    using System.Drawing.Drawing2D ;
    
    namespace 实例7_7绘制图形
    {
        public partial class 实例7_13绘制文字 : Form
        {
            public 实例7_13绘制文字()
            {
                InitializeComponent();
            }
    
            private void 实例7_13绘制文字_Paint(object sender, PaintEventArgs e)
            {
                Graphics g = e.Graphics;
                Image image = Image.FromFile(Application.StartupPath + @"\p01.jpg");
                TextureBrush brush = new TextureBrush(image );
                //创建字体
                Font font = new Font("黑体", 60, FontStyle.Underline ^ FontStyle.Bold);
                g.DrawString("烟台大学", font, brush, new Point(10, 10));
                g.Dispose();
            }
    
            private void 实例7_13绘制文字_Load(object sender, EventArgs e)
            {
    
            }
        }
    }

运行结果：  
  
![Center 7][]

/*
     * 显示图像和保存图像。
     */
    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 实例7_7绘制图形
    {
        public partial class 实例7_14显示图像 : Form
        {
            public 实例7_14显示图像()
            {
                InitializeComponent();
            }
            Graphics g;
            Bitmap bitmap ;
            private void button1_Click(object sender, EventArgs e)
            {
                g = pictureBox1.CreateGraphics();
                bitmap = new Bitmap(Application.StartupPath + @"\p01.jpg");
                g.DrawImage(bitmap, 0, 0);     //从PictureBox1控件的左上角开始绘制
                bitmap.Dispose();
                g.Dispose();
    
            }
    
            private void button2_Click(object sender, EventArgs e)
            {
                bitmap  = new Bitmap(Application.StartupPath +  @"\p01.jpg ");
                Bitmap image = new Bitmap(pictureBox1.Width ,pictureBox1.Height );    //以图片框的高度和宽度保存图像
                g = Graphics.FromImage(image);
                g.DrawImage(bitmap, 0,0);
                image.Save(@"D:\p01.gif", System.Drawing.Imaging.ImageFormat.Gif);
                bitmap.Dispose();
                image.Dispose();
                g.Dispose();
    
            }
    
            private void 实例7_14显示图像_Load(object sender, EventArgs e)
            {
    
            }
        }
    }

运行结果：  
![Center 8][]

//刷新图像。
    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 实例7_7绘制图形
    {
        public partial class 实例7_15刷新图像 : Form
        {
            public 实例7_15刷新图像()
            {
                InitializeComponent();
            }
            Bitmap bitmap;
            Graphics g;
            private void button1_Click(object sender, EventArgs e)
            {
                bitmap = new Bitmap(pictureBox1.Width, pictureBox1.Height);
                pictureBox1.BackgroundImage = bitmap;
                g = Graphics.FromImage(bitmap);
                g.Clear(pictureBox1.BackColor);
                Pen  pen=new Pen (Color.Red ,3.0f );
                Point p1 = new Point(10, 10);
                Point p2 = new Point(150, 100);
                g.DrawLine(pen, p1, p2);
                g.Dispose();
            }
    
            private void button2_Click(object sender, EventArgs e)
            {
                bitmap = new Bitmap(pictureBox1.Width, pictureBox1.Height);
                pictureBox1.BackgroundImage = bitmap;
                g = Graphics.FromImage(bitmap);
                g.Clear(pictureBox1.BackColor);           
                Pen pen = new Pen(Color.Red, 3.0f);
                Rectangle rec = new Rectangle(0, 0, 100, 100);
                g.DrawEllipse(pen, rec);
                g.Dispose();
            }
    
           
    
            private void 实例7_15刷新图像_Load(object sender, EventArgs e)
            {
              
            }
        }
    }

运行结果：

![Center 9][]

[Center]: /images/20220721/81d95db9218b41108b4a27f879c8314f.png
[Center 1]: /images/20220721/a82153f546d74018ab0c1d653867bfe1.png
[Center 2]: /images/20220721/0c64e9b056a341ad8ad1ead40903db28.png
[Center 3]: /images/20220721/7f12eb7532b44f7d8d26c29930044b85.png
[Center 4]: /images/20220721/f36d20078ef94f65a016b790a95ac7da.png
[Center 5]: /images/20220721/619d7efb4a284885addc4c8aefac5724.png
[Center 6]: /images/20220721/f2d4723a2d784356bc68b04f43f7e047.png
[Center 7]: /images/20220721/85aece22e53b411e8f31fbe435edda23.png
[Center 8]: /images/20220721/d78651d679ba4de5a884a6e5eba7261b.png
[Center 9]: /images/20220721/267cbf6b40de4f0a956a88091e59bbfb.png