C# Image.RotateFlip方法代码示例

Bitmap bitmap1;

private void InitializeBitmap()
{
    try
    {
        bitmap1 = (Bitmap)Bitmap.FromFile(@"C:\Documents and Settings\" + 
            @"All Users\Documents\My Music\music.bmp");
        PictureBox1.SizeMode = PictureBoxSizeMode.AutoSize;
        PictureBox1.Image = bitmap1;
    }
    catch(System.IO.FileNotFoundException)
    {
        MessageBox.Show("There was an error." + 
            "Check the path to the bitmap.");
    }
}

private void Button1_Click(System.Object sender, System.EventArgs e)
{

    if (bitmap1 != null)
    {
        bitmap1.RotateFlip(RotateFlipType.Rotate180FlipY);
        PictureBox1.Image = bitmap1;
    }
}

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow

Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace ImageFlip
{
    /// <summary>
    /// Summary description for ImageFlip.
    /// </summary>
    public class ImageFlip : System.Windows.Forms.Form
    {
        private System.Windows.Forms.GroupBox groupBox1;
        private System.Windows.Forms.CheckBox checkBox1;
        private System.Windows.Forms.RadioButton radioButton1;

        Image im = null;
        Image im2 = null;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.RadioButton radioButton2;
        private System.Windows.Forms.RadioButton radioButton3;

        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public ImageFlip()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            this.Text = "Flipping and Rotating";
            this.radioButton1.Checked = false;
            this.label1.Text = "";
            this.groupBox1.Text = "RotateFlipType";
            this.checkBox1.Text = "Paint";
            this.radioButton1.Text = "Rotate180FlipY";
            this.radioButton2.Text = "Rotate180FlipX";
            this.radioButton3.Text = "Rotate180FlipNone";

            this.radioButton1.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
            this.radioButton2.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
            this.radioButton3.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.groupBox1 = new System.Windows.Forms.GroupBox();
            this.radioButton1 = new System.Windows.Forms.RadioButton();
            this.checkBox1 = new System.Windows.Forms.CheckBox();
            this.label1 = new System.Windows.Forms.Label();
            this.radioButton2 = new System.Windows.Forms.RadioButton();
            this.radioButton3 = new System.Windows.Forms.RadioButton();
            this.groupBox1.SuspendLayout();
            this.SuspendLayout();
            // 
            // groupBox1
            // 
            this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                                    this.radioButton3,
                                                                                    this.radioButton2,
                                                                                    this.radioButton1,
                                                                                    this.checkBox1});
            this.groupBox1.Location = new System.Drawing.Point(312, 64);
            this.groupBox1.Name = "groupBox1";
            this.groupBox1.Size = new System.Drawing.Size(248, 80);
            this.groupBox1.TabIndex = 1;
            this.groupBox1.TabStop = false;
            this.groupBox1.Text = "groupBox1";
            // 
            // radioButton1
            // 
            this.radioButton1.Location = new System.Drawing.Point(120, 16);
            this.radioButton1.Name = "radioButton1";
            this.radioButton1.Size = new System.Drawing.Size(112, 24);
            this.radioButton1.TabIndex = 1;
            this.radioButton1.Text = "radioButton1";
            // 
            // checkBox1
            // 
            this.checkBox1.Location = new System.Drawing.Point(16, 16);
            this.checkBox1.Name = "checkBox1";
            this.checkBox1.TabIndex = 0;
            this.checkBox1.Text = "checkBox1";
            this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(8, 8);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(304, 200);
            this.label1.TabIndex = 2;
            this.label1.Text = "label1";
            // 
            // radioButton2
            // 
            this.radioButton2.Location = new System.Drawing.Point(16, 48);
            this.radioButton2.Name = "radioButton2";
            this.radioButton2.TabIndex = 2;
            this.radioButton2.Text = "radioButton2";
            // 
            // radioButton3
            // 
            this.radioButton3.Location = new System.Drawing.Point(120, 48);
            this.radioButton3.Name = "radioButton3";
            this.radioButton3.Size = new System.Drawing.Size(120, 24);
            this.radioButton3.TabIndex = 3;
            this.radioButton3.Text = "radioButton3";
            // 
            // ImageFlip
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(560, 214);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.label1,
                                                                          this.groupBox1});
            this.Name = "ImageFlip";
            this.Text = "ImageFlip";
            this.groupBox1.ResumeLayout(false);
            this.ResumeLayout(false);
        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new ImageFlip());
        }
        protected override void OnPaint(PaintEventArgs e)
        {   RotateFlip();   }
        private void label1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {   RotateFlip();   }
        private void checkBox1_CheckedChanged(object sender, System.EventArgs e)
        {   RotateFlip();   }
        private void radioButtons_CheckedChanged(object sender, System.EventArgs e)
        {   RotateFlip();   }
        protected void RotateFlip()
        {
            Graphics g = Graphics.FromHwnd(this.label1.Handle);
            Brush b = new SolidBrush(this.label1.BackColor);
    
            if (this.checkBox1.Checked) 
            {
                if (im == null) ReadImage();

                Graphics g2 = Graphics.FromImage(im);  // For text "Himalaya"
                FontFamily ff = new FontFamily("Times New Roman");
                Font f = new Font(ff, 25, FontStyle.Bold);
                g2.DrawString("HIMALAYA", f, new SolidBrush(Color.Yellow), 170, 210);
                g2.Dispose();               

                im2 = (Image)im.Clone();
            
                int w2 = label1.Width/2, h2 = label1.Height/2;
                g.DrawImage(im, 0, 0, w2, h2);
        
                if(this.radioButton1.Checked)  // Rotate180FlipY
                {
                    im2.RotateFlip(RotateFlipType.Rotate180FlipY);
                    g.DrawImage(im2, w2, 0, w2, h2);
                }
                else g.FillRectangle(b, w2, 0, w2, h2);  // Clear old

                if(this.radioButton2.Checked)  // Rotate180FlipX
                {
                    im2.RotateFlip(RotateFlipType.Rotate180FlipX);
                    g.DrawImage(im2, 0, h2, w2, h2);
                }
                else g.FillRectangle(b, 0, h2, w2, h2);  // Clear old
        
                if(this.radioButton3.Checked)  // Rotate180FlipNone
                {
                    im2.RotateFlip(RotateFlipType.Rotate180FlipNone);
                    g.DrawImage(im2, w2, h2, w2, h2);  // Clear old
                }
                else g.FillRectangle(b, w2, h2, w2, h2);

                im2.Dispose();
            }
            else Clear(g);
    
            b.Dispose();    g.Dispose();
        }
        protected void ReadImage()
        {
            string path = @"Himalaya.bmp";
            im = Image.FromFile(path);
            this.radioButton1.Enabled = true;
            this.radioButton2.Enabled = true;
            this.radioButton3.Enabled = true;
        }
        protected void Clear(Graphics g)
        {
            g.Clear(this.BackColor);
            g.Dispose();        
            im = null;
            im2 = null;
            this.radioButton1.Checked = false;
            this.radioButton2.Checked = false;
            this.radioButton3.Checked = false;
            this.radioButton1.Enabled = false;
            this.radioButton2.Enabled = false;
            this.radioButton3.Enabled = false;
        }
    }
}