No 72 · 以任意角度旋转图像

 

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace Ex13_16{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private Bitmap SourceBitmap;        private Bitmap MyBitmap;        private void button2_Click(object sender, EventArgs e)        {            //打开图像文件            OpenFileDialog openFileDialog = new OpenFileDialog();            openFileDialog.Filter = "图像文件(JPeg, Gif, Bmp, etc.)|*.jpg;*.jpeg;*.gif;*.bmp;*.tif; *.tiff; *.png| JPeg 图像文件(*.jpg;*.jpeg)|*.jpg;*.jpeg |GIF 图像文件(*.gif)|*.gif |BMP图像文件(*.bmp)|*.bmp|Tiff图像文件(*.tif;*.tiff)|*.tif;*.tiff|Png图像文件(*.png)| *.png |所有文件(*.*)|*.*";            if (openFileDialog.ShowDialog() == DialogResult.OK)            {                //得到原始大小的图像                SourceBitmap = new Bitmap(openFileDialog.FileName);                //得到缩放后的图像                MyBitmap = new Bitmap(SourceBitmap, this.pictureBox1.Width, this.pictureBox1.Height);                this.pictureBox1.Image = MyBitmap;            }        }        private void button1_Click(object sender, EventArgs e)        {            //以任意角度旋转显示图像            Graphics g = this.panel1.CreateGraphics();            float MyAngle = 0;//旋转的角度            while (MyAngle < 360)            {                TextureBrush MyBrush = new TextureBrush(MyBitmap);                this.panel1.Refresh();                MyBrush.RotateTransform(MyAngle);                g.FillRectangle(MyBrush, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height);                MyAngle += 0.5f;                System.Threading.Thread.Sleep(50);            }        }           }}