利用C#代码实现图片旋转360度

using system;
using system.collections.generic;
using system.drawing;
using system.io;
using system.linq;
using system.text;
namespace 图片旋转程序
{
 public class imagehelper
 {
  /// <summary> 
  /// 以逆时针为方向对图像进行旋转 
  /// </summary> 
  /// <param name="b">位图流</param> 
  /// <param name="angle">旋转角度[0,360](前台给的)</param> 
  /// <returns></returns> 
  public image rotateimg(image b, int angle, string file)
  {
   angle = angle % 360;
   //弧度转换 
   double radian = angle * math.pi / 180.0;
   double cos = math.cos(radian);
   double sin = math.sin(radian);
   //原图的宽和高 
   int w = b.width;
   int h = b.height;
   int w = (int)(math.max(math.abs(w * cos - h * sin), math.abs(w * cos + h * sin)));
   int h = (int)(math.max(math.abs(w * sin - h * cos), math.abs(w * sin + h * cos)));
   //目标位图 
   bitmap dsimage = new bitmap(w, h);
   system.drawing.graphics g = system.drawing.graphics.fromimage(dsimage);
   g.interpolationmode = system.drawing.drawing2d.interpolationmode.bilinear;
   g.smoothingmode = system.drawing.drawing2d.smoothingmode.highquality;
   //计算偏移量 
   point offset = new point((w - w) / 2, (h - h) / 2);
   //构造图像显示区域:让图像的中心与窗口的中心点一致 
   rectangle rect = new rectangle(offset.x, offset.y, w, h);
   point center = new point(rect.x + rect.width / 2, rect.y + rect.height / 2);
   g.translatetransform(center.x, center.y);
   g.rotatetransform(angle);
   //恢复图像在水平和垂直方向的平移 
   g.translatetransform(-center.x, -center.y);
   g.drawimage(b, rect);
   //重至绘图的所有变换 
   g.resettransform();
   g.save();
   g.dispose();
   //保存旋转后的图片 
   dsimage.save(@"d:\img\" + path.getfilenamewithoutextension(file) + "\\" + angle + ".png", system.drawing.imaging.imageformat.png);
   return dsimage;
  }
  public image rotateimg(string filename, int angle, string file)
  {
   return rotateimg(getsourceimg(filename), angle, file);
  }
  public image getsourceimg(string filename)
  {
   image img;
   img = bitmap.fromfile(filename);
   return img;
  } 
 }
 class program
 {
  static void main(string[] args)
  {
   string[] strarr = directory.getfiles(@"d:\img");
   foreach (string file in strarr)
   {
    console.writeline(file);   //输出e:\123\新建文本文件.txt
    console.writeline(path.getfilenamewithoutextension(file));
    //如果要保存的目录不存在,则先创建
    if (!directory.exists(@"d:\img\" + path.getfilenamewithoutextension(file)))
    {
     directory.createdirectory(@"d:\img\" + path.getfilenamewithoutextension(file));
    }
    filestream fs = new filestream(file, filemode.open, fileaccess.read);
    image img = bitmap.fromstream(fs);
    imagehelper ih = new imagehelper();
    for (int i = 1; i <= 360; i++)
    {
     ih.rotateimg(img, i, file);
    }
    fs.close();
   }
   console.readkey();
  }
 }
}

以上所述是本文的全部内容，有问题的可以和小编联系，谢谢对的支持！