c# 图片旋转有关问题

c# 图片旋转问题
哪位大虾有c#写的图片按任意角度旋转的代码,能否共享一下,小弟急用,先谢啦

[解决办法]
帮顶~！~~~`
[解决办法]
好像Image只能转90，180，270

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;
}

}

[解决办法]
e.Graphics.RotateTransform((float)30.0);
Image image = Image.FromFile("xxxx.jpg ");
e.Graphics.DrawImage(image, new Point(0, 0));
[解决办法]
旋转任意角度来了

/// <summary>
/// 任意角度旋转
/// </summary>
/// <param name="bmp">原始图Bitmap</param>
/// <param name="angle">旋转角度</param>
/// <param name="bkColor">背景色</param>
/// <returns>输出Bitmap</returns>
public static Bitmap KiRotate(Bitmap bmp, float angle, Color bkColor)
...{
int w = bmp.Width + 2;
int h = bmp.Height + 2;

PixelFormat pf;

if (bkColor == Color.Transparent)
...{
pf = PixelFormat.Format32bppArgb;
}
else
...{
pf = bmp.PixelFormat;
}

Bitmap tmp = new Bitmap(w, h, pf);
Graphics g = Graphics.FromImage(tmp);
g.Clear(bkColor);
g.DrawImageUnscaled(bmp, 1, 1);
g.Dispose();

GraphicsPath path = new GraphicsPath();
path.AddRectangle(new RectangleF(0f, 0f, w, h));
Matrix mtrx = new Matrix();
mtrx.Rotate(angle);
RectangleF rct = path.GetBounds(mtrx);

Bitmap dst = new Bitmap((int)rct.Width, (int)rct.Height, pf);
g = Graphics.FromImage(dst);
g.Clear(bkColor);
g.TranslateTransform(-rct.X, -rct.Y);
g.RotateTransform(angle);
g.InterpolationMode = InterpolationMode.HighQualityBilinear;
g.DrawImageUnscaled(tmp, 0, 0);
g.Dispose();

tmp.Dispose();

return dst;
}

[解决办法]
学习
[解决办法]
学习！
[解决办法]
Mark .学习
[解决办法]
任意角度旋转
http://topic.csdn.net/u/20080703/22/97cf7963-a3dc-4051-a917-a2b92f6c6abc.html
1楼我的回答
[解决办法]
Bitmap userimage=Image.FromImage("要旋转的图片的路径");
Graphics g = Graphics.FromImage(userimage);//userimage是要旋转的图片

PointF Pcenter = new PointF(userimage.Width / 2, userimage.Height / 2);//Pcenter是中心点
g.TranslateTransform(Pcenter.X, Pcenter.Y);
g.RotateTransform(Rotate);//Rotate是要旋转的角度
g.TranslateTransform(-Pcenter.X, -Pcenter.Y);
g.DrawImage(temp, x, y, w, h);//x,y,w,h代表左上角的x点坐标,y点坐标,图片的宽和高
g.ResetTransform();
return userimage;

[解决办法]

C# code

            Bitmap userimage=Image.FromImage("要旋转的图片的路径");             Graphics g = Graphics.FromImage(userimage);//userimage是要旋转的图片             PointF Pcenter = new PointF(userimage.Width / 2, userimage.Height / 2);//Pcenter是中心点             g.TranslateTransform(Pcenter.X, Pcenter.Y);             g.RotateTransform(Rotate);//Rotate是要旋转的角度             g.TranslateTransform(-Pcenter.X, -Pcenter.Y);             g.DrawImage(temp, x, y, w, h);//x,y,w,h代表左上角的x点坐标,y点坐标,图片的宽和高             g.ResetTransform();             return userimage;
[解决办法]
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;  
   }  

}  
public static Bitmap KiRotate(Bitmap bmp, float angle, Color bkColor)  
       ...{  
           int w = bmp.Width + 2;  
           int h = bmp.Height + 2;  

           PixelFormat pf;  

           if (bkColor == Color.Transparent)  
           ...{  
               pf = PixelFormat.Format32bppArgb;  
           }  
           else  
           ...{  
               pf = bmp.PixelFormat;  
           }  

           Bitmap tmp = new Bitmap(w, h, pf);  
           Graphics g = Graphics.FromImage(tmp);  
           g.Clear(bkColor);  
           g.DrawImageUnscaled(bmp, 1, 1);  
           g.Dispose();  

           GraphicsPath path = new GraphicsPath();  
           path.AddRectangle(new RectangleF(0f, 0f, w, h));  
           Matrix mtrx = new Matrix();  
           mtrx.Rotate(angle);  
           RectangleF rct = path.GetBounds(mtrx);  

           Bitmap dst = new Bitmap((int)rct.Width, (int)rct.Height, pf);  
           g = Graphics.FromImage(dst);  
           g.Clear(bkColor);  
           g.TranslateTransform(-rct.X, -rct.Y);  
           g.RotateTransform(angle);  
           g.InterpolationMode = InterpolationMode.HighQualityBilinear;  
           g.DrawImageUnscaled(tmp, 0, 0);  
           g.Dispose();  

           tmp.Dispose();  

           return dst;  
       }  
  
  
.TranslateTransform(-Pcenter.X, -Pcenter.Y);  
           g.DrawImage(temp, x, y, w, h);
           g.ResetTransform();  
           return userimage;