Question

用c#将图像旋转180度，90度

这是我近期的任务，希望大虾能帮帮忙

Answer 1

使用RotateFlip方法,具体参看MSDN
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;
}

}