旋转图片并显示RotateFlip

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Linq;
using System.Windows.Forms;

namespace RevolveJPG
{
public partial class Frm_Main : Form
{
public Frm_Main()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "*.jpg|*.jpg"; //设置图片的类型
openFileDialog1.ShowDialog(); //打开文件对话框
Image myImage = System.Drawing.Image.FromFile(openFileDialog1.FileName); //实例化Image类
pictureBox1.Image = myImage; //显示打开的图片
}

private void button2_Click(object sender, EventArgs e)
{
Image myImage = pictureBox1.Image; //实例化Image类
myImage.RotateFlip(RotateFlipType.Rotate90FlipXY); //调用RotateFlip方法将JPG格式图像进行旋转
pictureBox1.Image = myImage; //显示旋转后的图片
}
}
}