Question

c#图像反转

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Drawing.Imaging;
using System.Windows.Forms;

namespace WindowsFormsApplication30
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "BMP File(*bmp)|*.bmp|GIF File(*.gif)|*.gif";
if (ofd.ShowDialog() == DialogResult.OK)
{
Bitmap image = new Bitmap(ofd.FileName);
image.Save("SaveFile.bmp", ImageFormat.Bmp);
}

}

private void button2_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
Image image = new Bitmap("SaveFile.bmp");
TextureBrush tb = new TextureBrush(image);
Pen bp = new Pen(Color.Black);
g.FillRectangle(tb,new Rectangle(0,0,300,200));
}

private void button3_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
Image image = new Bitmap("SaveFile.bmp");
TextureBrush txb = new TextureBrush(image);
Pen bp = new Pen(Color.Black);
txb.WrapMode = WrapMode.TileFlipX;
g.FillRectangle(txb,new Rectangle(0,0,200,200));
g.DrawRectangle(bp,new Rectangle(0,0,200,200));
}

}
}
button3是实现图像翻转的代码，可是为什么没有成功？？？

Answer 1

可以直接用 RotateFlip 方法进行翻转啊 ·
Bitmap box1 = new Bitmap(pictureBox1.Image);
box1.RotateFlip(RotateFlipType.Rotate180FlipX);
pictureBox1.Image = box1;
这样就能进行 180°的倒转了，当然RotateFlipType里面还有很的方法