C#-实验3

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

namespace 实验3
{
    public partial class Form1 : Form
    {
        Bitmap bitmap;
        int x, y;
        int picWidth;
        int picHeight;
        Graphics g;

        public Form1()
        {
            InitializeComponent();
            picWidth = 150;
            picHeight = 150;
        }

        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "图片文件|*.jpg;*.png;*.gif;*.bmp";
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                Bitmap srcBitmap = new Bitmap(ofd.FileName);
                bitmap = new Bitmap(srcBitmap, picWidth, picHeight);
                this.pictureBox1.Image = bitmap;
            }
        }
        //-----
        //button

        private void button2_Click(object sender, EventArgs e)
        {
            y = y - 10;
            g = this.pictureBox1.CreateGraphics();
            g.Clear(this.BackColor);
            g.DrawImage(bitmap, x, y, picWidth, picHeight);            // this.pictureBox1.Refresh(); 
        }

        private void button4_Click(object sender, EventArgs e)
        {
            x = x - 10;
            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);
            g.DrawImage(bitmap, x, y, picWidth, picHeight);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);
            g.DrawImage(bitmap, x, y, bitmap.Width / 2, bitmap.Height / 2);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);
            g.DrawImage(bitmap, x, y, bitmap.Width * 2, bitmap.Height * 2);
        }

        private void button6_Click(object sender, EventArgs e)
        {
            x = x + 10;
            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);
            g.DrawImage(bitmap, x, y, picWidth, picHeight); 
        }

        private void button5_Click(object sender, EventArgs e)
        {
            y = y + 10;
            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);
            g.DrawImage(bitmap, x, y, picWidth, picHeight); 
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

    }
}