C# 图形界面程序：剪贴板图像处理与显示

using System.Drawing;
using System.IO;
using System.Text.RegularExpressions;
using System.Windows.Forms;

namespace WinFormImage
{
    public partial class FormImage : Form
    {
        private OpenFileDialog openFile;
        private PictureBox picture;

        public FormImage()
        {
            InitializeComponent();
            openFile = new OpenFileDialog();
            openFile.Filter = "ImageFormat (*.BMP;*.GIF;*.JPG;*.PNG)|*.bmp;*.gif;*.jpg;*.png";
            openFile.Multiselect = false;
            picture = new PictureBox();
            picture.Dock = DockStyle.Fill;
            picture.SizeMode = PictureBoxSizeMode.Zoom;
            this.Controls.Add(picture);
            this.AllowDrop = true;
            this.HelpButton = true;
            this.MaximizeBox = this.MinimizeBox = false;
            this.StartPosition = FormStartPosition.CenterScreen;
        }

        #region OnDragEnter
        protected override void OnDragEnter(DragEventArgs e)