ClipImage

using System;
using System.Threading;
using System.Windows.Forms;

namespace ClipImage
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            #region Mutex
            bool isCreated; // 互斥体名称须唯一。
            using (Mutex newMutex = new Mutex(true, @"Local/ClipImage", out isCreated))
            {
                if (isCreated)
                {
                    Application.EnableVisualStyles();
                    Application.Run(new FormImage());
                    newMutex.ReleaseMutex(); // 释放互斥体的所属权。
                }
            }
            #endregion
        }
    }
}

 

using System;
using System.Drawing;
using System.Windows.Forms;

namespace ClipImage
{
    public partial class FormImage : Form
    {
        #region
        private Point position;
        private Rectangle clip;
        #endregion

        public FormImage()
        {
            #region
            InitializeComponent();
            this.TopMost = true; // 前端显示。
            this.ShowInTaskbar = false; // 在 Windows 任务栏中隐藏窗体。
            this.DoubleBuffered = true; // 双缓冲绘制图形。
            this.FormBorderStyle = FormBorderStyle.None; // 窗体无边框。
            this.Bounds = Screen.GetBounds(this); // 获取显示器的边界。
            this.TransparencyKey = this.BackColor; // 窗体背景透明化。
            NotifyIcon notify = new NotifyIcon(this.components);
            notify.Visible = true;
            notify.Icon = Icon.ExtractAssociatedIcon(Application.ExecutablePath);
            notify.Text = AppDomain.CurrentDomain.FriendlyName;
            notify.ShowBalloonTip(1, Application.CompanyName, Application.ProductName, ToolTipIcon.Info);
            notify.MouseClick += new MouseEventHandler(notify_MouseClick);
            Environment.CurrentDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);
            #endregion
        }

        #region OnMouseDown
        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
            switch (e.Button)
            {
                case MouseButtons.Left:
                    position = e.Location;
                    break;
                case MouseButtons.Right:
                    if (clip.Width > 1 && clip.Height > 1)
                    {
                        clip.Offset(1, 1);
                        using (Bitmap bmp = new Bitmap(--clip.Width, --clip.Height))
                        using (Graphics g = Graphics.FromImage(bmp))
                        {
                            g.CopyFromScreen(clip.Location, Point.Empty, clip.Size);
                            bmp.Save(string.Format("{0:HH.mm.ss}.png", DateTime.Now));
                            Clipboard.SetImage(bmp);
                        }
                        System.Diagnostics.Process.Start(Environment.CurrentDirectory);
                    }
                    clip = Rectangle.Empty;
                    BackgroundImage.Dispose();
                    BackgroundImage = null;
                    break;
            }
        }
        #endregion

        #region OnMouseMove
        protected override void OnMouseMove(MouseEventArgs e)
        {
            base.OnMouseMove(e);
            if (e.Button == MouseButtons.Left)
            {
                clip.X = Math.Min(position.X, e.X);
                clip.Y = Math.Min(position.Y, e.Y);
                clip.Width = Math.Abs(position.X - e.X);
                clip.Height = Math.Abs(position.Y - e.Y);
                this.Refresh();
            }
        }
        #endregion

        #region OnPaint
        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            e.Graphics.DrawRectangle(Pens.Red, clip);
            e.Dispose();
        }
        #endregion

        #region NotifyIcon_MouseClick
        private void notify_MouseClick(object sender, MouseEventArgs e)
        {
            switch (e.Button)
            {
                case MouseButtons.Left:
                    this.BackgroundImage = new Bitmap(this.Width, this.Height);
                    using (Graphics g = Graphics.FromImage(this.BackgroundImage))
                    {
                        g.CopyFromScreen(Point.Empty, Point.Empty, this.Size);
                    }
                    this.Activate();
                    break;
                case MouseButtons.Right:
                    Application.Exit();
                    break;
            }
        }
        #endregion
    }
}

 

namespace ClipImage
{
    partial class FormImage
    {
        private System.ComponentModel.IContainer components = null;

        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
        }
    }
}