frmscreen.cs

条形码得使用

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

namespace CopyScreen
{
    
    public partial class frmScreen : Form
    {
        public Bitmap bmp;
        public Point pStart;
        public Point pTemp;
        public Point pMove;
        public Point p2;
        public Rectangle eara = Rectangle.Empty;
        public frmScreen(Bitmap bmp)
        {
            InitializeComponent();
            this.bmp = bmp;
            SetStyle(ControlStyles.OptimizedDoubleBuffer|ControlStyles.AllPaintingInWmPaint|ControlStyles.UserPaint,true);
            this.BackgroundImage = bmp;
        }

        private void frmScreen_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            g.DrawImage(bmp,new Point(0,0));
            
        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void frmScreen_Load(object sender, EventArgs e)
        {

        }

        private void frmScreen_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right && eara != Rectangle.Empty)
            {
                eara = Rectangle.Empty;
                pStart=Point.Empty;
                pTemp=Point.Empty;
                pMove=Point.Empty;
                p2=Point.Empty;
                this.Invalidate();
                return;
            }
            if (e.Button==MouseButtons.Right && eara==Rectangle.Empty)
            {
                this.Close();
                return;
            }
            
        }

        private void frmScreen_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left && eara == Rectangle.Empty)
            {
                pStart = new Point(e.X, e.Y);
                pTemp = pStart;
            }

        }

        private void frmScreen_MouseMove(object sender, MouseEventArgs e)
        {
           
            if (e.Button == MouseButtons.Left)
            {
                 pMove = new Point(e.X,e.Y);
                 this.Invalidate();
            }
            
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            Graphics g = e.Graphics;
            //1第二个点在pStart的右下方
            if (pTemp.X < pMove.X && pTemp.Y < pMove.Y)
            {
                pStart = pTemp;
                p2 = pMove;

            }

            //2第二个点在pStart的左下方
            if (pTemp.X > pMove.X && pTemp.Y < pMove.Y)
            {
                pStart.Y = pTemp.Y;
                pStart.X = pMove.X;
                p2.X = pTemp.X;
                p2.Y = pMove.Y;

            }
            //3第二个点在pStart的左上方
            if (pTemp.X > pMove.X && pTemp.Y > pMove.Y)
            {
                p2 = pTemp;
                pStart = pMove;
                

            }
            //4第二个点在pStart的右上方
            if (pTemp.X < pMove.X && pTemp.Y > pMove.Y)
            {
                pStart.Y = pMove.Y;
                pStart.X = pTemp.X;
                p2.Y = pTemp.Y;
                p2.X = pMove.X;



            }




            eara = new Rectangle(pStart, new Size(p2.X - pStart.X, p2.Y - pStart.Y));
            g.DrawRectangle(Pens.Green,eara);
            Brush bs=new SolidBrush(Color.FromArgb(50,Color.Gold));
            g.FillRectangle(bs,eara);

            //定义八个点
            ///
            /// 1-2-3
            /// 4-0-5
            /// 6-7-8
            ///
            //1
            Size pointSize = new Size(3,3);
            Point pRight = new Point(2, 2);
            Rectangle eara1 = new Rectangle(eara.Location.X-2,eara.Location.Y-2,5,5);
            //2
            Rectangle eara2 = new Rectangle(eara.Location.X+eara.Width/2-2,eara.Location.Y-2,5,5);
            //3
            Rectangle eara3 = new Rectangle(eara.Location.X+eara.Width-2,eara.Location.Y-2,5,5);
            //4
            Rectangle eara4 =new Rectangle(eara.Location.X-2,eara.Location.Y+eara.Height/2-2,5,5);
            //5
            Rectangle eara5 =new Rectangle(eara.Location.X+eara.Width-2,eara.Location.Y+eara.Height/2-2,5,5);
            //6          
            Rectangle eara6 = new Rectangle(eara.Location.X-2,eara.Location.Y+eara.Height-2,5,5);
            //7
            Rectangle eara7 = new Rectangle(eara.Location.X + eara.Width/2 - 2, eara.Location.Y + eara.Height - 2, 5, 5);
            //8      
            Rectangle eara8 = new Rectangle(eara.Location.X + eara.Width - 2, eara.Location.Y + eara.Height-2, 5,5);
            g.FillRectangle(Brushes.Goldenrod, eara1);
            g.FillRectangle(Brushes.Goldenrod, eara2);
            g.FillRectangle(Brushes.Goldenrod, eara3);
            g.FillRectangle(Brushes.Goldenrod, eara4);
            g.FillRectangle(Brushes.Goldenrod, eara5);
            g.FillRectangle(Brushes.Goldenrod, eara6);
            g.FillRectangle(Brushes.Goldenrod, eara7);
            g.FillRectangle(Brushes.Goldenrod, eara8);



        }

        private void frmScreen_MouseUp(object sender, MouseEventArgs e)
        {
            
            if (e.Button == MouseButtons.Left)
            {
                eara = Rectangle.Empty;
                
                this.Invalidate();

            }
        }

        private void frmScreen_DoubleClick(object sender, EventArgs e)
        {
            
            if ((eara != Rectangle.Empty) && eara.Contains(Cursor.Position))
            {

                //MessageBox.Show("保存截屏");
                Bitmap myPic = new Bitmap(eara.Width,eara.Height);
                Graphics g = Graphics.FromImage(bmp);
                myPic=bmp.Clone(eara,System.Drawing.Imaging.PixelFormat.Format32bppRgb);
                saveFileDialog1.Filter = "JPEG图像|*.jpeg|GIF图像|*.gif|PNG图像|*.png";
                if (saveFileDialog1.ShowDialog()==DialogResult.OK  )
                {
                   
                    if (saveFileDialog1.FileName.Trim()!="")
                    {
                        switch (saveFileDialog1.FilterIndex)
                        {
                            case 1:
                                myPic.Save(saveFileDialog1.FileName , System.Drawing.Imaging.ImageFormat.Jpeg);
                                break;
                            case 2:
                                myPic.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Gif);
                                break;
                            case 3:
                                myPic.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Png);
                                break;
                        }

                    }
                    else
                    {
                        MessageBox.Show("保存失败");
                    }
                   
                }
               
               
                this.Close();

            }
        }
    }
}