C#模拟QQ截图（转）

 
using System;
 
using System.Collections.Generic;
 
using System.ComponentModel;
 
using System.Data;
 
using System.Drawing;
 
using System.Text;
 
using System.Windows.Forms;
 
namespace simulationQQ
 
{
 
    public partial class Form1 : Form
 
    {
 
        public Form1()
 
        {
 
            InitializeComponent();
 
        }
 
        //public event copyToFatherTextBox copytoFather;  //截屏完毕后交个父窗体处理截图
 
        public bool begin = false;   //是否开始截屏
 
        public bool isDoubleClick = false;
 
        public Point firstPoint = new Point(0, 0);  //鼠标第一点
 
        public Point secondPoint = new Point(0, 0);  //鼠标第二点
 
        public Image cachImage = null;  //用来缓存截获的屏幕
 
        public int halfWidth = 0;//保存屏幕一半的宽度
 
        public int halfHeight = 0;//保存屏幕一般的高度
 
        /*复制整个屏幕,并让窗体填充屏幕*/
 
        public void copyScreen()
 
        {
 
            Rectangle r = Screen.PrimaryScreen.Bounds;
 
            Image img = new Bitmap(r.Width, r.Height);
 
            Graphics g = Graphics.FromImage(img);
 
            g.CopyFromScreen(new Point(0, 0), new Point(0, 0), r.Size);
 
            //窗体最大化，及相关处理
 
            this.Width = r.Width;
 
            this.Height = r.Height;
 
            this.Left = 0;
 
            this.Top = 0;
 
            pictureBox1.Width = r.Width;
 
            pictureBox1.Height = r.Height;
 
            pictureBox1.BackgroundImage = img;
 
            cachImage = img;
 
            halfWidth = r.Width / 2;
 
            halfHeight = r.Height / 2;
 
            //this.Cursor = new Cursor(GetType(), "MyCursor.cur");  
 
        }
 
        /*鼠标按下时开始截图*/
 
        private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
 
        {
 
            if(!isDoubleClick)
 
            {
 
                begin = true;
 
                firstPoint = new Point(e.X, e.Y);
 
                changePoint(e.X, e.Y);
 
                msg.Visible = true;
 
            }
 
        }
 
        /*鼠标移动时显示截取区域的边框*/
 
        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
 
        {
 
            if (begin)
 
            {
 
                //获取新的右下角坐标
 
                secondPoint = new Point(e.X, e.Y);
 
                int minX = Math.Min(firstPoint.X, secondPoint.X);
 
                int minY = Math.Min(firstPoint.Y, secondPoint.Y);
 
                int maxX = Math.Max(firstPoint.X, secondPoint.X);
 
                int maxY = Math.Max(firstPoint.Y, secondPoint.Y);
 
                //重新画背景图
 
                Image tempimage = new Bitmap(cachImage);
 
                Graphics g = Graphics.FromImage(tempimage);
 
                //画裁剪框
 
                g.DrawRectangle(new Pen(Color.Red),minX,minY,maxX-minX,maxY-minY);
 
                pictureBox1.Image = tempimage;
 
                //计算坐标信息
 
                msg.Text = "左上角坐标：(" + minX.ToString() + "," + minY.ToString() + ")/r/n";
 
                msg.Text += "右下角坐标：(" + maxX.ToString() + "," + maxY.ToString() + ")/r/n";
 
                msg.Text += "截图大小：" + (maxX - minX) + "×" + (maxY - minY) + "/r/n";
 
                msg.Text += "双击任意地方结束截屏！";
 
                changePoint((minX + maxX) / 2, (minY + maxY) / 2);
 
            }
 
        }
 
        /*动态调整显示信息的位置,输入参数为当前截屏鼠标位置*/
 
        public void changePoint(int x, int y)
 
        {
 
            if (x < halfWidth)
 
            {
 
                if (y < halfHeight)
 
                { msg.Top = halfHeight; msg.Left = halfWidth; }
 
                else
 
                { msg.Top = 0; msg.Left = halfWidth; }
 
            }
 
            else
 
            {
 
                if (y < halfHeight)
 
                { msg.Top = halfHeight; msg.Left = 0; }
 
                else
 
                { msg.Top = 0; msg.Left = 0; }
 
            }
 
        }
 
        /*鼠标放开时截图操作完成*/
 
        private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
 
        {
 
            begin = false;
 
            isDoubleClick = true; //之后再点击就是双击事件了
 
        }
 
        /*双击时截图时，通知父窗体完成截图操作，同时关闭本窗体*/
 
        private void pictureBox1_DoubleClick(object sender, EventArgs e)
 
        {
 
            if (firstPoint != secondPoint)
 
            {
 
                int minX = Math.Min(firstPoint.X, secondPoint.X);
 
                int minY = Math.Min(firstPoint.Y, secondPoint.Y);
 
                int maxX = Math.Max(firstPoint.X, secondPoint.X);
 
                int maxY = Math.Max(firstPoint.Y, secondPoint.Y);
 
                Rectangle r = new Rectangle(minX, minY, maxX - minX, maxY - minY);
 
                //copytoFather(r);
 
            }
 
            this.Close();
 
            //msg.Text = r.ToString();
 
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            copyScreen();
        }
 
    }
 
}