C#截屏程序实现（随笔日记）

主窗体代码，其实就是一个winform窗体，去掉border，全屏展示屏幕的截屏，在winform上划取矩形然后按坐标截图 生成图片，呵呵 工作之余的小玩具

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Drawing.Imaging;using System.Drawing.Drawing2D;namespace CJT{ public enum enmuFX { 左边框 = 0, 右边框 = 1, 上边框 = 2, 下边框 = 3, 左上角 = 4, 右上角 = 5, 左下角 = 6, 右下角 = 7 } //问题点1：画框重绘问题。 已解决！ //问题点2：拉伸不精确问题。 已解决！ //待解决技术1：背景变色 已解决！ public partial class JT : Form { public JT() { templocation = new Point(0, 0); tempsize = new Size(0, 0); InitializeComponent(); } public Image img = null; public Graphics g; public Rectangle rect;//初始框信息 public Pen pen = new Pen(Brushes.Blue, 1); public Rectangle finalrect;//最终框信息 public int State = 0;//0无状态 1初次点击可以画框 2框以完成可以拖动和拉伸 3拖动状态 4拉伸状态 public int State2 = 0;//0不可拉伸不可拖动,1可拖动不可拉伸 2可拉伸不可拖动 public Point oldpo;//公用变量,主要是储存值 public enmuFX Fx = enmuFX.上边框;//默认值 Point templocation;//公用变量,主要是储存值 Size tempsize;//公用变量,主要是储存值 public Label labsize = null; public Size sizelab; private Brush rectBrush = null; private Color coverColor; private void Form2_Load(object sender, EventArgs e) { pic1.Image = img; pic1.Cursor = Cursors.Cross; coverColor = Color.FromArgb(65, 0, 0, 0); rectBrush = new SolidBrush(coverColor); } private void pictureBox1_MouseMove(object sender, MouseEventArgs e) { if (State == 1) { HT(e);//画框 } else if (State == 2) { JC(e);//检测拉伸和拖动状态 } else if (State == 3) { TD(e);//拖动 } else if (State == 4) { LS(e);//拉伸 ，并不执行拉伸任务，判断并交给 画框任务 } else if (State == 5) { makeheng(e);//左右拉伸 ，并不执行拉伸任务，判断并交给 左右拉伸任务 } else if (State == 6) { makezong(e);//上下拉伸 ，并不执行拉伸任务，判断并交给 上下拉伸任务 } } //画框 public void HT(MouseEventArgs e) { //pic1.Refresh(); //Label lab = pic1.Controls.Find("labsize", false).First() as Label; //阶段2代码 int width = 0; int height = 0; width = Math.Abs(e.X - oldpo.X); height = Math.Abs(e.Y - oldpo.Y); templocation.X = Math.Min(e.X, oldpo.X); templocation.Y = Math.Min(e.Y, oldpo.Y); tempsize.Width = width; tempsize.Height = height; rect.Size = tempsize; rect.Location = templocation; finalrect = rect; this.Invalidate(true); //pic1.Refresh();////////////////////////////////////////////////技术性问题（重绘导致速度变慢，不重绘导致label显示迟缓） 已解决！ #region 阶段1的冗余代码 //labsize.Text = "[" + width + "," + height + "]"; //阶段1代码 //if ((e.X - oldpo.X) >= 0 && (e.Y - oldpo.Y) >= 0) //{ // rect = new Rectangle(oldpo.X, oldpo.Y, (e.X - oldpo.X), (e.Y - oldpo.Y)); // rect.Location = new Point(oldpo.X, oldpo.Y); // rect.Size = new Size((e.X - oldpo.X), (e.Y - oldpo.Y)); // lab.Text = "[" + width + "," + height + "]"; //} //else if ((e.X - oldpo.X) < 0 && (e.Y - oldpo.Y) < 0) //{ // rect = new Rectangle((oldpo.X - (oldpo.X - e.X)), (oldpo.Y - (oldpo.Y - e.Y)), (oldpo.X - e.X), (oldpo.Y - e.Y)); // rect.Location = new Point((oldpo.X - (oldpo.X - e.X)), (oldpo.Y - (oldpo.Y - e.Y))); // rect.Size = new Size((oldpo.X - e.X), (oldpo.Y - e.Y)); // lab.Text = "[" + width + "," + height + "]"; //} //else if ((e.X - oldpo.X) >= 0 && (e.Y - oldpo.Y) < 0) //{ // rect = new Rectangle(oldpo.X, (oldpo.Y - (oldpo.Y - e.Y)), (e.X - oldpo.X), (oldpo.Y - e.Y)); // rect.Location = new Point(oldpo.X, (oldpo.Y - (oldpo.Y - e.Y))); // rect.Size = new Size((e.X - oldpo.X), (oldpo.Y - e.Y)); // lab.Text = "[" + width + "," + height + "]"; //} //else //{ // rect = new Rectangle((oldpo.X - (oldpo.X - e.X)), oldpo.Y, (oldpo.X - e.X), (e.Y - oldpo.Y)); // rect.Location = new Point((oldpo.X - (oldpo.X - e.X)), oldpo.Y); // rect.Size = new Size((oldpo.X - e.X), (e.Y - oldpo.Y)); // lab.Text = "[" + width + "," + height + "]"; //} #endregion } //检测拉伸和拖动状态 public void JC(MouseEventArgs e) { if (e.X < finalrect.X + 3 && e.X > finalrect.X - 3 && e.Y < finalrect.Y + 3 && e.Y > finalrect.Y - 3) { pic1.Cursor = Cursors.SizeNWSE; State2 = 2; Fx = enmuFX.左上角; } else if (e.X < (finalrect.X + finalrect.Width + 3) && e.X > (finalrect.X + finalrect.Width - 3) && e.Y < finalrect.Y + 3 && e.Y > finalrect.Y - 3) { pic1.Cursor = Cursors.SizeNESW; State2 = 2; Fx = enmuFX.右上角; } else if (e.X < finalrect.X && e.X > finalrect.X - 3 && e.Y < (finalrect.Y + finalrect.Height + 3) && e.Y > (finalrect.Y + finalrect.Height - 3)) { pic1.Cursor = Cursors.SizeNESW; State2 = 2; Fx = enmuFX.左下角; } else if (e.X < (finalrect.X + finalrect.Width + 3) && e.X > (finalrect.X + finalrect.Width - 3) && e.Y < (finalrect.Y + finalrect.Height + 3) && e.Y > (finalrect.Y + finalrect.Height - 3)) { pic1.Cursor = Cursors.SizeNWSE; State2 = 2; Fx = enmuFX.右下角; } else if (e.X < finalrect.X + 3 && e.X > finalrect.X - 3 && e.Y > finalrect.Y && e.Y < (finalrect.Y + finalrect.Height)) { pic1.Cursor = Cursors.SizeWE; State2 = 2; Fx = enmuFX.左边框; } else if (e.X < (finalrect.X + 3 + finalrect.Width) && e.X > (finalrect.X - 3 + finalrect.Width) && e.Y > finalrect.Y && e.Y < (finalrect.Y + finalrect.Height)) { pic1.Cursor = Cursors.SizeWE; State2 = 2; Fx = enmuFX.右边框; } else if (e.Y < (finalrect.Y + 3) && e.Y > (finalrect.Y - 3) && e.X > finalrect.X && e.X < (finalrect.X + finalrect.Width)) { pic1.Cursor = Cursors.SizeNS; State2 = 2; Fx = enmuFX.上边框; } else if (e.Y < (finalrect.Y + 3 + finalrect.Height) && e.Y > (finalrect.Y - 3 + finalrect.Height) && e.X > finalrect.X && e.X < (finalrect.X + finalrect.Width)) { pic1.Cursor = Cursors.SizeNS; State2 = 2; Fx = enmuFX.下边框; } else if (finalrect.Contains(new Point(e.X, e.Y))) { pic1.Cursor = Cursors.SizeAll; State2 = 1; } else { pic1.Cursor = Cursors.Default; State2 = 0; } } //拖动 public void TD(MouseEventArgs e) { templocation.X = rect.X + (e.X - oldpo.X); templocation.Y = rect.Y + (e.Y - oldpo.Y); finalrect.Location = templocation; this.Invalidate(true); } //拉伸 public void LS(MouseEventArgs e) { if (Fx == enmuFX.左上角) { oldpo.X = rect.X + rect.Width; oldpo.Y = rect.Y + rect.Height; State = 1; } else if (Fx == enmuFX.右上角) { oldpo.X = rect.X; oldpo.Y = rect.Y + rect.Height; State = 1; } else if (Fx == enmuFX.右下角) { oldpo.X = rect.X; oldpo.Y = rect.Y; State = 1; } else if (Fx == enmuFX.左下角) { oldpo.X = rect.X + rect.Width; oldpo.Y = rect.Y; State = 1; } else if (Fx == enmuFX.左边框) { oldpo.X = rect.X + rect.Width; State = 5; } else if (Fx == enmuFX.右边框) { oldpo.X = rect.X; State = 5; } else if (Fx == enmuFX.上边框) { oldpo.Y = rect.Y + rect.Height; State = 6; } else if (Fx == enmuFX.下边框) { oldpo.Y = rect.Y; State = 6; } } /// <summary> /// 左右拉伸 /// </summary> /// <param name="e"></param> public void makeheng(MouseEventArgs e) { int width = 0; int height = 0; width = Math.Abs(e.X - oldpo.X); height = rect.Height; templocation.X = Math.Min(e.X, oldpo.X); templocation.Y = rect.Y; tempsize.Width = width; tempsize.Height = height; rect.Size = tempsize; rect.Location = templocation; finalrect = rect; this.Invalidate(true); } /// <summary> /// 上下拉伸 /// </summary> /// <param name="e"></param> public void makezong(MouseEventArgs e) { int width = 0; int height = 0; width = rect.Width; height = Math.Abs(e.Y - oldpo.Y); templocation.X = rect.X; templocation.Y = Math.Min(e.Y, oldpo.Y); tempsize.Width = width; tempsize.Height = height; rect.Size = tempsize; rect.Location = templocation; finalrect = rect; this.Invalidate(true); } private void pictureBox1_MouseUp(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { if (State == 1)//判断是否正在绘画 { State = 2;//绘画完成，框可以被拖动或者拉伸 pic1.Cursor = Cursors.Default;//设置鼠标为默认 } else if (State == 3)//判断是否正在被拖动 { State = 2;//拖动成功再次被标记成 绘画完成状态 rect = finalrect; } else if (State == 4)//判断是否正在被拉伸 { State = 2;//拉伸成功再次被标记成 绘画完成状态 rect = finalrect; } else if (State == 5)//判断是否正在被左右拉伸 { State = 2;//拉伸成功再次被标记成 绘画完成状态 rect = finalrect; } else if (State == 6)//判断是否正在被上下拉伸 { State = 2;//拉伸成功再次被标记成 绘画完成状态 rect = finalrect; } } } private void pictureBox1_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { if (State == 0)//判断是否为初始状态 { State = 1; oldpo = new Point(e.X, e.Y); rect = new Rectangle(e.X, e.Y, 0, 0); finalrect = rect; this.Invalidate(true); templocation = e.Location; } else if (State == 2)//判断是都已经绘画完成并可以拖动和拉伸 { switch (State2) { case 1: State = 3; oldpo = new Point(e.X, e.Y); break; case 2: State = 4; oldpo = new Point(e.X, e.Y); break; } } } else if(e.Button == MouseButtons.Right) { State = 0; finalrect = new Rectangle(); tempsize = new Size(); templocation = new Point(); this.Invalidate(true); pic1.Cursor = Cursors.Default; } } private ImageCodecInfo GetEncoderInfo(String mimeType) { int j; ImageCodecInfo[] encoders; encoders = ImageCodecInfo.GetImageEncoders(); for (j = 0; j < encoders.Length; ++j) { if (encoders[j].MimeType == mimeType) return encoders[j]; } return null; } private void Form2_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Escape) { this.Close(); } else if (State == 2) { if (e.KeyCode == Keys.Left) { make2(e.Control, -10, -1); templocation.X = finalrect.X; } else if (e.KeyCode == Keys.Right) { make2(e.Control, 10, 1); templocation.X = finalrect.X; } else if (e.KeyCode == Keys.Up) { make1(e.Control, -10, -1); templocation.Y = finalrect.Y; } else if (e.KeyCode == Keys.Down) { make1(e.Control, 10, 1); templocation.Y = finalrect.Y; } rect = finalrect; this.Invalidate(true); } } public void make1(bool isdo, int num1, int num2) { if (isdo) { finalrect.Y += num1; } else { finalrect.Y += num2; } } public void make2(bool isdo, int num1, int num2) { if (isdo) { finalrect.X += num1; } else { finalrect.X += num2; } } Font f = new Font("宋体", 12); private void pic1_Paint(object sender, PaintEventArgs e) { g = e.Graphics; using (GraphicsPath path = new GraphicsPath()) { path.AddRectangle(this.Bounds); path.AddRectangle(finalrect); g.FillPath(rectBrush, path); g.DrawRectangle(pen, finalrect); } g.DrawString(("[" + tempsize.Width + "," + tempsize.Height + "]"), f, Brushes.Blue, templocation.X - 70, templocation.Y - 20); } private void pic1_MouseDoubleClick(object sender, MouseEventArgs e) { if (State != 0 && e.Button == MouseButtons.Left) { Bitmap bit = new Bitmap(finalrect.Width, finalrect.Height); //建立做图纸 g = Graphics.FromImage(bit); //绘图 g.DrawImage(img, new Rectangle(0, 0, finalrect.Width, finalrect.Height), finalrect, GraphicsUnit.Pixel); if (temp.WaterStr.Trim().Length > 0) { Image imgwater = Image.FromFile(temp.WaterStr); int x = 0; int y = 0; if (temp.Posi == Position.居中) { x = finalrect.Width / 2 - imgwater.Width / 2; y = finalrect.Height / 2 - imgwater.Height / 2; } else if (temp.Posi == Position.右上角) { x = finalrect.Width - imgwater.Width; y = 0; } else if (temp.Posi == Position.右下角) { x = finalrect.Width - imgwater.Width; y = finalrect.Height - imgwater.Height; } else if (temp.Posi == Position.左上角) { x = 0; y = 0; } else if (temp.Posi == Position.左下角) { x = 0; y = finalrect.Height - imgwater.Height; } g.DrawImage(imgwater, x, y, imgwater.Width, imgwater.Height); } //Image img2 = Image.FromFile(Application.StartupPath + "//logo.jpg"); //g.DrawImage(img2, 0, 0); //做图质量 消除锯齿 g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality; g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias; Clipboard.SetImage(bit); //保存图片 // bit.Save((DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg"), myimagecodeinfo, myEncoderParameters); g.Dispose(); bit.Dispose(); pic1.Refresh(); this.Close(); } } }}

自定义控件 提高绘图速度

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace CJT{ public partial class pic : PictureBox { public pic() { InitializeComponent(); this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true); this.SetStyle(ControlStyles.AllPaintingInWmPaint, true); this.SetStyle(ControlStyles.ResizeRedraw, true); } protected override void OnPaint(PaintEventArgs pe) { base.OnPaint(pe); } }}

 

应用技术：Graphics绘图，自定义控件 想想也没什么技术。。。哎

源码下载地址：http://download.csdn.net/source/2856357