winform实现QQ截图代码

using System; using System.Drawing; using System.Collections; using https://www.sodocs.net/doc/f82754714.html,ponentModel; using System.Windows.Forms; using System.Data; using System.Runtime.InteropServices; namespace CaptureScreen { ///

/// CaptureScreenForm 的摘要说明。 ///

public class CaptureScreenForm : System.Windows.Forms.Form { private System.Windows.Forms.PictureBox picbox; private System.Windows.Forms.Button exitBtn; private System.Windows.Forms.Button aboutBtn; private System.Windows.Forms.Button ClearBtn; private System.Windows.Forms.Button saveBtn; private System.Windows.Forms.Button fullScreenBtn; private System.Windows.Forms.Button mouseCaptureBtn; public static Image image = null ; private System.Windows.Forms.Panel panel1; ///

/// 必需的设计器变量。 ///

private https://www.sodocs.net/doc/f82754714.html,ponentModel.Container components = null; public CaptureScreenForm() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } ///

/// 清理所有正在使用的资源。 ///

protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows 窗体设计器生成的代码 ///

/// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 ///

private void InitializeComponent() { this.picbox = new System.Windows.Forms.PictureBox(); this.fullScreenBtn = new System.Windows.Forms.Button(); this.mouseCaptureBtn = new System.Windows.Forms.Button(); this.ClearBtn = new System.Windows.Forms.Button(); this.saveBtn = new System.Windows.Forms.Button(); this.aboutBtn = new System.Windows.Forms.Button(); this.exitBtn = new System.Windows.Forms.Button(); this.panel1 = new System.Windows.Forms.Panel(); this.panel1.SuspendLayout(); this.SuspendLayout(); // // picbox // this.picbox.Location = new System.Drawing.Point(0, 40); https://www.sodocs.net/doc/f82754714.html, = "picbox"; this.picbox.Size = new System.Drawing.Size(680, 312); this.picbox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize; this.picbox.TabIndex = 0; this.picbox.TabStop = false; // // fullScreenBtn // this.fullScreenBtn.Location = new System.Drawing.Point(0, 0); https://www.sodocs.net/doc/f82754714.html, = "fullScreenBtn"; this.fullScreenBtn.Size = new System.Drawing.Size(96, 32); this.fullScreenBtn.TabIndex = 1; this.fullScreenBtn.Text = "全屏截取"; this.fullScreenBtn.Click += new System.EventHandler(this.fullScreenBtn_Click); // // mouseCaptureBtn // this.mouseCaptureBtn.Location = new System.Drawing.Point(120, 0); this.mouseCaptureBtn.

Name = "mouseCaptureBtn"; this.mouseCaptureBtn.Size = new System.Drawing.Size(96, 32); this.mouseCaptureBtn.TabIndex = 2; this.mouseCaptureBtn.Text = "鼠标截取"; this.mouseCaptureBtn.Click += new System.EventHandler(this.mouseCaptureBtn_Click); // // ClearBtn // this.ClearBtn.Location = new System.Drawing.Point(240, 0); https://www.sodocs.net/doc/f82754714.html, = "ClearBtn"; this.ClearBtn.Size = new System.Drawing.Size(88, 32); this.ClearBtn.TabIndex = 3; this.ClearBtn.Text = "清除截取图片"; this.ClearBtn.Click += new System.EventHandler(this.ClearBtn_Click); // // saveBtn // this.saveBtn.Location = new System.Drawing.Point(352, 0); https://www.sodocs.net/doc/f82754714.html, = "saveBtn"; this.saveBtn.Size = new System.Drawing.Size(96, 32); this.saveBtn.TabIndex = 4; this.saveBtn.Text = "保存截取图片"; this.saveBtn.Click += new System.EventHandler(this.saveBtn_Click); // // aboutBtn // this.aboutBtn.Location = new System.Drawing.Point(472, 0); https://www.sodocs.net/doc/f82754714.html, = "aboutBtn"; this.aboutBtn.Size = new System.Drawing.Size(96, 32); this.aboutBtn.TabIndex = 5; this.aboutBtn.Text = "关 于"; this.aboutBtn.Click += new System.EventHandler(this.aboutBtn_Click); // // exitBtn // this.exitBtn.Location = new System.Drawing.Point(592, 0); https://www.sodocs.net/doc/f82754714.html, = "exitBtn"; this.exitBtn.Size = new System.Drawing.Size(88, 32); this.exitBtn.TabIndex = 6; this.exitBtn.Text = "退 出"; this.exitBtn.Click += new System.EventHandler(this.exitBtn_Click); // // panel1 // this.panel1.Controls.Add(this.fullScreenBtn); this.panel1.Controls.Add(this.mouseCaptureBtn); this.panel1.Controls.Add(this.ClearBtn); this.panel1.Controls.Add(this.saveBtn); this.panel1.Controls.Add(this.aboutBtn); this.panel1.Controls.Add(this.exitBtn); this.panel1.Location = new System.Drawing.Point(0, 0); https://www.sodocs.net/doc/f82754714.html, = "panel1"; this.panel1.Size = new System.Drawing.Size(680, 32); this.panel1.TabIndex = 7; // // CaptureScreenForm // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.AutoScroll = true; this.ClientSize = new System.Drawing.Size(696, 358); this.Controls.Add(this.panel1); this.Controls.Add(this.picbox); https://www.sodocs.net/doc/f82754714.html, = "CaptureScreenForm"; this.Text = "截取屏幕"; this.panel1.ResumeLayout(false); this.ResumeLayout(false); } #endregion ///

/// 应用程序的主入口点。 ///

[STAThread] static void Main() { Application.Run(new CaptureScreenForm()); } protected override void OnPaint(PaintEventArgs e) { base.OnPaint (e); if(image != null) { this.picbox.Image = image; } else { this.picbox.Image = null; this.picbox.Refresh(); } } // 引用API [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]

public static extern bool BitBlt( IntPtr hdcDest, //目标设备的句柄 int nXDest, // 目标对象的左上角的X坐标 int nYDest, // 目标对象的左上角的X坐标 int nWidth, // 目标对象的矩形的宽度 int nHeight, // 目标对象的矩形的长度 IntPtr hdcSrc, // 源设备的句柄 int nXSrc, // 源对象的左上角的X坐标 int nYSrc, // 源对象的左上角的X坐标 System.Int32 dwRop // 光栅的操作值 ); private void exitBtn_Click(object sender, System.EventArgs e) { Application.Exit(); } private void aboutBtn_Click(object sender, System.EventArgs e) { MessageBox.Show("Code by Star in 2006-3-17,E_mail: ygh_01@https://www.sodocs.net/doc/f82754714.html, ,thank you to use this."); } private void ClearBtn_Click(object sender, System.EventArgs e) { CaptureScreenForm.image = null; this.Invalidate(); } private void saveBtn_Click(object sender, System.EventArgs e) { bool isSave = true; SaveFileDialog saveImageDialog = new SaveFileDialog(); saveImageDialog.Title = "Capture screen image save dialog"; saveImageDialog.Filter= @"jpeg|*.jpg|bmp|*.bmp|gif|*.gif"; if(saveImageDialog.ShowDialog() == DialogResult.OK) { string fileName = saveImageDialog.FileName.ToString(); if(fileName != "" && fileName != null) { string fileExtName = fileName.Substring(https://www.sodocs.net/doc/f82754714.html,stIndexOf(".")+1).ToString(); System.Drawing.Imaging.ImageFormat imgformat = null; if(fileExtName!="") { switch(fileExtName) { case "jpg": imgformat = System.Drawing.Imaging.ImageFormat.Jpeg; break; case "bmp": imgformat = System.Drawing.Imaging.ImageFormat.Bmp; break; case "gif": imgformat = System.Drawing.Imaging.ImageFormat.Gif; break; default: MessageBox.Show("只能存取为: jpg,bmp,gif 格式"); isSave = false; break; } } //默认保存为JPG格式 if(imgformat == null) { imgformat = System.Drawing.Imaging.ImageFormat.Jpeg; } if(isSave) { try { CaptureScreenForm.image.Save(fileName,imgformat); MessageBox.Show("图片已经成功保存!~~"); } catch { MessageBox.Show("保存失败,你还没有截取过图片或已经清空图片!"); } } } } } private void fullScreenBtn_Click(object sender, System.EventArgs e) { CaptureScreenForm.image = windowFullScreen(); picbox.Image = CaptureScreenForm.image; } public static Bitmap windowFullScreen() { //建立屏幕Graphics Graphics grpScreen = Graphics.FromHwnd(IntPtr.Zero); //根据屏幕大小建立位图 Bitmap bitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width,Screen.PrimaryScreen.Bounds.Height,grpScreen); //建立位图相

关Graphics Graphics grpBitmap = Graphics.FromImage(bitmap); //建立屏幕上下文 IntPtr hdcScreen = grpScreen.GetHdc(); //建立位图上下文 IntPtr hdcBitmap = grpBitmap.GetHdc(); //将屏幕捕获保存在图位中 BitBlt(hdcBitmap,0,0,bitmap.Width,bitmap.Height,hdcScreen,0,0,0x00CC0020); //关闭位图句柄 grpBitmap.ReleaseHdc(hdcBitmap); //关闭屏幕句柄 grpScreen.ReleaseHdc(hdcScreen); //释放位图对像 grpBitmap.Dispose(); //释放屏幕对像 grpScreen.Dispose(); //返回捕获位图 return bitmap; } private void mouseCaptureBtn_Click(object sender, System.EventArgs e) { MouseCaptureForm mouseCapture = new MouseCaptureForm(); mouseCapture.Show(); } } } 另一个截屏文件: MouseCaptureForm.cs using System; using System.Drawing; using System.Collections; using https://www.sodocs.net/doc/f82754714.html,ponentModel; using System.Windows.Forms; namespace CaptureScreen { ///

/// MouseCaptureForm 的摘要说明。 ///

public class MouseCaptureForm : System.Windows.Forms.Form { ///

/// 必需的设计器变量。 ///

// //自定义变量 // private Point pot; private Rectangle area = Rectangle.Empty; private Image img; private int index = -1; private string noselectString = "\n．请按下鼠标左键不放拖动选取截图区域\n\n ．单击鼠标右键或按ESC取消截图"; private string selectingString = "\n．松开鼠标左键确定选取范围\n\n．按ESC重新选择"; private string selectedString = "\n．按鼠标左键调整选择范围\n\n ．双击鼠标左键保存截图 \n\n．按鼠标右键重新选择 \n\n．ESC键取消截图"; private https://www.sodocs.net/doc/f82754714.html,bel tiptext; // //系统生成定义 // private https://www.sodocs.net/doc/f82754714.html,ponentModel.Container components = null; public MouseCaptureForm() { this.Bounds = System.Windows.Forms.Screen.PrimaryScreen.Bounds; this.BackgroundImage = CaptureScreenForm.windowFullScreen(); // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } ///

/// 清理所有正在使用的资源。 ///

protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows 窗体设计器生成的代码 ///

/// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 ///

private void InitializeComponent() { this.tiptext = new https://www.sodocs.net/doc/f82754714.html,bel(); this.SuspendLayout(); // // tiptext // this.tiptext.BackColor = System.Dr

awing.Color.FromArgb(((System.Byte)(192)), ((System.Byte)(192)), ((System.Byte)(255))); this.tiptext.ForeColor = System.Drawing.Color.White; this.tiptext.Location = new System.Drawing.Point(10, 10); https://www.sodocs.net/doc/f82754714.html, = "tiptext"; this.tiptext.Size = new System.Drawing.Size(166, 140); this.tiptext.TabIndex = 0; this.tiptext.MouseMove += new System.Windows.Forms.MouseEventHandler(this.tiptext_MouseMove); // // MouseCaptureForm // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(456, 320); this.Controls.Add(this.tiptext); this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None; https://www.sodocs.net/doc/f82754714.html, = "MouseCaptureForm"; this.ShowInTaskbar = false; this.StartPosition = System.Windows.Forms.FormStartPosition.WindowsDefaultBounds; this.Text = "鼠标截屏"; this.TopMost = true; this.WindowState = System.Windows.Forms.FormWindowState.Maximized; this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.MouseCaptureForm_KeyDown); this.Load += new System.EventHandler(this.MouseCaptureForm_Load); this.DoubleClick += new System.EventHandler(this.MouseCaptureForm_DoubleClick); this.ResumeLayout(false); } #endregion ///

/// 重载MouseDown ///

/// protected override void OnMouseDown(MouseEventArgs e) { base.OnMouseDown (e); { if(this.area == Rectangle.Empty && e.Button == MouseButtons.Left) { this.tiptext.Text = selectingString; this.area.Location = new Point(e.X,e.Y); } this.pot = new Point(e.X,e.Y); this.index = this.GetSelectedHandle(new Point(e.X,e.Y)); this.SetCursor(); } } ///

/// 设置鼠标方案 ///

private void SetCursor() { Cursor cr = Cursors.Default; if(index == 1 || index == 5) { cr = Cursors.SizeNWSE; } else if(index == 2 || index == 6) { cr = Cursors.SizeNS; } else if(index == 3 || index == 7) { cr = Cursors.SizeNESW; } else if(index == 4 || index == 8) { cr = Cursors.SizeWE; } else if(index == 0) { cr = Cursors.SizeAll; } Cursor.Current = cr; } protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); e.Graphics.DrawRectangle(new Pen(this.ForeColor),this.area); for(int i = 1;i < 9;i++) { e.Graphics.FillRectangle(new SolidBrush(Color.Green),this.GetHandleRect(i)); } } private Rectangle GetHandleRect(int index) { Point point = GetHandle(index); return new Rectangle(point.X - 3, point.Y - 3, 6, 6); } private Point GetHandle(int index) { int x, y, xCenter, yCenter; xCenter = area.X + area.Width/2; yCenter = area.Y + area.Height/2; x = area.X; y = area.Y; switch ( index ) { case 1: x

= area.X; y = area.Y; break; case 2: x = xCenter; y = area.Y; break; case 3: x = area.Right; y = area.Y; break; case 4: x = area.Right; y = yCenter; break; case 5: x = area.Right; y = area.Bottom; break; case 6: x = xCenter; y = area.Bottom; break; case 7: x = area.X; y = area.Bottom; break; case 8: x = area.X; y = yCenter; break; } return new Point(x, y); } protected override void OnMouseUp(MouseEventArgs e) { base.OnMouseUp (e); int left = area.Left; int top = area.Top; int right = area.Right; int bottom = area.Bottom; area.X = Math.Min(left,right); area.Y = Math.Min(top,bottom); area.Width = Math.Abs(left-right); area.Height = Math.Abs(top-bottom); this.tiptext.Text = selectedString; if(e.Button == MouseButtons.Right) { if(this.area == Rectangle.Empty) { this.Close(); } else { this.area=Rectangle.Empty; this.Invalidate(); } } this.index = this.GetSelectedHandle(new Point(e.X,e.Y)); this.SetCursor(); } private int GetSelectedHandle(Point p) { int index = -1; for(int i = 1;i < 9;i++) { if(GetHandleRect(i).Contains(p)) { index=i; break; } } if(this.area.Contains(p))index = 0; return index; } protected override void OnMouseMove(MouseEventArgs e) { base.OnMouseMove (e); if(this.Capture) { this.MoveHandleTo(new Point(e.X,e.Y)); this.Invalidate(); } else { this.index = this.GetSelectedHandle(new Point(e.X,e.Y)); this.SetCursor(); } } private void MoveHandleTo(Point point) { int left = area.Left; int top = area.Top; int right = area.Right; int bottom = area.Bottom; switch ( index ) { case 0: area.X +=point.X - this.pot.X; area.Y += point.Y - pot.Y; this.pot = point; return; case 1: left = point.X; top = point.Y; break; case 2: top = point.Y; break; case 3: right = point.X; top = point.Y; break; case 4: right = point.X; break; case 5: right = point.X; bottom = point.Y; break; case 6: bottom = point.Y; break; case 7: left = point.X; bottom = point.Y; break; case 8: left = point.X; break; } this.pot = point; area.X = left; area.Y = top; area.Width = right - left; area.Height = bottom - top; } private void MouseCaptureForm_DoubleClick(object sender, System.EventArgs e) { //修正截取图片过界提示内存不足BUG int left = area.Left; i

nt right = area.Right; int top = area.Top; int bottom = area.Bottom; if(left < Screen.PrimaryScreen.Bounds.Left) {left = Screen.PrimaryScreen.Bounds.Left; } if(right > Screen.PrimaryScreen.Bounds.Right ) {right = Screen.PrimaryScreen.Bounds.Right;} if(top < Screen.PrimaryScreen.Bounds.Top) {top = Screen.PrimaryScreen.Bounds.Top;} if(bottom > Screen.PrimaryScreen.Bounds.Bottom) {bottom = Screen.PrimaryScreen.Bounds.Bottom;} area.X = left; area.Y = top; area.Width = right - left; area.Height = bottom - top; //截取选择区域图片 Bitmap bm = new Bitmap(this.BackgroundImage); this.img = bm.Clone(this.area,System.Drawing.Imaging.PixelFormat.Format16bppArgb1555); CaptureScreenForm.image = img; CaptureScreenForm.ActiveForm.Invalidate(); this.Close(); } private void MouseCaptureForm_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) { if(e.KeyData == Keys.Escape && System.Windows.Forms.Button.MouseButtons == MouseButtons.Left) { this.area=Rectangle.Empty; this.Invalidate(); tiptext.Text = noselectString; } else if(e.KeyData == Keys.Escape) {this.Close();} } private void tiptext_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e) { if (tiptext.Location.X == 10 && tiptext.Location.Y == 10) { Point formloc = new Point((Screen.PrimaryScreen.Bounds.Width - 176),10) ; tiptext.Location = formloc; } else {tiptext.Location = new Point(10,10);} } private void MouseCaptureForm_Load(object sender, System.EventArgs e) { tiptext.Text = noselectString; } } } 以上是所有代码，功能简单，希望对大家有所帮助。