ActiveX网页截图插件
该插件目前只提供截图功能，你可以继续优化截图的编辑功能。
该插件使用js调用OpenScreen方法后启动截图功能，在截图功能启动后按键盘C键抓取屏幕，然后选中截取部分后双击选取将会完成截图，鼠标的右键为取消选中区域和取消已抓取的的屏幕。双击桌面右下角的文字可以关闭截图功能。
/// <summary> /// 截图核心 /// </summary> [Description("截图核心")] public class ScreenCore { #region /// <summary> /// 截图ActiveX /// </summary> public ActiveXScreen activeXScreen = null; /// <summary> /// 关闭窗体 /// </summary> internal IcoForm icoForm = null; /// <summary> /// 截屏窗体 /// </summary> internal ScreenForm screenForm = null; /// <summary> /// 截图状态 /// </summary> public CaptureStatus captureStatus = CaptureStatus.Close; /// <summary> /// 键盘钩 /// </summary> public HookUilt HookObject = null; /// <summary> /// 要截取的屏幕 /// </summary> public Screen screen = null; /// <summary> /// 原始截图 /// </summary> public Bitmap OriginalScreen = null; /// <summary> /// 蒙版截图 /// </summary> public Bitmap MaskScreen = null; /// <summary> /// 截图边框厚度 /// </summary> public int CatBoder = 1; /// <summary> /// 截图边框颜色 /// </summary> public Color CatBodeColor = Color.YellowGreen; /// <summary> /// 截图边框点的外边距 /// </summary> public int CatBoderDotMargin = 3; /// <summary> /// 截图边框Rect /// </summary> public ImageRectangle CatRect = null; /// <summary> /// 鼠标的类型 /// </summary> public ScreenMoveTypes ScreenMoveType = ScreenMoveTypes.Normal; /// <summary> /// 鼠标按下的坐标 /// </summary> public Point MoveDownPoint; /// <summary> /// 鼠标移动时的上一次坐标 /// </summary> public Point MoveStartPoint; #endregion public ScreenCore(ActiveXScreen _activeXScreen) { this.activeXScreen = _activeXScreen; this.icoForm = new IcoForm(this); this.screenForm = new ScreenForm(this); this.HookObject = new HookUilt(); this.HookObject.KeyDownHandler += new KeyEventHandler(this.Screen_KeyDown); } /// <summary> /// 键盘监听 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Screen_KeyDown(object sender, KeyEventArgs e) { switch (e.KeyCode) { case Keys.C://截图 { if (this.captureStatus == CaptureStatus.Open) { this.CaptureScreen(); } break; } case Keys.Up://上移 { if (this.captureStatus == CaptureStatus.Capture && this.IsCapture()) { this.CatRect.Rect = new Rectangle(this.GetRectanglePoint(this.CatRect.Rect.X, this.CatRect.Rect.Y - 1), this.CatRect.Rect.Size); this.InitializeRectangleDot(); this.screenForm.Invalidate(); } break; } case Keys.Down://下移 { if (this.captureStatus == CaptureStatus.Capture && this.IsCapture()) { this.CatRect.Rect = new Rectangle(this.GetRectanglePoint(this.CatRect.Rect.X, this.CatRect.Rect.Y + 1), this.CatRect.Rect.Size); this.InitializeRectangleDot(); this.screenForm.Invalidate(); } break; } case Keys.Left://左移 { if (this.captureStatus == CaptureStatus.Capture && this.IsCapture()) { this.CatRect.Rect = new Rectangle(this.GetRectanglePoint(this.CatRect.Rect.X - 1, this.CatRect.Rect.Y), this.CatRect.Rect.Size); this.InitializeRectangleDot(); this.screenForm.Invalidate(); } break; } case Keys.Right://右移 { if (this.captureStatus == CaptureStatus.Capture && this.IsCapture()) { this.CatRect.Rect = new Rectangle(this.GetRectanglePoint(this.CatRect.Rect.X + 1, this.CatRect.Rect.Y), this.CatRect.Rect.Size); this.InitializeRectangleDot(); this.screenForm.Invalidate(); } break; } } } /// <summary> /// 初始化截图边框信息 /// </summary> /// <param name="moveStartPoint">截图边框开始坐标</param> /// <param name="moveEndPoint">截图边框结束坐标</param> public void InitializeRectangle(Point moveStartPoint, Point moveEndPoint) { Point point = new Point(Math.Min(moveStartPoint.X, moveEndPoint.X), Math.Min(moveStartPoint.Y, moveEndPoint.Y)); Size size = new Size(Math.Abs(moveStartPoint.X - moveEndPoint.X), Math.Abs(moveStartPoint.Y - moveEndPoint.Y)); this.CatRect.Rect = new Rectangle(point, size); } /// <summary> /// 初始化截图边框点信息 /// </summary> public void InitializeRectangleDot() { int dot_width = this.CatBoderDotMargin * 2; this.CatRect.TopLeftRect = new Rectangle(this.CatRect.Rect.X - this.CatBoderDotMargin, this.CatRect.Rect.Y - this.CatBoderDotMargin, dot_width, dot_width); this.CatRect.TopMiddleRect = new Rectangle(this.CatRect.Rect.X + this.CatRect.Rect.Width / 2 - this.CatBoderDotMargin, this.CatRect.Rect.Y - this.CatBoderDotMargin, dot_width, dot_width); this.CatRect.TopRightRect = new Rectangle(this.CatRect.Rect.Right - this.CatBoderDotMargin, this.CatRect.Rect.Y - this.CatBoderDotMargin, dot_width, dot_width); this.CatRect.BottomLeftRect = new Rectangle(this.CatRect.Rect.X - this.CatBoderDotMargin, this.CatRect.Rect.Bottom - this.CatBoderDotMargin, dot_width, dot_width); this.CatRect.BottomMiddleRect = new Rectangle(this.CatRect.Rect.X + this.CatRect.Rect.Width / 2 - this.CatBoderDotMargin, this.CatRect.Rect.Bottom - this.CatBoderDotMargin, dot_width, dot_width); this.CatRect.BottomRightRect = new Rectangle(this.CatRect.Rect.Right - this.CatBoderDotMargin, this.CatRect.Rect.Bottom - this.CatBoderDotMargin, dot_width, dot_width); this.CatRect.MiddleLeftRect = new Rectangle(this.CatRect.Rect.X - this.CatBoderDotMargin, this.CatRect.Rect.Y + this.CatRect.Rect.Height / 2 - this.CatBoderDotMargin, dot_width, dot_width); this.CatRect.MiddleRightRect = new Rectangle(this.CatRect.Rect.Right - this.CatBoderDotMargin, this.CatRect.Rect.Y + this.CatRect.Rect.Height / 2 - this.CatBoderDotMargin, dot_width, dot_width); } /// <summary> /// 缩放截图边框 /// </summary> /// <param name="moveStartPoint">缩放前鼠标坐标</param> /// <param name="moveEndPoint">缩放后鼠标坐标</param> public void ZoonRectangle(Point moveStartPoint, Point moveEndPoint) { int x = moveEndPoint.X - moveStartPoint.X; int y = moveEndPoint.Y - moveStartPoint.Y; #region 更新鼠标类型 if (this.ScreenMoveType == ScreenMoveTypes.DownZoonTopLeft) { this.CatRect.Rect = new Rectangle(this.CatRect.Rect.X + x, this.CatRect.Rect.Y + y, this.CatRect.Rect.Width - x, this.CatRect.Rect.Height - y); if (this.CatRect.Rect.Width < 0 && this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonBottomRight; } else if (this.CatRect.Rect.Width < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonTopRight; } else if (this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonBottomLeft; } } else if (this.ScreenMoveType == ScreenMoveTypes.DownZoonTopMiddle) { this.CatRect.Rect = new Rectangle(this.CatRect.Rect.X, this.CatRect.Rect.Y + y, this.CatRect.Rect.Width, this.CatRect.Rect.Height - y); if (this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonBottomMiddle; } } else if (this.ScreenMoveType == ScreenMoveTypes.DownZoonTopRight) { this.CatRect.Rect = new Rectangle(this.CatRect.Rect.X, this.CatRect.Rect.Y + y, this.CatRect.Rect.Width + x, this.CatRect.Rect.Height - y); if (this.CatRect.Rect.Width < 0 && this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonBottomLeft; } else if (this.CatRect.Rect.Width < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonTopLeft; } else if (this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonBottomRight; } } else if (this.ScreenMoveType == ScreenMoveTypes.DownZoonBottomLeft) { this.CatRect.Rect = new Rectangle(this.CatRect.Rect.X + x, this.CatRect.Rect.Y, this.CatRect.Rect.Width - x, this.CatRect.Rect.Height + y); if (this.CatRect.Rect.Width < 0 && this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonTopRight; } else if (this.CatRect.Rect.Width < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonBottomRight; } else if (this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonTopLeft; } } else if (this.ScreenMoveType == ScreenMoveTypes.DownZoonBottomMiddle) { this.CatRect.Rect = new Rectangle(this.CatRect.Rect.X, this.CatRect.Rect.Y, this.CatRect.Rect.Width, this.CatRect.Rect.Height + y); if (this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonTopMiddle; } } else if (this.ScreenMoveType == ScreenMoveTypes.DownZoonBottomRight) { this.CatRect.Rect = new Rectangle(this.CatRect.Rect.X, this.CatRect.Rect.Y, this.CatRect.Rect.Width + x, this.CatRect.Rect.Height + y); if (this.CatRect.Rect.Width < 0 && this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonTopLeft; } else if (this.CatRect.Rect.Width < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonBottomLeft; } else if (this.CatRect.Rect.Height < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonTopRight; } } else if (this.ScreenMoveType == ScreenMoveTypes.DownZoonMiddleLeft) { this.CatRect.Rect = new Rectangle(this.CatRect.Rect.X + x, this.CatRect.Rect.Y, this.CatRect.Rect.Width - x, this.CatRect.Rect.Height); if (this.CatRect.Rect.Width < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonMiddleRight; } } else if (this.ScreenMoveType == ScreenMoveTypes.DownZoonMiddleRight) { this.CatRect.Rect = new Rectangle(this.CatRect.Rect.X, this.CatRect.Rect.Y, this.CatRect.Rect.Width + x, this.CatRect.Rect.Height); if (this.CatRect.Rect.Width < 0) { this.ScreenMoveType = ScreenMoveTypes.DownZoonMiddleLeft; } } #endregion #region 更新截图边框防止匡高出现负数 int x_tmp = this.CatRect.Rect.X; int y_tmp = this.CatRect.Rect.Y; int width_tmp = this.CatRect.Rect.Width; int height_tmp = this.CatRect.Rect.Height; if (this.CatRect.Rect.Width < 0) { width_tmp = -1 * this.CatRect.Rect.Width; x_tmp = this.CatRect.Rect.X - width_tmp; } if (this.CatRect.Rect.Height < 0) { height_tmp = -1 * this.CatRect.Rect.Height; y_tmp = this.CatRect.Rect.Y - height_tmp; } this.CatRect.Rect = new Rectangle(x_tmp, y_tmp, width_tmp, height_tmp); #endregion } /// <summary> /// 获取截图边框在屏幕的允许坐标中 /// </summary> /// <param name="x"></param> /// <param name="y"></param> /// <returns></returns> public Point GetRectanglePoint(int x, int y) { if (x < this.screen.Bounds.X) x = this.screen.Bounds.X; if (x > this.screen.Bounds.Right - this.CatRect.Rect.Width) x = this.screen.Bounds.Right - this.CatRect.Rect.Width; if (y < this.screen.Bounds.Y) y = this.screen.Bounds.Y; if (y > this.screen.Bounds.Bottom - this.CatRect.Rect.Height) y = this.screen.Bounds.Bottom - this.CatRect.Rect.Height; return new Point(x, y); } /// <summary> /// 打开截屏 /// </summary> public void OpenScreen() { this.captureStatus = CaptureStatus.Open; this.icoForm.Show(); this.screenForm.Hide(); this.icoForm.LoadLocation(); this.HookObject.Hook_Start(); } /// <summary> /// 关闭截屏 /// </summary> public void ColseScreen() { this.CatRect = null; this.DisposeImage(true, true); this.HookObject.Hook_Clear(); this.icoForm.Hide(); this.screenForm.Hide(); this.captureStatus = CaptureStatus.Close; } /// <summary> /// 截屏 /// </summary> private void CaptureScreen() { this.icoForm.Hide(); this.screenForm.Hide(); this.screen = Screen.FromControl(this.screenForm); this.screenForm.BackgroundImage = null; this.DisposeImage(true, true); //原图 this.OriginalScreen = new Bitmap(this.screen.Bounds.Width, this.screen.Bounds.Height); Graphics g = Graphics.FromImage(this.OriginalScreen); g.CopyFromScreen(new Point(0, 0), new Point(0, 0), this.screen.Bounds.Size); //蒙版图 this.MaskScreen = (Bitmap)this.OriginalScreen.Clone(); g = Graphics.FromImage(this.MaskScreen); SolidBrush mask_sb = new SolidBrush(Color.FromArgb(150, 1, 1, 1)); g.FillRectangle(mask_sb, this.screen.Bounds); mask_sb.Dispose(); g.Dispose(); this.screenForm.BackgroundImage = (Image)this.MaskScreen; this.screenForm.Location = this.screen.Bounds.Location; this.screenForm.Size = this.screen.Bounds.Size; this.screenForm.Show(); this.captureStatus = CaptureStatus.Capture; } /// <summary> /// 释放截取的图片 /// </summary> /// <param name="Original">是否释放原图</param> /// <param name="Mask">是否释放蒙版图</param> public void DisposeImage(bool Original, bool Mask) { if (Original && this.OriginalScreen != null) { this.OriginalScreen.Dispose(); this.OriginalScreen = null; } if (Mask && this.MaskScreen != null) { this.MaskScreen.Dispose(); this.MaskScreen = null; } } /// <summary> /// 获取截取的图片 /// </summary> /// <returns></returns> public Bitmap GetCaptureImage() { Bitmap captureImage = new Bitmap(this.CatRect.Rect.Width, this.CatRect.Rect.Height);//选中截图 using (Graphics g = Graphics.FromImage(captureImage)) { g.DrawImage(this.OriginalScreen, 0, 0, this.CatRect.Rect, GraphicsUnit.Pixel); return captureImage; } } /// <summary> /// 获取截取的图片64为字符串 /// </summary> /// <param name="bmp">截取的图片</param> /// <returns></returns> public string GetCaptureImageBase64String(Bitmap bmp) { string captureImageBase64 = "data:image/jpeg;base64,"; using (MemoryStream ms = new MemoryStream()) { bmp.Save(ms, ImageFormat.Jpeg); captureImageBase64 += Convert.ToBase64String(ms.ToArray()); } return captureImageBase64; } /// <summary> /// 是否有截图边框 /// </summary> /// <returnsshifou></returns> public bool IsCapture() { if (this.CatRect == null || this.CatRect.Rect.Width < 1 || this.CatRect.Rect.Height < 1) { return false; } return true; } }
源码下载地址：ActiveX网页截图插件.zip
