随着电子屏幕技术的发展，普通的黑板已不再适用现在的教学和演示环境，电子白板应运而生。本篇使用WPF开发了一个电子白板工具，功能丰富，非常使用日常免费使用，或者进行再次开发。

示例代码如下：

        Stack<StrokeCollection> undoStack = new Stack<StrokeCollection>();//撤销Stack<StrokeCollection> recoverStack = new Stack<StrokeCollection>();//恢复撤销public MainWindow(){InitializeComponent();this.DataContext = Global.Instance.WhiteBoardPageModel;try{EraserCanvas.MouseDown += EraserCanvas_MouseDown;EraserCanvas.MouseMove += EraserCanvas_MouseMove;EraserCanvas.MouseUp += EraserCanvas_MouseUp;Global.Instance.InkCanvasList[ Global.Instance.WhiteBoardPageModel.PageIndex-1].PreviewMouseDown += WriteBorad_PreviewMouseDown;InkCanvasRootPanel.Children.Clear();InkCanvasRootPanel.Children.Add(Global.Instance.InkCanvasList[Global.Instance.WhiteBoardPageModel.PageIndex - 1]);}catch (Exception){}}private void Window_Loaded(object sender, RoutedEventArgs e){//top = this.Top;//left = this.Left;//width = this.Width;//heigh = this.Height;//启动最大化白板this.Top = this.Left = 0;this.Width = SystemParameters.WorkArea.Width;this.Height = SystemParameters.WorkArea.Height;//设置色板和清空橡皮位置Window window = Window.GetWindow(rdoPen);Point point = rdoPen.TransformToAncestor(window).Transform(new Point(0, 0));translateColor.X = translateColor.X - 100;translateEraser.X = translateEraser.X-30;if (rdoPenWidthMin.Content.ToString() == Global.Instance.ColorHelper.selectedPenWidth.Trim())rdoPenWidthMin.IsChecked = true;else if (rdoPenWidthMedium.Content.ToString() == Global.Instance.ColorHelper.selectedPenWidth.Trim())rdoPenWidthMedium.IsChecked = true;else if (rdoPenWidthMax.Content.ToString() == Global.Instance.ColorHelper.selectedPenWidth.Trim())rdoPenWidthMax.IsChecked = true;//初始化色板foreach (string color in Global.Instance.ColorHelper.colorList){RadioButton btntemp = new RadioButton();btntemp.SetResourceReference(StyleProperty, "ColorSelectStyle");btntemp.Width = 30;btntemp.Height = 30;btntemp.Margin = new Thickness(2, 2, 2, 0);btntemp.Background = new SolidColorBrush((System.Windows.Media.Color)ColorConverter.ConvertFromString(color));if (btntemp.Background.ToString() == Global.Instance.ColorHelper.selectedColor){btntemp.IsChecked = true;Global.Instance.InkCanvasList[ Global.Instance.WhiteBoardPageModel.PageIndex-1].DefaultDrawingAttributes.Color =(System.Windows.Media.Color)ColorConverter.ConvertFromString((string)Global.Instance.ColorHelper.selectedColor);}                    uniformColor.Children.Add(btntemp);}}#region InkCanvas操作bool transformColorFlag = false;bool transformEraserClearFlag = false;private void RadioButton_Click(object sender, RoutedEventArgs e){//橡皮模式下选择其他工具关闭橡皮擦功能EraserCanvas.Visibility = Visibility.Collapsed;_eraserisDown = false;//如果色板打开下选择其他工具,隐藏色板工具if (!(bool)rdoPen.IsChecked){transformColorFlag = false;translateColor.Y = 300;}if (!(bool)rdoEraser.IsChecked){transformEraserClearFlag = false;translateEraser.Y = 100;}if ((sender as RadioButton).Content.ToString() == "画笔"){if (transformColorFlag){translateColor.Y = -10;}else{translateColor.Y = 300;}transformColorFlag = !transformColorFlag;Global.Instance.InkCanvasList[Global.Instance.WhiteBoardPageModel.PageIndex - 1].EditingMode = InkCanvasEditingMode.Ink;}else if ((sender as RadioButton).Content.ToString() == "橡皮"){if (transformEraserClearFlag){translateEraser.Y = -10;}else{translateEraser.Y = 100;}transformEraserClearFlag = !transformEraserClearFlag;Global.Instance.InkCanvasList[Global.Instance.WhiteBoardPageModel.PageIndex - 1].EditingMode = InkCanvasEditingMode.None;EraserCanvas.Visibility = Visibility.Visible;TranslateTransform.X = -1000;TranslateTransform.Y = -1000;//Global.Instance.InkCanvasList[ Global.Instance.WhiteBoardPageModel.PageIndex-1].EditingMode = InkCanvasEditingMode.EraseByPoint;//Global.Instance.InkCanvasList[ Global.Instance.WhiteBoardPageModel.PageIndex-1].EditingMode = InkCanvasEditingMode.EraseByStroke;}else if ((sender as RadioButton).Content.ToString() == "选择"){//PenFullScreen();Global.Instance.InkCanvasList[Global.Instance.WhiteBoardPageModel.PageIndex - 1].EditingMode = InkCanvasEditingMode.None;//Global.Instance.InkCanvasList[ Global.Instance.WhiteBoardPageModel.PageIndex-1].EditingMode = InkCanvasEditingMode.Select;}else if ((sender as RadioButton).Content.ToString() == "撤销"){if (undoStack.Count > 0){recoverStack.Push(Global.Instance.InkCanvasList[Global.Instance.WhiteBoardPageModel.PageIndex - 1].Strokes.Clone());Global.Instance.InkCanvasList[Global.Instance.WhiteBoardPageModel.PageIndex - 1].Strokes = undoStack.Pop();}}else if ((sender as RadioButton).Content.ToString() == "恢复"){if (recoverStack.Count > 0){undoStack.Push(Global.Instance.InkCanvasList[Global.Instance.WhiteBoardPageModel.PageIndex - 1].Strokes.Clone());Global.Instance.InkCanvasList[Global.Instance.WhiteBoardPageModel.PageIndex - 1].Strokes = recoverStack.Pop();}}}#endregion

实例链接：https://download.csdn.net/download/lvxingzhe3/89505111