WPF InkCanvas基本操作方法详解

<Window x:Class="WPF_InkCanvas.MainWindow"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"    xmlns:local="clr-namespace:WPF_InkCanvas"    mc:Ignorable="d"  <Grid>    <Grid.RowDefinitions>      <RowDefinition/>      <RowDefinition Height="auto"/>      <RowDefinition Height="auto"/>    </Grid.RowDefinitions>    <Image Name="imgMeasure" HorizontalAlignment="Center" Stretch="Uniform"/>    <InkCanvas Name="inkCanvasMeasure" EditingMode="None" Background="Transparent" HorizontalAlignment="Center"           Width="{Binding ElementName=imgMeasure, Path=ActualWidth}" Height="{Binding ElementName=imgMeasure, Path=ActualHeight}"          >      <!--MouseDown="InkCanvasMeasure_MouseDown" MouseMove="InkCanvasMeasure_MouseMove"-->      <Label Content="{Binding MeaInfo}" Background="Transparent" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="10"           FontSize="18" Foreground="Red" IsHitTestVisible="False"/>    </InkCanvas>    <Grid Grid.Row="1">      <Grid.ColumnDefinitions>        <ColumnDefinition/>        <ColumnDefinition/>        <ColumnDefinition/>        <ColumnDefinition/>        <ColumnDefinition/>      </Grid.ColumnDefinitions>      <RadioButton Grid.Column="0" Content="绘制墨迹" Click="RadioButton_Click"/>      <RadioButton Grid.Column="1" Content="按点擦除" Click="RadioButton_Click"/>      <RadioButton Grid.Column="2" Content="按线擦除" Click="RadioButton_Click"/>      <RadioButton Grid.Column="3" Content="选中墨迹" Click="RadioButton_Click"/>      <RadioButton Grid.Column="4" Content="停止操作" Click="RadioButton_Click"/>    </Grid>    <StackPanel Grid.Row="2" Orientation="Horizontal">      <Button Content="OpenFile" Margin="5" HorizontalAlignment="Left" FontSize="20" Click="OpenFile_Click"/>      <Button Content="SaveInkCanvas" Margin="5" HorizontalAlignment="Left" FontSize="20" Click="SaveInkCanvas_Click"/>      <Button Content="LoadInkCanvas" Margin="5" HorizontalAlignment="Left" FontSize="20" Click="LoadInkCanvas_Click"/>      <Button Content="CopyInkCanvas" Margin="5" HorizontalAlignment="Left" FontSize="20" Click="CopyInkCanvas_Click"/>      <Button Content="PasteInkCanvas" Margin="5" HorizontalAlignment="Left" FontSize="20" Click="PasteInkCanvas_Click"/>    </StackPanel>  </Grid></Window>

using Microsoft.Win32;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Ink;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes; namespace WPF_InkCanvas{  /// <summary>  /// MainWindow.xaml 的交互逻辑  /// </summary>  public partial class MainWindow : Window  {    ViewModel viewModel;    public MainWindow()    {      InitializeComponent();       DrawingAttributes drawingAttributes = new DrawingAttributes      {        Color = Colors.Red,        Width = 2,        Height = 2,        StylusTip = StylusTip.Rectangle,        FitToCurve = true,        IsHighlighter = false,        IgnorePressure = true,       };      inkCanvasMeasure.DefaultDrawingAttributes = drawingAttributes;       viewModel = new ViewModel      {        MeaInfo = "测试······",      };       DataContext = viewModel;    }     private void InkCanvasMeasure_MouseDown(object sender, MouseButtonEventArgs e)    {     }     private void InkCanvasMeasure_MouseMove(object sender, MouseEventArgs e)    {     }     private void OpenFile_Click(object sender, RoutedEventArgs e)    {      OpenFileDialog openDialog = new OpenFileDialog      {        Filter = "Image Files (*.jpg)|*.jpg|Image Files (*.png)|*.png|Image Files (*.bmp)|*.bmp",      };      if (openDialog.ShowDialog() == true)      {        BitmapImage image = new BitmapImage();        image.BeginInit();        image.UriSource = new Uri(openDialog.FileName, UriKind.RelativeOrAbsolute);        image.EndInit();        imgMeasure.Source = image;      }    }     private void RadioButton_Click(object sender, RoutedEventArgs e)    {      if ((sender as RadioButton).Content.ToString() == "绘制墨迹")      {        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.Ink;      }       else if ((sender as RadioButton).Content.ToString() == "按点擦除")      {        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.EraseByPoint;      }       else if ((sender as RadioButton).Content.ToString() == "按线擦除")      {        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.EraseByStroke;      }       else if ((sender as RadioButton).Content.ToString() == "选中墨迹")      {        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.Select;      }       else if ((sender as RadioButton).Content.ToString() == "停止操作")      {        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.None;      }    }     private void SaveInkCanvas_Click(object sender, RoutedEventArgs e)    {      FileStream fileStream = new FileStream("inkCanvas.isf", FileMode.Create, FileAccess.ReadWrite);      inkCanvasMeasure.Strokes.Save(fileStream);      fileStream.Close();    }     private void LoadInkCanvas_Click(object sender, RoutedEventArgs e)    {      FileStream fileStream = new FileStream("inkCanvas.isf", FileMode.Open, FileAccess.Read);      inkCanvasMeasure.Strokes = new StrokeCollection(fileStream);      fileStream.Close();    }     private void CopyInkCanvas_Click(object sender, RoutedEventArgs e)    {      inkCanvasMeasure.CopySelection();    }    private void PasteInkCanvas_Click(object sender, RoutedEventArgs e)    {      inkCanvasMeasure.Paste();    }  }}

using System;using System.Collections.Generic;using System.ComponentModel;using System.Linq;using System.Text;using System.Threading.Tasks; namespace WPF_InkCanvas{  class ViewModel : INotifyPropertyChanged  {    public event PropertyChangedEventHandler PropertyChanged;     protected virtual void OnPropertyChanged(string propertyName = null)    {      if (PropertyChanged != null)        PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));    }     private string meaInfo;    public string MeaInfo    {      get => meaInfo;      set      {        meaInfo = value;        OnPropertyChanged("MeaInfo");      }    }  }}