试图擦除inkcanvas中单击一条线绘制

Question

我试图擦除inkcanvas中单击绘制的线条。 我的要求是，如果我在给定的区域上绘制一条线或任何图案，它将删除所有绘制在一个点击线，并再次绘制任何东西，然后单击'擦除'按钮将清除当前屏幕上绘制的所有线。

的XAML

<Grid x:Name="Bg_BigRect" Background="White" 
     Width="310" Height="440" 
     RelativePanel.Below="Bg_Rect" 
     Margin="24,10,0,0"> 
    <Image x:Name="Trans_Tex" Source="WorkBook/T0.png"        
      Margin="-10,0,0,20" 
      Width="310" Height="370"/> 
     <InkCanvas x:Name="ink"/> 
</Grid> 

C＃代码

public WorkBook() 
{ 
    this.InitializeComponent(); 
    ink.InkPresenter.InputDeviceTypes = CoreInputDeviceTypes.Mouse | CoreInputDeviceTypes.Touch;  

    // Set initial ink stroke attributes. 
    InkDrawingAttributes drawingAttributes = new InkDrawingAttributes(); 
    drawingAttributes.Color = Windows.UI.Colors.Black; 
    drawingAttributes.IgnorePressure = false; 
    drawingAttributes.FitToCurve = true; 
    ink.InkPresenter.UpdateDefaultDrawingAttributes(drawingAttributes); 
} 

private void W_ClearTap(object sender, TappedRoutedEventArgs e) 
{ 
    this.ink.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.Erasing; 
} 

参考图像

Answer 1

对于UWP的应用程序，你可以使用InkStrokeContainer.Clear方法。例如：

ink.InkPresenter.StrokeContainer.Clear();