C# wpf中inkcanvas上的橡皮擦 private void inkcanvas\u StrokeErased（对象发送方，路由目标） { var erasedstrokes=（发送方作为InkCanvas）。笔划； After橡皮擦行程采集=橡皮擦行程； foreach（aftererasedstrokecollection中的var项） { 删除笔画。添加（项目）； } } 私有void inkcanvas_StrokeRasing（对象发送方InkCanvasStrokeRasingEventArgs e） { var beforeerased=（发送方作为InkCanvas）。笔划； beforeerasedstrokecollection=删除前； foreach（beforeerasedstrokecollection中的var项） { 未移动行程。添加（项目）； } } 私有void btundo\u单击（对象发送者，路由目标e） { 如果（DrawingTool==“橡皮擦”| | DrawingTool==“删除”） { int length=removedstrokes.Count； for（int i=0；i

我想在

WPF

中单击撤消时再次绘制已擦除的笔划。通过上面的代码，我对单个笔划执行此操作，但我想对多个笔划执行相同的操作。 请提出任何意见

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如何通过inkcanvas的erasedbypoint方法仅获得擦除点？多少是多个笔划？例如，我在inkcanvas上画了一条线，然后它只显示一个笔划，当我从中间擦除这条线时，它分成两部分并显示两个笔划。现在我得到了线的剩余部分在擦除后的阻塞点。你们找到解决方法了吗？我也有类似的情况@用户3183760

private void inkcanvas_StrokeErased(object sender, RoutedEventArgs e)
{
    var erasedstrokes = (sender as InkCanvas).Strokes;
    aftererasedstrokecollection = erasedstrokes;
    foreach (var item in aftererasedstrokecollection)
    {
        removedstrokes.Add(item);
    }
}
private void inkcanvas_StrokeErasing(object sender InkCanvasStrokeErasingEventArgs e)
{
    var beforeerased = (sender as InkCanvas).Strokes;
    beforeerasedstrokecollection = beforeerased;
    foreach (var item in beforeerasedstrokecollection)
    {
        unremovedstrokes.Add(item);
    }
}

private void btnUndo_Click(object sender, RoutedEventArgs e)
{
    if (DrawingTool == "Eraser" || DrawingTool == "Delete")
    {
        int length = removedstrokes.Count;
        for (int i = 0; i < length; i++)
        {
            estroke = removedstrokes[i];
            inkcanvas.Strokes.Remove(estroke);
        }

        for (int i = 0; i < unremovedstrokes.Count; i++)
        {
            estroke = unremovedstrokes[i];
            inkcanvas.Strokes.Add(estroke);
        }
    }
    else
    {
        if (inkcanvas.Strokes.Count > 0)
        {
            int i = inkcanvas.Strokes.Count;
            inkcanvas.Strokes.RemoveAt(i - 1);
        }
    }
    removedstrokes.Clear();
    DrawingTool = "UnDo";
    HighlightSelectedButton(sender);
    IsDrawing = false;
    inkcanvas.EditingMode = InkCanvasEditingMode.None;
}