Question

我在wpf canvas上有省略号我想选择多个省略号并删除特定的

选择Ellipse如何使用List<Ellipse>

实现

我有删除逻辑的代码。

if (SelectedCanvasItem.VisualHit.GetType().BaseType == typeof(Shape))
{
    var SelectedShapeTag = SelectedCanvasItem.VisualHit.GetValue(Shape.TagProperty);
    if (SelectedCanvasItem != null)
    {
        //Ellipse SelectedHole = (Ellipse)SelectedShapeTag;
        grdGrid.Children.Remove(SelectedCanvasItem.VisualHit as Shape);
        //SetActivePattern(SelectedHole.ParentPattern);
        //SelectedHoleSelectedHole.ParentPattern.CurrentHole = SelectedHole;
        return; //Get out, we're done.
    }
}

Answer 1

如果我理解正确，那么：

1）您应该将VisualStates写入选定和未选择的项目 - 让用户了解选择了那些elipses。 2）在选择时，你可以创建一个列表列表ToDelete和用户准备就绪 - 删除它们

如果您只想在XAML中实现它，我认为它无法实现。

但是如果要逐个删除行为，则可以向每个椭圆添加行为 - 从表单或类似内容中删除。

C＃：

List<string> Deletable_elipses

Elipse_Tap()
{
Elipse tappedElipse = sender as Elipse;
if (Deletable_elipses.Contains(tappedElipse.Name))
{
    List.Remove(tappedElipse.Name); //Add if not in list to delete means that user unselected it
}
else
{
    List.Add(tappedElipse.Name); //Add if not in list to delete means that user selected it
}

}

当你想要删除elipses：

foreach (string name in Deletable_elipses)
{
    Elipse current = (Elipse)this.FindName(name);
    current. //TODO logic to delete
}

使用鼠标点击选择画布项并删除特定的椭圆

1 个答案: