如何在UIElement上重置DesiredSize
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我有一个列表框，其中包含任意数量的size0ѭ，其大小未知。
我希望能够在添加每个项目后跟踪列表框的建议大小。这将使我可以将一个大列表（例如100个项目）分成几个（例如10个）视觉大小大致相同的较小列表，而不管列表中每个元素的视觉大小如何。
但是，在第一次调用Measure时，似乎Measure传递仅影响
ListBox
DesiredSize
public partial class TestWindow : Window
{
public TestWindow()
{
InitializeComponent();
ListBox listBox = new ListBox();
this.Content = listBox;
// Add the first item
listBox.Items.Add(\"a\"); // Add an item (this may be a UIElement of random height)
listBox.Measure(new Size(double.MaxValue, double.MaxValue)); // Measure the list box after the item has been added
Size size1 = listBox.DesiredSize; // reference to the size the ListBox \"wants\"
// Add the second item
listBox.Items.Add(\"b\"); // Add an item (this may be a UIElement of random height)
listBox.Measure(new Size(double.MaxValue, double.MaxValue)); // Measure the list box after the item has been added
Size size2 = listBox.DesiredSize; // reference to the size the ListBox \"wants\"
// The two heights should have roughly a 1:2 ratio (width should be about the same)
if (size1.Width == size2.Width && size1.Height == size2.Height)
throw new ApplicationException(\"DesiredSize not updated\");
}
}
listBox.InvalidateMeasure();
ListBox
ItemsControl
没有找到相关结果
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芦歉竭皑