虚化解决加载过慢
<ComboBox x:Name="comboboxFontList"
VerticalAlignment="Top">
<ComboBox.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel />
</ItemsPanelTemplate>
</ComboBox.ItemsPanel>
</ComboBox>
避免SelectionChanged事件的第一次执行
private void ComboBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (e.RemovedItems.Count > 0)
{
if (ComboBox1.SelectedItem is DemoDto item)
{
// TODO
}
}
}