[英]Scrolling with mouse wheel in ListBox with modified ItemsPanel
我在WPF应用程序中定义了以下ListBox:
<ListBox DockPanel.Dock="Bottom" Height="105" Name="ThumbnailsList" Background="#80FFFFF0"
SelectionChanged="ThumbnailsList_SelectionChanged">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
我想更改ItemsPanel以使用VirtualizingStackPanel来提高性能,并更改ListBox的方向(注释掉的部分)-ListBoxItems是缩略图。 但是,这使我无法使用鼠标滚轮滚动浏览ListBox项。
有什么解决方案可以保留此自定义功能,但具有鼠标滚动功能?
按照eran的要求,添加项目的代码如下:
foreach (string filename in Images)
{
Image img = new Image();
BitmapImage bmp = new BitmapImage();
try
{
using (FileStream stream = File.OpenRead(filename))
{
bmp.BeginInit();
bmp.CacheOption = BitmapCacheOption.OnLoad;
bmp.DecodePixelHeight = 75;
bmp.StreamSource = stream;
bmp.EndInit();
}
}
catch (Exception ex)
{
//commented out
}
Border b = new Border();
b.BorderBrush = Brushes.AntiqueWhite;
b.BorderThickness = new Thickness(1);
b.Child = img;
b.Effect = ef; //this is System.Windows.Media.Effects.DropShadowEffect
img.SnapsToDevicePixels = true;
img.Source = bmp;
img.Height = 75;
img.ToolTip = filename.Substring(lastSlash + 1);
ThumbnailsList.Items.Add(b);
}
您是否尝试过将HorizontalScrollBarVisibility
设置为Visible
?
<ListBox ScrollViewer.HorizontalScrollBarVisibility="Visible">
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