Data Virtualization not working
I have been trying to gain performance by implementing virtualization for my ListView.
I use the following article to achieve that :
WPF: Data Virtualization By Paul McClean http://www.codeproject.com/KB/WPF/WpfDataVirtualization.aspx
the problem is that instead of loading just a couple of pages, all the pages are actually loaded which is weird. all the items are loaded when the Control is loaded.
Here is my ListView :
<ListView ItemsSource="{Binding}"
VirtualizingStackPanel.IsVirtualizing="True"
VirtualizingStackPanel.VirtualizationMode="Recycling"
ScrollViewer.IsDeferredScrollingEnabled="True">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel>
</VirtualizingStackPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.View>
<GridView>
<GridViewColumn Width="250">
<GridViewColumn.Header>
<TextBlock Text="Part Number" Hor开发者_如何转开发izontalAlignment="Left"></TextBlock>
</GridViewColumn.Header>
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Part.PartNumber}"></TextBlock>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Description" Width="250">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Part.Description}"></TextBlock>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Current Price" Width="250">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding CurrentPrice}"></TextBlock>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Old Price" Width="250">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding OldPrice}"></TextBlock>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
I just realized that I was using a ScrollViewer (with property ScrollViewer.VerticalScrollBarVisibility="Visible") around my ListView which is why all the items were being loaded at once.
I removed it and everything now works fine.
精彩评论