Rendering ListBox takes too long on Windows Phone
- by Bhawk1990
I am working on a Windows Phone 7 Application using Local SQLite Database and I'm having an issue with the rendering time of pages that use DataBinding.
Currently it takes 60-70ms to retrieve the data from the database. Then it takes about 3100ms to render the data retrieved using a ListBox with DataBinding.
Here you can see the DataTemplate of the ListBox:
<DataTemplate x:Key="ListBoxItemTemplate">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="68" />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<TextBlock x:Name="TimeColumn"
Text="{Binding TimeSpan}" Grid.Column="0" Grid.Row="0"
Foreground="White" HorizontalAlignment="Center" VerticalAlignment="Center" />
<TextBlock Text="{Binding Stop.StopName}" Grid.Column="1" Grid.Row="0"
Margin="15,0,0,0" TextWrapping="NoWrap" Foreground="Black"
HorizontalAlignment="Left" VerticalAlignment="Center" />
</Grid>
</DataTemplate>
Comment: I have tried it using Canvas instead of Grid too, same result.
Then, the database loads data into a CSList (using ViciCoolStorage) and that gets Binded to the ListBox:
StationList.ItemsSource = App.RouteViewModel.RouteStops;
Comment: I have tried to add the elements of the CSList to an ObservableCollection and bind that to the interface but didn't seem to change anything.
Question:
Am I doing something wrong that results in a huge load time - even if just loading 10 elements -, or this is normal? Do you have any recommendations to get a better performance with DataBinding?
Thank you for your answers in advance!
