Maintain the scroll position of ListView after clearing the filter

This example demonstrates how to maintain the scroll position when applying and clearing the filter of items at runtime.

Sample

<Grid>
    <SearchBar x:Name="filterText"
        Placeholder="Search here to filter"
        Grid.Row="0" />

    <listView:SfListView x:Name="listView" Grid.Row="1"
                         ItemTemplate="{StaticResource ItemTemplate}"
                         ItemsSource="{Binding ContactsInfo}">
        <listView:SfListView.Behaviors>
            <local:Behaviours/>
        </listView:SfListView.Behaviors>
    </listView:SfListView>
</Grid>

private void SearchBar_TextChanged(object sender, TextChangedEventArgs e)
{
   if (searchBar.Text != "")
      position = scrollview.ScrollY;

   searchBar = (sender as SearchBar);
   if (listView.DataSource != null)
   {
       this.listView.DataSource.Filter = FilterContacts;
       this.listView.DataSource.RefreshFilter();
   }
   if (searchBar.Text == "")
      listView.ScrollTo(position);
   else if (searchBar.Text == "")
      listView.ScrollTo(position);
}

See How to maintain the scroll position of ListView after clearing the filter for more details.

Requirements to run the demo

• Visual Studio 2017 or Visual Studio for Mac.
• Xamarin add-ons for Visual Studio (available via the Visual Studio installer).

Troubleshooting

Path too long exception

If you are facing path too long exception when building this example project, close Visual Studio and rename the repository to short and build the project.