We use cookies to give you the best experience on our website. If you continue to browse, then you agree to our privacy policy and cookie policy.
|
<sync:SfListView x:Name="listView" ItemsSource="{Binding BookInfo}">
<sync:SfListView.IsScrollBarVisible>
<OnPlatform x:TypeArguments="x:Boolean">
<OnPlatform.Android>
<OnIdiom x:TypeArguments="x:Boolean" Phone="false" Tablet="false"/>
</OnPlatform.Android>
<OnPlatform.iOS>
<OnIdiom x:TypeArguments="x:Boolean" Phone="false" Tablet="false"/>
</OnPlatform.iOS>
<OnPlatform.WinPhone>
<OnIdiom x:TypeArguments="x:Boolean" Phone="true" Tablet="true"/>
</OnPlatform.WinPhone>
</OnPlatform>
</sync:SfListView.IsScrollBarVisible>
</sync:SfListView> |
Hi,Thank you for using Syncfusion Products.In SfListView, we have property “IsScrollBarVisible” for achieve your requirement “Enable/disable the ScrollBar visibility in ListView”, no need to create renderer for this. By default, the IsScrollBarVisible property value is true. You can enable/disable the scrollbar visibility for specific platforms as like below code example.Code Example[XAML]:
Doing this would affect the scrolling of the ListView but interaction like selection would still work out. You can't view the items below the viewport area.
[assembly: ExportRenderer(typeof(SfListView), typeof(CustomSfListViewRenderer))]
namespace XamarinSfListViewDemo.Droid
{
public class CustomSfListViewRenderer : ViewRenderer<SfListView,Android.Views.View>
{
private Xamarin.Forms.ScrollView scroller;
protected override void OnElementChanged(ElementChangedEventArgs<SfListView> e)
{
base.OnElementChanged(e);
var element = e.NewElement;
scroller = (Xamarin.Forms.ScrollView)typeof(SfListView).GetField("scrollView", BindingFlags.NonPublic)
.GetValue(element);
scroller.InputTransparent = true;
}
}
}
I haven't tried this code in iOS but 90% it should work. Give it a try and let me know whether it helps!
|
[assembly: ExportRenderer(typeof(SfListView), typeof(CustomSfListViewRenderer))]
namespace ListViewSample.Droid
{
public class CustomSfListViewRenderer : ViewRenderer<SfListView, Android.Views.View>
{
private Xamarin.Forms.ScrollView scroller;
protected override void OnElementChanged(ElementChangedEventArgs<SfListView> e)
{
base.OnElementChanged(e);
var element = e.NewElement;
scroller = element.GetType().GetField("scrollView", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(element) as ExtendedScrollView;
scroller.InputTransparent = true;
}
}
} |
Raise of "null reference exception" is due to the Element type which you're referencing, SfListViewWithNoScroll which doesn't have a direct element called scrollView. So Instead of this line : scroller = element.GetType().GetField("scrollView", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(element) as ExtendedListView;Use:scroller = typeof(SfListView).GetField("scrollView", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(element) as ScrollView;
|
<ContentPage.Resources>
<ResourceDictionary>
<local:KeyToValueConverter x:Key="KeyTovalueConverter"/>
</ResourceDictionary>
</ContentPage.Resources>
<listView:SfListView x:Name="listView" ItemsSource="{Binding contactsinfo}" AllowGroupExpandCollapse="True">
<listView:SfListView.DataSource >
<dataSource:DataSource>
<dataSource:DataSource.GroupDescriptors>
<dataSource:GroupDescriptor PropertyName="UserId"/>
</dataSource:DataSource.GroupDescriptors>
</dataSource:DataSource>
</listView:SfListView.DataSource>
<listView:SfListView.GroupHeaderTemplate>
<DataTemplate>
<ViewCell>
<ViewCell.View>
<Label Text="{Binding Items, Converter={StaticResource KeyTovalueConverter}}" HorizontalOptions="Start"
Margin="0,5,0,5" LineBreakMode="TailTruncation"
WidthRequest="100"/>
</ViewCell.View>
</ViewCell>
</DataTemplate>
</listView:SfListView.GroupHeaderTemplate>
</listView:SfListView> |
|
public class KeyToValueConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var contact = (value as IEnumerable).Cast<Contacts>().First();
if (contact != null)
return contact.ContactName;
else
return null;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
} |
