Unplanned
Last Updated: 11 Apr 2022 14:53 by n/a
Null Reference Exception is thrown when the ListView is initially grouped with more than 1 group descriptor and then the control is populated using Range Observable collection. 
Under Review
Last Updated: 09 Mar 2022 13:01 by Robert
Created by: Robert
Comments: 11
Category: ListView
Type: Bug Report
0

This is from our production app. Cannot reproduce it, don't know exactly when or why it happens; we just have crashes logged to have happened to 9 users in the past year with a total of 30 occurences.

These are unhandled UWP exceptions, which mean that our app goes poof :)

System.ArgumentException: Value does not fall within the expected range at
System.ThrowHelper.ThrowAddingDuplicateWithKeyArgumentException(Object) + 0xf     at
Telerik.UI.Xaml.Controls.Data.ListView.Model.BaseLayoutStrategy.RecycleLocally() + 0x320     at Telerik.UI.Xaml.Controls.Data.ListView.Model.BaseLayoutStrategy.MeasureContent(RadSize, Double, Double) + 0xd     at Telerik.UI.Xaml.Controls.Data.ListView.Model.LayoutController.MeasureVertical(RadSize) + 0x1b9     at Telerik.UI.Xaml.Controls.Data.ListView.Model.LayoutController.MeasureContent(RadSize) + 0x42     at Telerik.UI.Xaml.Controls.Data.ListViewModel.MeasureContent(RadSize) + 0x2e     at Telerik.UI.Xaml.Controls.Data.RadListView.OnContentPanelMeasure(RadSize) + 0x17f     at Telerik.UI.Xaml.Controls.Data.ListView.ListViewPanel.MeasureOverride(Size) + 0x60     at Windows.UI.Xaml.FrameworkElement.global::Windows.UI.Xaml.IFrameworkElementOverrides.MeasureOverride(Size) + 0x26

 

System.ArgumentException: An item with the same key has already been added    at
System.ThrowHelper.ThrowAddingDuplicateWithKeyArgumentException(Object) + 0xf     at Telerik.UI.Xaml.Controls.Data.ListView.Model.BaseLayoutStrategy.RecycleLocally() + 0x320     at Telerik.UI.Xaml.Controls.Data.ListView.Model.BaseLayoutStrategy.MeasureContent(RadSize, Double, Double) + 0xd     at Telerik.UI.Xaml.Controls.Data.ListView.Model.LayoutController.MeasureVertical(RadSize) + 0x1b9     at Telerik.UI.Xaml.Controls.Data.ListView.Model.LayoutController.MeasureContent(RadSize) + 0x42     at Telerik.UI.Xaml.Controls.Data.ListViewModel.MeasureContent(RadSize) + 0x2e     at Telerik.UI.Xaml.Controls.Data.RadListView.OnContentPanelMeasure(RadSize) + 0x17f     at Telerik.UI.Xaml.Controls.Data.ListView.ListViewPanel.MeasureOverride(Size) + 0x60     at Windows.UI.Xaml.FrameworkElement.global::Windows.UI.Xaml.IFrameworkElementOverrides.MeasureOverride(Size) + 0x26

Declined
Last Updated: 10 Feb 2022 07:55 by ADMIN
Created by: Adrian
Comments: 6
Category: ListView
Type: Bug Report
0
ListView was always refreshing smooth but when was installed from app store the listvew refreshes not smooth at all
Unplanned
Last Updated: 19 Jan 2022 11:07 by ADMIN
a memory leak occurs when the control is inside a TabView.

Workaround: 
Set IsContentPreserved property to the TabView control
Unplanned
Last Updated: 10 Dec 2021 09:52 by ADMIN

when we try to add a dynamic AutomationId in each item of the list (something like AutomationId="{Binding Id}"), the AutomationId is not provided to the elements we see in the appium inspector. 

Works with fixed values

Unplanned
Last Updated: 07 Dec 2021 11:57 by ADMIN
When you place a Label with TextType set to "Html" inside ListView TemplatedCell, the ListVIew renders only the items currently in the viewport - if you scroll down, the listview is empty. 
Completed
Last Updated: 18 Oct 2021 14:56 by ADMIN
Release R1 2020 SP1
Created by: Ron
Comments: 2
Category: ListView
Type: Feature Request
4
Users should be allowed to disable swiping in one direction only.
Declined
Last Updated: 31 Aug 2021 13:12 by Tom

When using a RadListview with a Grid or a Stack Layout in iOS I get the following exception. I haven't tested using the stacklayout outside of the RadListView nor have I tested it outside of the ItemTemplateSelector


Telerik.XamarinForms.Common.NotRegisteredRendererException: There is no renderer registered for the specified type: Xamarin.Forms.Grid
It works fine on Android. Below is the xaml I'm using.


<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:telerikDataControls="clr-namespace:Telerik.XamarinForms.DataControls;assembly=Telerik.XamarinForms.DataControls"
             xmlns:telerikListView="clr-namespace:Telerik.XamarinForms.DataControls.ListView;assembly=Telerik.XamarinForms.DataControls"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:models="clr-namespace:AlertTest.Models"
             mc:Ignorable="d"
             xmlns:views="clr-namespace:AlertTest.Views"
             x:Class="AlertTest.Views.MainPage">
    <ContentPage.Resources>
        <ResourceDictionary>
            <DataTemplate x:Key="NonDivisibleTemplate">
                <Grid>
                    <StackLayout Orientation="Vertical" Padding="10" Spacing="0" BackgroundColor="Yellow" InputTransparent="True" Unfocused="StackLayout_Unfocused">
                        <Label Text="{Binding ItemText}"/>
                    </StackLayout>
            </DataTemplate>
            <DataTemplate x:Key="DivisibleTemplate">
                <Grid>
                    <StackLayout Orientation="Vertical" Padding="15" Spacing="0" BackgroundColor="White" Unfocused="StackLayout_Unfocused">
                        <Label Text="{Binding ItemText}" FontSize="Large" HorizontalTextAlignment="Center"/>
                        <Label Text="{Binding ItemText}" FontSize="Small" FontAttributes="Italic" TextColor="Gray"/>
                    </StackLayout>
                </Grid>
            </DataTemplate>

            <models:MyDataTemplateSelector
                x:Key="MyTemplateSelector"
                NonDivisibleTemplate="{StaticResource NonDivisibleTemplate}"
                DivisibleTemplate="{StaticResource DivisibleTemplate}" />
        </ResourceDictionary>
    </ContentPage.Resources>

    <StackLayout VerticalOptions="StartAndExpand">
        <!-- Place new controls here -->
        <views:FloatingLabelEntry EntryText="{Binding EntryText}" Margin="20" BackgroundColor="Yellow" PlaceholderText="{Binding PlaceholderText}"/>
        <Entry TextChanged="Entry_TextChanged" BackgroundColor="AliceBlue" Margin="20"/>
        <telerikDataControls:RadListView x:Name="listView" ItemsSource="{Binding ListItems}" ItemTemplateSelector="{StaticResource MyTemplateSelector}" SelectionMode="Single" IsItemSwipeEnabled="False" >
            <!--<telerikDataControls:RadListView.ItemSwipeContentTemplate>
                <DataTemplate>
                    -->
            <!--<Grid Margin="0"
                  Padding="0"
                  ColumnSpacing="0"
                  RowSpacing="0">-->
            <!--<Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>-->
            <!--
                    <StackLayout Orientation="Horizontal" HorizontalOptions="FillAndExpand">
                        <Label BackgroundColor="#2474d2"
                       HorizontalTextAlignment="Start"
                               HorizontalOptions="StartAndExpand"
                       Text="Mark as read"
                       TextColor="White"
                       VerticalTextAlignment="Center" />
                        <Label Grid.Column="2"
                       BackgroundColor="Red"
                       HorizontalTextAlignment="End"
                               HorizontalOptions="EndAndExpand"
                       Text="delete"
                       TextColor="White"
                       VerticalTextAlignment="Center"/>
                    </StackLayout>
                    -->
            <!--</Grid>-->
            <!--
                </DataTemplate>
            </telerikDataControls:RadListView.ItemSwipeContentTemplate>-->
        </telerikDataControls:RadListView>
    </StackLayout>
</ContentPage>

Unplanned
Last Updated: 22 Jun 2021 09:27 by ADMIN
When dismissing the swipe by swiping to close, the ItemTap event is fired on Android.  
Completed
Last Updated: 13 Apr 2021 11:57 by ADMIN
Release 2021.1.413 (R1 2021 minor release)
If ListView has PressedItemStyle defined and the end user holds onto any control, such as Label, for example, placed outside ListView, the PressedItemStyle is applied to all items. Can only be reproduced on Android.
Completed
Last Updated: 13 Apr 2021 11:56 by ADMIN
Release 2021.1.413 (R1 2021 minor release)
When you have Automatic LoadOnDemandMode enabled and use LoadOnDemand event to load the items,  the event is fired multiple times unnecessarily.
Unplanned
Last Updated: 17 Mar 2021 08:57 by ADMIN

Telerik RadListView with two Columns - they are Thumbnails with a tap gesture. When we change the Spancount to 1 there is no right border line but when set back to 2 it shows as the screenshot on IOS, 

The issue happens on iPhone 11, XR, devices with a notch, and when ListViewGridLayout is with SpanCount="2".



Workaround: Set the background color of the ListViewItemStyle to Transparent

<telerikDataControls:RadListView.ItemStyle>
    <telerikListView:ListViewItemStyle BorderWidth="0" 
                                        BackgroundColor="Transparent"/>
</telerikDataControls:RadListView.ItemStyle>

 

Unplanned
Last Updated: 04 Mar 2021 09:50 by ADMIN
I need to change the icon displayed in the activity indicator, its width and height, and display some text.
Declined
Last Updated: 02 Mar 2021 06:54 by ADMIN
Created by: Jason
Comments: 1
Category: ListView
Type: Bug Report
0

Hello, could you provide some guidance about the following situation....

 

I have a scenario using the RadListView that implements a PropertyGroupDescriptor for a property attached to my ObservableCollection<T>, where the property that it is monitoring is string value.  The dataset is designed that it may have only one grouping before an item is selected them the dataset will have two different groupings.  One the data changes, the ListView updates to show that there are two different groups but the group header doesn't change and neither does the cell content.  If I click on the GroupHeader of the new section, then it updates to reflect the change in data.  Is there a way to get the data to change in the Listview with some kind of Refresh so it stays up to date with the data.

Seeing it on iOS right now.

 

Thanks

Unplanned
Last Updated: 01 Mar 2021 07:55 by ADMIN
We have RadListView and its ItemTemplate there is a RadPopup control (shown as a context menu). If we open and close the popup, then ListView Pull To Refresh event is not triggering.  This issue is only happening on iOS devices whereas same code is working on Android devices. 
Completed
Last Updated: 24 Feb 2021 15:05 by ADMIN
Release R1 2021 SP1

After I updated to `2021.1216.1-hotfix` (to solve this problem in Android and Google Material) the RadListView's LoadOnDemand automatic  stopped working 

 

Workaround:

I've had to downgrade Xamarin.Google.Android.Material to v1.1.0.5 and use the latest stable release of Telerik UI v2021.1.119.1 which restored the functionality.


Unplanned
Last Updated: 18 Feb 2021 15:57 by ADMIN
After a reorder operation has been started, and the user drops down the item, every item between original position and new position is animated again as if refreshing the entire Ui of those items.
Completed
Last Updated: 07 Dec 2020 16:10 by ADMIN
Release 2020.3.1207 (R3 2020 minor release)

Changing a property on an item that is involved with grouping and sorting and then removing and re-adding the item to the collection results in the list being in an invalid state (e.g. duplicate items, incorrect template, etc.)

Error message can be reproduced on iPhone 11 Simulator iOS 13.6 

[UICollectionView] Invalid update: invalid number of items in section 0.  The number of items contained in an existing section after the update (4) must be equal to the number of items contained in that section before the update (4), plus or minus the number of items inserted or deleted from that section (1 inserted, 0 deleted) and plus or minus the number of items moved into or out of that section (0 moved in, 0 moved out). - will perform reloadData. UICollectionView instance: <TKCollectionView: 0x7f8525b86600; baseClass = UICollectionView; frame = (0 0; 414 725); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x600001232bb0>; layer = <CALayer: 0x6000019b0520>; contentOffset: {0, 0}; contentSize: {414, 453}; adjustedContentInset: {0, 0, 0, 0}; layout: <TKListViewLinearLayout: 0x7f8524f5e400>; dataSource: <Telerik_XamarinForms_DataControlsRenderer_iOS_TKExtendedListView: 0x7f8524f5b590; frame = (0 0; 414 725); layer =
 <CALayer: 0x6000019b03a0>>>; currentUpdate: [UICollectionViewUpdate - 0x7f8526897fc0: old:<UICollectionViewData: 0x6000025f4000> new<UICollectionViewData: 0x6000025f47e0> items:<(
    "I(0,3)"
)>]

 

Unplanned
Last Updated: 09 Nov 2020 10:48 by ADMIN
When ListView is grouped with sticky group headers enabled, and items have dynamic size in order to adjust their content, the ListView is not rendered correctly when scrolled.
Completed
Last Updated: 22 Oct 2020 15:32 by ADMIN
Release R3 2020 SP1
Cannot access a disposed object exception on Samsung Galaxy 8 and Galaxy 10
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