Last Updated: 21 Jul 2022 13:19 by ADMIN
Release R1 2021 SP1

When building against XF5 and after migrating a project you can get the following error:-

Severity Code Description Project File Line Suppression State
Error failed linking file resources. App1.Android
Error '5dp' is incompatible with attribute verticalOffset (attr) float [weak]. App1.Android
Error '10dp' is incompatible with attribute horizontalOffset (attr) float [weak]. App1.Android

It appears to be a conflict between

<PackageReferenceInclude="Xamarin.Google.Android.Material"Version="" />

and Telerik assemblies.

If a dummy app is built with that Nuget it all works fine until the Nuget

<PackageReference Include="Telerik.UI.for.Xamarin" Version="2021.1.119.1" />

is added.

So you can have one or the other but not both.

Please see this GitHub thread where its discussed more and a sample app is posted.

(I am user Gmotagi in it)




Last Updated: 22 Jun 2022 11:41 by ADMIN
Release R2 2022 SP1

DataBindingComplete event of the DataGrid should be fired when the associated data (ItemsSource) has been successfully bound to the control or any data operation like Group, Sort or Filter is applied.  Currently the event handler is not called as expected.


Last Updated: 22 Jun 2022 11:40 by ADMIN
Release R2 2022 SP1
When SignaturePad is placed inside a ScrollView, drawing lines in scroll direction inside the plot area is not working, even if the scroll view is not scrolling. Line disappears after couple of points drawn.
Last Updated: 12 May 2022 05:54 by ADMIN
Release R2 2022
when the item is too long and it spans 2 rows in the result view. When user selects this long item and the drop-down is closed, the selected item text is right-aligned in the control. 

Last Updated: 11 May 2022 14:50 by ADMIN
Release R2 2022
Created by: Amitesh
Comments: 0
Category: Entry
Type: Bug Report
On Android if the text is longer than the input field and it is set from OnAppearing method, RadEntry displays the ending of the text instead of the beginning.

Also, the issue can be reproduced

when the Entry text is set in code behind, for example on button click:
private void Button_Clicked(object sender, System.EventArgs e)
            this.radEntry.Text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. ";

inside the AutoCompleteView control when select an item from the suggestion items list. 
Last Updated: 31 Mar 2022 13:59 by ADMIN
Release Release 2021.1.331 (R1 2022 minor release)
With the Telerik UI for Xamarin release 2022.1.222.1 SkiaSharp version was updated to 2.80.3 
but inside the Telerik.UI.for.Xamarin.SkiaSharp NuGet package the SkiaSharp.Views.Forms version is not updated. The version is 1.68.0
Last Updated: 25 Feb 2022 07:24 by ADMIN
Release R1 2022 SP
Created by: robin
Comments: 10
Category: ConversationalUI
Type: Bug Report

We have implemented chat functionality using Telerik RadChat component. The problem is that the scroll functionality doesn't scroll fully to the bottom on IOS. It randomly stops somewhere in between. The same code runs perfectly on Android. Below I have attached an example code of our solution.

          Author="{Binding Me}"
          ItemsSource="{Binding Items}"
          ItemConverter="{StaticResource SimpleChatItemConverter}" 
          SendMessageCommand="{Binding NewMessageCommand}"
          ItemTemplateSelector="{StaticResource CustomChatItemTemplateSelector}"
Last Updated: 24 Feb 2022 10:20 by ADMIN
Release R1 2022 SP

on Android devices with API 31 the app crashes when using context menu. 

Actually this is the native android context menu which crashes the app, the RichTextEditor context menu is not displayed. 

The RichTextEditor context menu gets displayed when closing the keyboard and then tap on the text.

Last Updated: 24 Feb 2022 09:30 by ADMIN
Release R1 2022 SP
When there are more messages in Chat on initial load, it should scroll to show the most recent ones.
Last Updated: 10 Feb 2022 09:28 by ADMIN
Release 2020.3.1207 (R3 2020 minor release)

Use the following code:

<StackLayout Orientation="Vertical">
    <telerikInput:RadAutoCompleteView ItemsSource="{Binding Source}"
                                        TextSearchPath="Name" />
    <telerikInput:RadAutoCompleteView ItemsSource="{Binding Source}"
    <telerikInput:RadAutoCompleteView ItemsSource="{Binding Source}"

Steps to reproduce: 

On the first control, enter a value not in the list.
Click in the control to accept the value.
On the second control, enter a value not in the list
Hit the Tab key on the keyboard.
Click on the first control again
Focus bounces around. You must restart the app to fix the issue.



Last Updated: 19 Jan 2022 13:58 by ADMIN
Release R1 2022
On Samsung phones, the decimal separator and minus sign are in the same keyboard button and you press it once for the decimal sign to be written and press it twice for the minus sign to be written. After some tests, I found that this works fine on cultures that use "." as the decimal separator, but not on cultures that use "," (like Portuguese).


What happens is that no matter how many times you press the ", / -" button, it never writes the minus sign, therefore doesn't allow writing negative numbers.
Last Updated: 19 Jan 2022 13:52 by ADMIN
Release R1 2022

If you set the RadDateTimePicker's IsVisible value to false and there is navigation occurring, the internal logic tries to dispose the RadPopup and an exception is thrown on Android.

This feedback item is to ask that you attempt to add internal protections to avoid this from happening.


Here is the exception stacktrace in case it is useful:

JniPeerMembers.AssertSelf (Java.Interop.IJavaPeerable self)
JniPeerMembers+JniInstanceMethods.InvokeVirtualVoidMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
PopupWindow.set_ContentView (Android.Views.View value)
RadPopup.ClearAndroidContext ()
RadPopup.UpdatePopupContext ()
RadPopup.OnPlacementTargetRendererChanged ()
PopupBase.PlacementTarget_PropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e)
PopupBase+<>c.<AttachWeakEventListenerForPlacementTargetPropertyChanged>b__99_0 (Telerik.XamarinForms.Primitives.PopupBase listener, System.Object sender, System.ComponentModel.PropertyChangedEventArgs eventArgs)
WeakEventListener`3[TListener,TEventSource,TEventArgs].OnEvent (System.Object sender, TEventArgs eventArgs)
(wrapper delegate-invoke) <Module>.invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)
BindableObject.OnPropertyChanged (System.String propertyName)
Element.OnPropertyChanged (System.String propertyName)
BindableObject.ClearValue (Xamarin.Forms.BindableProperty property, System.Boolean fromStyle, System.Boolean checkAccess)
BindableObject.ClearValue (Xamarin.Forms.BindableProperty property)
Platform+<>c__DisplayClass45_0.<Cleanup>g__DoCleanup|0 ()
Platform.Cleanup (System.Collections.Generic.List`1[T] viewsToRemove, System.Collections.Generic.List`1[T] renderersToDispose)
Platform.SetPage (Xamarin.Forms.Page newRoot)
Platform.Dispose ()
FormsAppCompatActivity.OnDestroy ()
Activity.n_OnDestroy (System.IntPtr jnienv, System.IntPtr native__this)
(wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.8(intptr,intptr)

Last Updated: 10 Nov 2021 15:01 by ADMIN
Release R3 2021 SP

there is a mistake with the accessibility modifier for `Telerik.XamarinForms.RichTextEditor.RichTextPasteType`. When it is Internal it's not possible to use the PasteCommand since it requires that type as input. 



use reflection to get the enum

var assembly = typeof(RadRichTextEditor).Assembly;
var type = assembly.GetType("Telerik.XamarinForms.RichTextEditor.RichTextPasteType");
var obj = Enum.ToObject(type, 1);
await Clipboard.SetTextAsync("A pasted text");
var canExecute = richTextEditor.PasteCommand.CanExecute(obj);

Last Updated: 03 Nov 2021 18:12 by ADMIN
Release 2021.2.728 (R2 2021 minor release)
Created by: Vlad
Comments: 23
Category: UI for Xamarin
Type: Bug Report

There seems to be 2 issues with Telerik ui for xamarin and Xamarin.AndroidX.Core versions and newer where A) Linker seems to be failing when set to "Sdk Assemblies Only" on Visual Studio 16.9.0.


The other issue is with Telerik RadListView and same  AndroidX.Core at runtime I am getting the following exception:

System.TypeLoadException: 'VTable setup of type Telerik.XamarinForms.DataControlsRenderer.Android.ListViewAccessibilityDelegateCompat failed'


Please advise

Last Updated: 12 Oct 2021 10:09 by ADMIN
Release R3 2021
System.ArgumentException: Unsupported touch action type.
Parameter name: actionType
   at Telerik.XamarinForms.SkiaSharp.Interaction.SkiaViewInteractionAdapter.Convert(SKTouchAction actionType)
   at Telerik.XamarinForms.SkiaSharp.Interaction.SkiaViewInteractionAdapter.OnTouch(SKTouchEventArgs e)
   at Telerik.XamarinForms.SkiaSharp.Interaction.SkiaViewInteractionAdapter.GlView_Touch(Object sender, SKTouchEventArgs e)
   at SkiaSharp.Views.Forms.SKGLView.OnTouch(SKTouchEventArgs e)

is thrown when scrolling the document using the mouse wheel and using latest official SkiaSharp Views Forms version 2.80.3
Last Updated: 08 Oct 2021 15:40 by n/a
Release 2020.3.1207 (R3 2020 minor release)

if you look at the .nuspec file for the Telerik.UI.for.Xamarin.Documents.Flow package there is an entry in the 

<framework> assemblies element;

<frameworkAssembly assemblyName=”WindowsBase” targetFramework=””/ >

This is what causes NuGet to drag the WindowsBase assembly in.

 we cannot build the iOS project - we get the following error.

The type 'NotifyCollectionChangedAction' exists in both 'System, Version=, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' and 'WindowsBase, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

We are not referencing the WindowsBase assembly directly, but on analyzing the Nuget dependencies we found the following dependency chain;

Telerik.UI.for.Xamarin (2020.3.1106.1) -> Telerik.UI.for.Xamarin.Documents.Flow (2020.3.1019) -> WindowsBase (Framework Assembly)

 it seems that WindowsBase (and PresentationCore which is also included) are not intended for Xamarin iOS or Android applications.


Last Updated: 04 Oct 2021 13:31 by ADMIN
Release 2019.2.708 (R2 2019 minor release)

The pdf content is not visualized properly on UWP and iOS when the file is loaded from a stream. 

Also if you try to load PDF twice on the same PDF Viewer, an exception is raised.

Last Updated: 16 Jun 2021 11:41 by ADMIN
Release R2 2021 SP1
The last columns are disappearing on dynamic content changed and are rendered as soon as the user taps on any item.  The issue occurs with devices/emulators with bigger screens when there are more columns shown -  tablets or devices in landscape mode.
Last Updated: 16 Jun 2021 11:14 by ADMIN
Release R2 2021 SP1
Last Updated: 04 Jun 2021 14:32 by ADMIN
Release R2 2021
Visual Studio for Mac 8.9 no longer includes the Xamarin.Forms previewer in favor of XAML Hot Reload.  This leads to the following exception when trying to install Telerik Xamarin VS for Mac extension: "
Xamarin VS for Mac extension throws "Xamarin.FormsPreviewer v.4.15 could not be found in any repository" on install".
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