Hi Team,

I implemented radcheckbox in my xamarin telerik application. In which i select checkbox and afterword i post some data through webAPI. After completion of posting data i got response from server and my app got crashed and show me following stack trace data,

  at Telerik.XamarinForms.PrimitivesRenderer.iOS.CheckBoxRenderer.OnElementDetached (Telerik.XamarinForms.Primitives.RadCheckBox oldElement) [0x00025] in <f3723b4c1d3f406496717d69142c8f84>:0 

  at Telerik.XamarinForms.Common.iOS.IosRendererBase`2[S,T].Dispose (System.Boolean disposing) [0x0001f] in <81c15264f2164ef79a02e84ed79e8bfd>:0 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.14.0.114/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose (System.Boolean disposing) [0x0003f] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose () [0x00000] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Platform.iOS.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x00058] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.14.0.114/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildRemoved (Xamarin.Forms.VisualElement view) [0x0003e] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildRemoved (System.Object sender, Xamarin.Forms.ElementEventArgs e) [0x0000f] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Element.OnChildRemoved (Xamarin.Forms.Element child) [0x00007] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:343 

  at Xamarin.Forms.VisualElement.OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:750 

  at Xamarin.Forms.Layout`1[T].OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in <4542de7f0f544d51b46d63bd15d5f6b5>:0 

  at Xamarin.Forms.Layout.OnInternalRemoved (Xamarin.Forms.View view) [0x00012] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:464 

  at Xamarin.Forms.Layout.InternalChildrenOnCollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x0002b] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:427 

  at (wrapper delegate-invoke) <Module>.invoke_void_object_NotifyCollectionChangedEventArgs(object,System.Collections.Specialized.NotifyCollectionChangedEventArgs)

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00018] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedAction action, System.Object item, System.Int32 index) [0x00009] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].RemoveItem (System.Int32 index) [0x00021] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.Collection`1[T].Remove (T item) [0x00027] in <939d99b14d934342858948926287beba>:0 

  at Xamarin.Forms.Layout.OnInternalAdded (Xamarin.Forms.View view) [0x0000b] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:451 

  at Xamarin.Forms.Layout.InternalChildrenOnCollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00078] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:443 

  at (wrapper delegate-invoke) <Module>.invoke_void_object_NotifyCollectionChangedEventArgs(object,System.Collections.Specialized.NotifyCollectionChangedEventArgs)

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00018] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedAction action, System.Object item, System.Int32 index) [0x00009] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

My xaml code,

<telerikControls:RadCheckBox IsChecked="{Binding IsSelected, Mode=TwoWay}" HorizontalOptions="Center" VerticalOptions="Center" />

My model class code,

private bool _isSelected;
        public bool IsSelected
        {
            get { return _isSelected; }
            set
            {
                _isSelected = value;
            }
        } 

Version information,

Xmarin form version : 4.1.0

Telerik UI version : 2019.2.802.1

iOS version 12.2

It would be a good to have function to be able to swipe on the header and also to be able to swipe on the content area to go to next tab. 

This request is for iOS and Android

I would like to extend my XF project to Windows Presentation Framework (WPF) and MacOs when possible, both now supported by XF.

Request is that Telerik begin to include some work in these areas in its near-future roadmaps.

Hello Team,

                     Currently we are working with Telerik xamarin forms application,We are using radlistview.I want to scroll and select item with up and down arrow keys.Can we have any sample on this.

Thanks & regards

Uday raj

Following swipe gesture not fired

<telerikInput:RadCalendar.GestureRecognizers>
               <SwipeGestureRecognizer Swiped="SwipeGestureRecognizer_Swiped" Threshold="10"/>
 </telerikInput:RadCalendar.GestureRecognizers>

when swiping left or right swipe gesture should detect it.

or

when swiping on Multiday calendar add ability to decide swipe how many days back and forth (a property)

Hello ,

An Admin say me to explain a way to use a QrCode export in PDF .

So what we need ?

I use your RadBarcode to create a barcode so simple . But now this QrCode i want to get him as an imageStream and then use it on a PDFCreator .

For the moment i try to create a view with QrCode -> export this view as an Image -> change that image on ImageStream -> Use this ImageStream on PDfCreator .

I hope you understand me !

Sincerly,

Anthony Ranuuzzi

As the subject:

Before upgrading to the latest version of Telerik Controls, the Drag/Drop functionality worked correctly but after upgrading the list no longer updates and the item moved returns back to the original position.

Not using "ReorderEnded", everything works fine but this is needed to detect that something has been moved. 

When you work with mobile one of the major issues I have found is that the picker does not allow filtering so when you have more than a hundred of items the user can select on but you are displaying a thousand it’s kind of complicated, so a filtered picker would be awesome for developers that are working with Telerik controls

I have a RadLegend that is within a portion of the UI that has its visibility toggled with IsVisible. The logical tree is as follows (it's a custom styled tab UI):

MasterDetailPage -> Detail -> ContentPage -> StackLayout -> Grid (IsVisible bound to "ShowData") -> StackLayout (IsVisible bound to "ShowCategoryData") -> StackLayout -> RadLegend

Sometimes it's visible, sometimes it disappears after one of its parent control's visibility changes, sometimes it reappears. Not sure what the rhyme or reason is on when it happens. Seems to happen more on iOS than on Android, but I've seen it happen on both.

Full XAML for the page it happens on is attached.

Provide a ComboBox-like filtering functionality.

With the current feature set, this might be achieved by simply allowing all the items to be visible in the SuggestionsView when the Entry is focused (instead of showing no results until filtering has started)

Add the ability to create a TablView without any header. This could be usful in case you want to host a few ContentView in each tab and change grammatically the select tab.

Also, a SelectedItemIndex property will be useful as well.

Thanks,
Mano

Xamarin.Forms library that allows to have for Google-Map-Like sliding panel from bottom of the screen. 

A custom Searchbar that could be display over navigation bar. (Ex: See WhatsApp)

https://docs.microsoft.com/en-us/xamarin/xamarin-forms/platform/
Xamarin Forms is growing! Does your controls-set plans to grow with it??

I'm currently working on a new project, and had to drop the usage of telerik's products, because its lack of support to other platforms.

What are your plans on this subject?

It would be great if we could have support to (but not limited to): Android, IOS, UWP (Mobile and Desktop "win10"), WPF (For Desktop Applications on win7,8,10), GTK# (Linux) and macOS.

I'm sure I wouldn't be the only one to buy your products if you upgrade yours platforms support.

Thanks!

Using Visual Studio for Mac, added packages using telerik nugget server, added radCalendar in xaml code. preview crashes and exception report window pops up.

Add gesture support to DataGrid, similar to the gestures found in RadListView (reorder, tap and hold, item swipe, pull to refresh, etc).

Currently, the DataGrid's SelectionStyle uses a DataGridBorderStyle object. This doesn't have a TextColor property.

This request is for the ability to have a different TextColor for rows that are selected. without the need for relying on the bound object values/triggers/etc.

Please add support for ListViewCachingStrategy to the ListView. It's performance for large collection of items makes it unusable for production.

Currently, the AutoCompleteBox's Tokens property is of type Collection<object>, this presents a problem when adding and removing items programmatically as there is no observability.

When an item is added or removed, the UI is not updated even though the token s collection has been. 

Here is a simple repro:

private void RadListView_OnItemTapped(object sender, ItemTapEventArgs e)
{
    // For this example e.Item is of type string

    (autoComplete.Tokens as Collection<object>)?.Add(e?.Item);

    // Item is added, but UI is not updated
    Debug.WriteLine($"Tokens count: {(autoComplete.Tokens as Collection<object>)?.Count}");
}