Pending Review
Last Updated: 16 Sep 2019 12:34 by Rajendra
Created by: Rajendra
Comments: 0
Category: UI for Xamarin
Type: Bug Report
0
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

In Development
Last Updated: 16 Sep 2019 08:06 by ADMIN
When using MvvmCross framework to load data when the View appears on the screen the ListView cannot be scrolled. It starts jumping rapidly instead.

Workaround:
Load the data in the constructor of the respective ViewModel instead inside its ViewAppearing() method.
Declined
Last Updated: 16 Sep 2019 07:49 by ADMIN
Created by: Carlos
Comments: 2
Category: Map
Type: Feature Request
1

Dear,
It would be interesting if the map control could read a shapefile or kml file and visualize the shapes, besides exporting the modifications of the map (shapes) to a shp format.

 

Best regards.

Carlos Palomino
In Development
Last Updated: 13 Sep 2019 13:34 by ADMIN
With the current implementation of the control you can enter all symbols, so provide an option to change the keyboard type. 
Approved
Last Updated: 13 Sep 2019 12:35 by ADMIN
ADMIN
Created by: Nikolay
Comments: 5
Category: ListView
Type: Bug Report
4
This can be reproduced in the SDK examples ->ListView -> Gestures -> CellSwipeEvents. 
1. Change the content of the items so that they have uneven height
2. Scroll down 
3. Delete an item by swiping
-> Expected result : The items re-arrange correctly
-> Actual result : The item is deleted but the ListView is scrolled up when the UI is updated
In Development
Last Updated: 13 Sep 2019 12:05 by ADMIN
Created by: Rajkumar
Comments: 0
Category: ListView
Type: Feature Request
0
Provide a GroupHeaderStyle which will allow users to apply background color and border styling to the group headers in a similar way as ItemStyle.
In Development
Last Updated: 13 Sep 2019 11:30 by ADMIN
ADMIN
Created by: Didi
Comments: 2
Category: Chart
Type: Bug Report
6

			
Approved
Last Updated: 13 Sep 2019 10:37 by ADMIN

Please let us know:

  • Should the color be applied to the expand indicator as well, or should there be a separate property for this
  • Should the color be applied to the checkbox as well, or should there be a separate property for this
In Development
Last Updated: 13 Sep 2019 07:46 by ADMIN
RadListView item height is not adjusted to fit the content in the cell on iOS 13 Beta.
Approved
Last Updated: 12 Sep 2019 12:27 by ADMIN
Native UWP calendar in DayView/MultiDayView Mode has a property which helps you specify height between the time lines. Please provide this option for Android and iOS too. 
Approved
Last Updated: 11 Sep 2019 15:25 by ADMIN
GroupHeaderTemplate has a default gray background applied and setting Transparent does not take any effect.
Approved
Last Updated: 11 Sep 2019 11:09 by ADMIN
When the DataGridPickerColumn ItemsSource property is bound to a collection not part of the business object used for the DataGrid, and ItemDisplayBindingPath is used, null reference exception is raised when selecting items in the picker.
Approved
Last Updated: 10 Sep 2019 20:55 by ADMIN
I would need to control when the overlay keyboard will appear, for example, hide it when the Entry gets the focus.
In Development
Last Updated: 10 Sep 2019 13:31 by ADMIN
In Development
Last Updated: 10 Sep 2019 13:31 by ADMIN
Created by: Quentin
Comments: 0
Category: Calendar & Scheduling
Type: Feature Request
8
We should consider adding a mechanism to set a template for the appointments in Xamarin.Forms so that users can add additional elements to the appointments such as images, additional info, etc.
Approved
Last Updated: 10 Sep 2019 10:17 by ADMIN
When any control (Frame, for example) with applied Margin is placed inside GroupHeaderTemplate of the ListView, the Margin value is not respected on iOS.
Completed
Last Updated: 06 Sep 2019 12:26 by ADMIN
Release R2 2019 SP2

The SelectionChanged event of the ChartSelectionBehavior is fired twice for a single selection change

Approved
Last Updated: 05 Sep 2019 08:53 by ADMIN
When you initiate a swipe gesture and the SwipeContentTemplate is shown,  changing the device orientation from portrait to landscape, does not update the ListView layout and the swiped item width is incorrect.
Approved
Last Updated: 04 Sep 2019 14:35 by Ion
On iOS there is an initial animation when the page with the SegmentedControl is loaded. Provide API to suppress that animation.
Completed
Last Updated: 04 Sep 2019 06:30 by ADMIN
System.NullReferenceException is thrown when navigating back pages with RadListView and using Xamarin.Forms 4.0 or higher. 

UPDATE:
The issue is confirmed to be in Xamarin.Forms framework. A fix is already provided. The Xamarin.Forms 4.3 version will contain the fix.
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