In Xamarin Forms there is a serious need for a Rich Text Editor control that would allow you to do this such as highlight text, apply fonts, styles etc. I think a tool like this is in great demand among Xamarin developers. Currently there are some Open source controls that have implemented these features however they have not been maintained and cannot be relied on for enterprise solutions
Add controls to selecting dates/times that also support null or blank values. Currently the DatePicker control that is provided as part of Xamarin Forms doesn't allow for a null or blank date. Provide the ability to select date and time in single UI.
When you have a page with RadCalendar and DayViewSettings properties are data-bound, navigating back in Prism raises a "Cannot destroy page" exception.
xamarin forms on wpf is now official, https://docs.microsoft.com/en-us/xamarin/xamarin-forms/platform/wpf we need to support telerik on there aswell..
It would be great to have controls to enter an IP Address and a MAC address.
IP Address in the form of: ###.###.###.### where the # ranges from 0 to 255 for each octet.
MAC address in the form of: ##-##-##-##-##-## where the # ranges in hex from 00 to FF.
Hello,
RadPopup control causes memory leaks on iOS.
Here is the repro project https://github.com/VitalyKnyazev/RadPopupLeak
Thanks
Vitaly
The "Scrolled" event is such a essential feature.
For example, i made a floating searchbar with transparent frame, and a RadListView with HeaderTemplate that is longer than a screen of the device, i would like to detect whether the listview has scrolled for more than 10px vertically. If yes, set the background of the frame of the searchbar to my desired color.Xamarin.Forms, collectionview, listview, and scrollview has Scrolled event, but why RadListView does not? Using ItemAppearing event is just avoiding the problem instead of solving it. It will not be able to fulfill the criteria as the any item does not even enter the screen yet before the required task need to be done.
When you have declared a custom GroupHeaderTemplate and the total height of the elements within it is bigger than the pre-allocated one - the content is visualized on top of the group's items.
We have yet to upgrade our mobile app to Xamarin Forms 4.x and the latest Telerik releases due to a hard crash in Android when we leave a page containing a Telerik ListView control.
The exception seems to mirror what is discussed here: https://www.telerik.com/forums/null-ref-error-iorderedtraversalcontroller-updatetraversalorder
Here is what we are seeing... what is the latest on addressing this error? We need to upgrade from Xamarin Forms 3.6.x soon.
10-16 15:00:06.082 I/MonoDroid( 4686): UNHANDLED EXCEPTION:
10-16 15:00:06.084 I/MonoDroid( 4686): System.NullReferenceException: Object reference not set to an instance of an object.
10-16 15:00:06.084 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.PageRenderer.Xamarin.Forms.Platform.Android.IOrderedTraversalController.UpdateTraversalOrder () [0x000a4] in D:\a\1\s\Xamarin.Forms.Platform.Android\Renderers\PageRenderer.cs:186
10-16 15:00:06.084 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].UpdateParentPageTraversalOrder () [0x00025] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:402
10-16 15:00:06.084 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].OnElementPropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x00116] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:366
10-16 15:00:06.084 I/MonoDroid( 4686): at (wrapper delegate-invoke) <Module>.invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)
10-16 15:00:06.084 I/MonoDroid( 4686): at Xamarin.Forms.BindableObject.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:211
10-16 15:00:06.084 I/MonoDroid( 4686): at Xamarin.Forms.Element.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:359
10-16 15:00:06.084 I/MonoDroid( 4686): at Xamarin.Forms.Element.set_Parent (Xamarin.Forms.Element value) [0x000e9] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:216
10-16 15:00:06.084 I/MonoDroid( 4686): at Xamarin.Forms.Element.OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:341
10-16 15:00:06.084 I/MonoDroid( 4686): at Xamarin.Forms.ViewCell.set_View (Xamarin.Forms.View value) [0x00019] in D:\a\1\s\Xamarin.Forms.Core\Cells\ViewCell.cs:25
10-16 15:00:06.084 I/MonoDroid( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.ListView.CellContainerBase.Dispose (System.Boolean disposing) [0x00034] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.084 I/MonoDroid( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.084 I/MonoDroid( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.FormsListViewDataSourceAdapterBase.ClearCachedViews () [0x00023] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.RadListViewDataSourceAdapter.ClearCachedViews () [0x00000] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.RadListViewDataSourceAdapter.Dispose (System.Boolean disposing) [0x00003] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.ListViewRenderer.OnElementDetached (Telerik.XamarinForms.DataControls.RadListView oldElement) [0x00042] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Telerik.XamarinForms.Common.Android.AndroidRendererBase`2[S,T].Dispose (System.Boolean disposing) [0x0001f] in <14fbe24a55144e3caaf308ca594f4d5e>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311
10-16 15:00:06.085 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.Platform+DefaultRenderer.Dispose (System.Boolean disposing) [0x0000a] in D:\a\1\s\Xamarin.Forms.Platform.Android\Platform.cs:1290
10-16 15:00:06.085 I/MonoDroid( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311
10-16 15:00:06.085 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.Platform+DefaultRenderer.Dispose (System.Boolean disposing) [0x0000a] in D:\a\1\s\Xamarin.Forms.Platform.Android\Platform.cs:1290
10-16 15:00:06.085 I/MonoDroid( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311
10-16 15:00:06.085 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.PageRenderer.Dispose (System.Boolean disposing) [0x00024] in D:\a\1\s\Xamarin.Forms.Platform.Android\Renderers\PageRenderer.cs:53
10-16 15:00:06.085 I/MonoDroid( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at Xamarin.Forms.Platform.Android.AppCompat.FragmentContainer.OnDestroyView () [0x0003c] in D:\a\1\s\Xamarin.Forms.Platform.Android\AppCompat\FragmentContainer.cs:80
10-16 15:00:06.085 I/MonoDroid( 4686): at Android.Support.V4.App.Fragment.n_OnDestroyView (System.IntPtr jnienv, System.IntPtr native__this) [0x00008] in <fefee6c2c695459088a9df092723e052>:0
10-16 15:00:06.085 I/MonoDroid( 4686): at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.97(intptr,intptr)
10-16 15:00:06.088 E/AppCenterCrashes( 4686): Unhandled Exception from source=AndroidEnvironment
10-16 15:00:06.088 E/AppCenterCrashes( 4686): System.NullReferenceException: Object reference not set to an instance of an object.
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Platform.Android.PageRenderer.Xamarin.Forms.Platform.Android.IOrderedTraversalController.UpdateTraversalOrder () [0x000a4] in D:\a\1\s\Xamarin.Forms.Platform.Android\Renderers\PageRenderer.cs:186
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].UpdateParentPageTraversalOrder () [0x00025] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:402
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].OnElementPropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x00116] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:366
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at (wrapper delegate-invoke) <Module>.invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.BindableObject.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:211
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Element.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:359
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Element.set_Parent (Xamarin.Forms.Element value) [0x000e9] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:216
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Element.OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:341
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.ViewCell.set_View (Xamarin.Forms.View value) [0x00019] in D:\a\1\s\Xamarin.Forms.Core\Cells\ViewCell.cs:25
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.ListView.CellContainerBase.Dispose (System.Boolean disposing) [0x00034] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.FormsListViewDataSourceAdapterBase.ClearCachedViews () [0x00023] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.RadListViewDataSourceAdapter.ClearCachedViews () [0x00000] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.RadListViewDataSourceAdapter.Dispose (System.Boolean disposing) [0x00003] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Telerik.XamarinForms.DataControlsRenderer.Android.ListViewRenderer.OnElementDetached (Telerik.XamarinForms.DataControls.RadListView oldElement) [0x00042] in <12ab8aad1d0a41af83f0de07840de122>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Telerik.XamarinForms.Common.Android.AndroidRendererBase`2[S,T].Dispose (System.Boolean disposing) [0x0001f] in <14fbe24a55144e3caaf308ca594f4d5e>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Platform.Android.Platform+DefaultRenderer.Dispose (System.Boolean disposing) [0x0000a] in D:\a\1\s\Xamarin.Forms.Platform.Android\Platform.cs:1290
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Platform.Android.Platform+DefaultRenderer.Dispose (System.Boolean disposing) [0x0000a] in D:\a\1\s\Xamarin.Forms.Platform.Android\Platform.cs:1290
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311
10-16 15:00:06.088 E/AppCenterCrashes( 4686): at Xamarin.Forms.Platform.Android.PageRenderer.Dispose (System.Boolean disposing) [0x00024] in D:\a\1\s\Xamarin.Forms.Platform.Android\
the following exceptions occur when upgrading to Xamarin.Forms v 4.0:
System.NotSupportedException: Unable to activate instance of type Telerik.XamarinForms.DataControlsRenderer.Android.ListView.TemplateCellContainer
System.NullReferenceException: Object reference not set to an instance of an object
at Telerik.XamarinForms.InputRenderer.iOS.SegmentedControlRenderer.OnElementDetached
Hello,
Another important control is missing from your Control Suit. That is Rich Text Box control, same like one available from SyncFusion: https://www.syncfusion.com/xamarin-ui-controls/xamarin-richtexteditor
Please give us a rich text editor control like that. Thank you.
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