Last Updated: 30 May 2023 11:03 by Mehmet

Exception occurs when there are no items in the collection and load on demand mode is automatic: 

public ViewModel()
    this.Source = new ObservableCollection<string>();
    //for (int i = 0; i < 14; i++)
    //    this.Source.Add(string.Format("Item {0}", i));
    this.LoadItemsCommand = new Command(this.LoadItemsCommandExecute);

Last Updated: 30 May 2023 00:00 by n/a
Occasionally the DataGrid horizontal scrolling does not work properly after changing its ItemsSource.  Still, tapping on any item, make it possible to scroll again.
Last Updated: 25 May 2023 08:30 by Sam

when using the justify toolbar item it does not justify the text. 

Last Updated: 02 May 2023 14:33 by Mauricio
Created by: Mauricio
Comments: 0
Category: MaskedInput
Type: Bug Report

Watermark text is not displayed on Android. 


set the WatermarkText property in code-behind with some delay:

Device.BeginInvokeOnMainThread(() =>
    mask.WatermarkText = "enter e-mail here";

Last Updated: 20 Apr 2023 10:27 by ADMIN
LoadOnDemandContext.HideLoadOnDemandLoadingIndicator() needs to be in an async method, otherwise it will keep the indicator visible forever
Last Updated: 19 Apr 2023 10:40 by ADMIN
When having the following scenario: 

Bound SelectedItem = A
Bound Items to the ListPicker.ItemsSource= {B, C, D}
Open picker.
Item B is highlighted.
Do not scroll or tap anything, just press OK

Expected -> SelectedItem = B
Actual -> SelectedItem remains A.

Last Updated: 19 Apr 2023 09:02 by Edoardo

When adding a RadCalendar with Day ViewMode in a TabView and switching tabs, null ref exception is thrown. 

Workaround: Set TabView.IsContentPreserved to True 

Last Updated: 05 Apr 2023 14:45 by JJ
Created by: JJ
Comments: 0
Category: TreeView
Type: Feature Request
 implement a cell Swipe-like behavior as exists in the ListView
Last Updated: 05 Apr 2023 13:58 by JJ
Created by: Nicola
Comments: 1
Category: UI for Xamarin
Type: Feature Request
The ability to drag and drop items within the same TreeView as well as to another TreeView instance.
Last Updated: 05 Apr 2023 08:10 by Nethra

System.ArgumentOutOfRangeException: Count cannot be less than zero.
Parameter name: count
   at System.String.Remove(Int32 startIndex, Int32 count)
   at Telerik.XamarinForms.Input.MaskedInput.MaskParser.ConstructCandidateTextForMaskTypeRegex(String oldText, Int32 startIndex, Int32 selectionLength, String enteredText, Boolean userDeletes, Int32& insertIndex)
   at Telerik.XamarinForms.InputRenderer.UWP.MaskedInputFormsTextBox.CreateCandidateText(KeyRoutedEventArgs e, Int32& actualInsertIndex)

The issue can be reproduced in SDK Browser application MaskedInput/Features/Regex Mask example IP and email masks when enter symbol like ., @, etc.



Last Updated: 29 Mar 2023 18:01 by Rodney
Created by: Rodney
Comments: 0
Category: DataGrid
Type: Feature Request

Hi Team,

Currently, you have ScrollItemIntoView support. However, that does not work unless you have rows and a reference to the data item.

I need an explicit mechanism to pick a specific X/Y cell position, or at least a column index, that can be scrolled to so that I can have horizontal scrolling capability.

For example, imagine a DataGrid that has only one row, but a 100 columns, I would like to be able to do this:

// Option 1 - Use the ItemsSource column reference
var dataTableColumn = this.myDataTable.Columns[50];

// Option 2 - Better!  
// This supports any possible data source type
var telerikColumn = this.MyDataGrid.Columns[50];

// Option 3 - Ideal
// Useful for every possible occasion
var x = 5;
var y = 12;
this.MyDataGrid.ScrollIntoView(x, y);


Last Updated: 28 Mar 2023 08:27 by James

When having the following code on a button click 

private void Button_Clicked(object sender, System.EventArgs e)
       this.chart.Zoom = new Size();

The chart zoom is reset first time, but when zooming again and pressing the button, the zoom level does not reset. You have to pan the chart, then zoom reset works. 

This code resets the zoom:

private void OnResetZoomClicked(object sender, EventArgs e)
	this.chart.Zoom = new Size(1, 1); // This line is added as a workaround to reset the Zoom level
	this.chart.Zoom = new Size();



Last Updated: 21 Mar 2023 17:27 by Rishik

When the RadShadow is added inside the Xamarin ListView cell, and then when scrolling through the ListView, the content in the cell disappear.

Use Telerik Xamarin RadListView control instead. 

Last Updated: 21 Mar 2023 12:55 by ADMIN
Created by: Lance | Manager Technical Support
Comments: 2
Category: Gauges
Type: Bug Report
Using a DynamicResource to set the GaugeRange Color property does not work:

<!-- does not work -->
<gauges:GaugeRange Color="{DynamicResource GrayBackgroundColor}" ... />

Using a StaticResource works as expected:

<!-- works -->
<gauges:GaugeRange Color="{StaticResource GrayBackgroundColor}" ... />

Using DynamicResource for Indicator Fill works as expected.
Last Updated: 09 Mar 2023 08:25 by Peter
Null Reference Exception is thrown when the ListView is initially grouped and navigating back to page where is the ListView and new RangeCollection is assigned to the control.
Last Updated: 03 Mar 2023 14:07 by David
Some cultures have Monday as a first day of week. When device language and culture change, the RadCalendar first day of week remains Sunday, not Monday. 
There is an inconsistence in the behavior. Android Calendar changes the day to Monday. iOS not. 
Last Updated: 03 Mar 2023 09:37 by Brandon

Having a ComboBox inside the RadListView ItemTemplate. 

Binding the ComboBox SelectedItems. 
On UWP when PropertyChanged is called on an item in the ListView, it fires the ComboBox SelectedItems CollectionChanged with action Remove, which is wrong behavior. And as a result the ComboBox SelectedItems collection is cleared. 

On Android an iOS works as expected, the ComboBox SelectedItems collection is not cleared. 

Last Updated: 02 Mar 2023 14:27 by James
Created by: James
Comments: 0
Category: ListView
Type: Bug Report
when using the ItemHold event and command. The event is not fired and the command is not executed
Last Updated: 27 Feb 2023 16:43 by ADMIN
Created by: Tom
Comments: 18
Category: ImageEditor
Type: Feature Request
The image editor is a great start, but missing a critical feature - image drawing / annotation. The ability to draw lines, shapes or text onto an image. Should allow this to be done when pinch / zoom is in progress. Items drawn should be amendable until saved. Opportunity to retrieve the annotation only data separately to the image so you can preserve the original.
Last Updated: 24 Feb 2023 10:24 by Brandon

when TabView is inside Stack and item is added dynamically to the RadTabView, the content of this first item does not layout as expected. 

    <Button Text="Add" Clicked="OnAddClicked" />
    <Button Text="Remove" Clicked="OnRemoveClicked" Margin="0,5,0,5" />
    <Button Text="Clear" Clicked="OnClearClicked" />
    <telerikPrimitives:RadTabView BackgroundColor="Red" x:Name="tabView" AutomationId="tabView"/>





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