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The RadWebCam for WPF control currently relies on the SharpDX library to render the video feed. With 2024 Q4 we will replace SharpDX with the SkiaSharp library. This decision was taken because the SharpDX library is no longer maintained since March 2019.


Martin Ivanov
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 asked on 10 Sep 2024
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As of 2024 Q4 (November), we will deprecate the .NET 7 distribution. This decision is rooted in our dedication to align with Microsoft’s recommended framework versions so that our products leverage the latest advancements in technology, security, and performance.  

We are aligning our product with Microsoft’s lowest-supported framework versions for .NET Framework and .NET, respectively. Please refer to the following blog post: Product Update for Enhanced Performance and Security

For more information about how to upgrade your project when a new version of the Telerik UI for WPF suite is released, you can check here: Project Migration to .NET 4.6.2 and .NET 6

Martin Ivanov
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 asked on 28 May 2024
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As of 2024 Q2, we will deprecate .NET Framework 4.0, .NET Framework 4.5, and .NET Core 3.1 distributions. This decision is rooted in our dedication to align with Microsoft’s recommended framework versions so that our products leverage the latest advancements in technology, security, and performance.

We are aligning our product with Microsoft’s lowest-supported framework versions for .NET Framework and .NET, respectively. Please refer to the following blog post:

Product Update for Enhanced Performance and Security (telerik.com)

For more information about how to upgrade your project's .NET Framework version, you can check the following MSDN article:

Migration Guide to .NET Framework 4.8, 4.7, and 4.6.2 - .NET Framework | Microsoft Learn


Stenly
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 asked on 30 Jan 2024
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Can RadGlyph work with Font Awesome's Duotone font? For example, we want to render: https://fontawesome.com/icons/house?f=duotone&s=solid

I've tried various things, including:

                <Grid>
                    <!-- Secondary (back) layer -->
                    <telerik:RadGlyph
                        Font="fads"
                        FontSize="40"
                        Glyph="&#x10F015;"
                        Foreground="Red" />
                    <!-- Primary (front) layer -->
                    <telerik:RadGlyph
                        Font="fads"
                        FontSize="40"
                        Glyph="&#xF015;"
                        Foreground="Blue" />
                </Grid>

This just renders an all blue house.

Reversing the elements:

            <telerik:RadTabItem.Content>
                <Grid>
                    <!-- Primary (front) layer -->
                    <telerik:RadGlyph
                        Font="fads"
                        FontSize="40"
                        Glyph="&#xF015;"
                        Foreground="Blue" />
                    <!-- Secondary (back) layer -->
                    <telerik:RadGlyph
                        Font="fads"
                        FontSize="40"
                        Glyph="&#x10F015;"
                        Foreground="Red" />
                </Grid>

I'm using the same technique I use to register regular Font Awesome fonts and have verified the codepoints exist:

        var solidDuotoneFontFilePath = Path.Combine(directory, "Resources/Fonts", "Font Awesome 7 Duotone-Solid-900.otf");
        var solidDuotoneFontUri = new Uri(solidDuotoneFontFilePath, UriKind.Absolute);
        var solidDuotoneFontFamily = new FontFamily(solidDuotoneFontUri, "./#Font Awesome 7 Duotone Solid");
        RadGlyph.RegisterFont(solidDuotoneFontFamily, "fads");

        bool HasChar(FontFamily fam, int codePoint)
        {
            var tf = new Typeface(fam, FontStyles.Normal, FontWeights.Normal, FontStretches.Normal);
            if (!tf.TryGetGlyphTypeface(out var gtf)) return false;
            return gtf.CharacterToGlyphMap.ContainsKey(codePoint);
        }

        Debug.WriteLine($"Primary F015 present: {HasChar(solidDuotoneFontFamily, 0xF015)}");
        Debug.WriteLine($"Secondary 10F015 present: {HasChar(solidDuotoneFontFamily, 0x10F015)}");

Neil N
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 asked on 28 Aug 2025
2 answers
7 views

I'm looking to load/save the appointments to a local file rather than a database.

I found a forum post from 2015 which seems a bit out of date.

Is there any facility for this and if not what is the suggested route? I don't want to ship a database source within my application.

Many thanks

Rob
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Iron
 answered on 25 Aug 2025
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There appears to be a bug in the column filter popup. Whenever I change one filter operator, the second filter operator changes to the same value. So I can't do something like GreaterThan X and LessThan Y.

See a video here: https://share.cleanshot.com/6Bn9FwlJ

Shawn
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 asked on 20 Aug 2025
1 answer
9 views

Hi,

I have this code, thats not working like this.

Because of the DataContext, the DocumentSource wont work, because it needs obviously a different DataContext.
But I need this DataContext for the ContextMenu to work.

Is there a way I can have both? A working context menu and also bind the DocumentSource?

Greetings
Benedikt

        <telerik:RadPdfViewerToolBar 
            Grid.Row="1"
            x:Name="pdfViewerToolBarZeichnungen" 
            Margin="0 5 0 0"
            RadPdfViewer="{Binding ElementName=pdfViewerZeichnungen}" 
            HasSaveButton="{DynamicResource SonderRechtPDFsSpeichernErlaubt}" 
            HasSignatureButton="False" 
            HasPercentComboBox="False" 
            HasPrintButton="{DynamicResource SonderRechtPDFsSpeichernErlaubt}" 
            />
        <telerik:RadPdfViewer 
            Grid.Row="2" 
            x:Name="pdfViewerZeichnungen" 
            DocumentSource="{Binding SelDatei.FilePath, Converter={StaticResource PdfDocumentSourceValueConverter}}"
            DataContext="{Binding CommandDescriptors, ElementName=pdfViewerZeichnungen}" 
            telerik:RadPdfViewerAttachedComponents.RegisterFindDialog="True" 
            telerik:RadPdfViewerAttachedComponents.RegisterContextMenu="True"
            Mode="TextSelection"
            >


Stenly
Telerik team
 answered on 18 Aug 2025
1 answer
11 views
Hello!

I'm trying to use DragVisualProvider on my ListBox:
            <telerik:RadListBox.DragDropBehavior>
                <telerik:ListBoxDragDropBehavior AllowReorder="False"/>
            </telerik:RadListBox.DragDropBehavior>

            <telerik:RadListBox.DragVisualProvider>
                <telerik:ScreenshotDragVisualProvider />
            </telerik:RadListBox.DragVisualProvider>          

            <telerik:RadListBox.ItemsPanel>
                <ItemsPanelTemplate>
                    <telerik:RadWrapPanel HorizontalAlignment="Stretch"/>
                </ItemsPanelTemplate>
            </telerik:RadListBox.ItemsPanel>

However, the "drop line" (the blue vertical line that indicates where the item will be dropped) is not sizing correctly. It appears to be much larger than the items themselves, as you can see in the attached image.

How can I fix this so that the drop line fits the size of the other images? Am I missing a property or a specific configuration?

Any help would be greatly appreciated. Thanks!


Stenly
Telerik team
 answered on 13 Aug 2025
1 answer
14 views

I use RadRichTextBox (WPF) to edit HTML documents.

These contain images with annotations.

It works as expected (except for the context menu popping up when I mark an image) and I can position the images according to my needs.

See Before.png where the red arrow points to something in the image.

When I save the HTML and load it into the RadRichTextBox again the image positioning is totally gone. See After.png

Am I missing something or does the HtmlDataProvider simply not work as expected?

Dimitar
Telerik team
 answered on 08 Aug 2025
1 answer
13 views

Is this the best place to report bugs?

This is with 2024.4.1213.462.

To duplicate the issue:

  1. With VS 2022, create a WPF (.NET Framework) application,
  2. Delete MainWindow.xaml and MainWindow.xaml.cs
  3. Unzip the attached file, place MainWindow.xaml and MainWindow.xaml.cs from the zip where the old files were or use the pasted text below
  4. Build and run the application
  5. Put focus on a cell in a row in the grid and type a letter

Expect the following exception to be raised

NameValueType
$exception{"Object reference not set to an instance of an object."}System.NullReferenceException

at Telerik.Windows.Controls.DateTimePickerGridViewEditor.Telerik.Windows.Controls.GridView.IGridViewEditor.SetText(String text) in Telerik.Windows.Controls\DateTimePickerGridViewEditor.cs:line 56

 

In case the zip doesn't work:

MainWindow.xaml.cs:

namespace WpfApp14
{
    using System;
    using System.ComponentModel;
    using System.Windows;
    using System.Collections.ObjectModel;

    public sealed class GridValueViewModel : INotifyPropertyChanged
    {
        private string someValue = string.Empty;

        public GridValueViewModel(string someValue)
        {
            this.SomeValue = someValue;
        }

        public event PropertyChangedEventHandler PropertyChanged;

        public string SomeValue
        {
            get
            {
                return this.someValue;
            }

            set
            {
                value = value ?? string.Empty;
                if (this.SomeValue != value)
                {
                    this.someValue = value;
                    this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(this.SomeValue)));
                }
            }
        }

        public DateTime? DateValue
        {
            get
            {
                if (DateTime.TryParse(this.SomeValue, out var value))
                {
                    return value;
                }

                return null;
            }

            set
            {
                if (value == null)
                {
                    this.SomeValue = string.Empty;
                    return;
                }

                this.SomeValue = value.ToString();
            }
        }

        public ObservableCollection<string> SomeValueItems { get; } = new ObservableCollection<string>(
            new[]
            {
                "cat",
                "dog",
                "bird"
            });
        
    }

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            this.InitializeComponent();
            this.DataContext = this;
        }

        public ObservableCollection<GridValueViewModel> Values { get; } = new ObservableCollection<GridValueViewModel>(
            new[]
            {
                new GridValueViewModel("cat"),
                new GridValueViewModel("dog"),
                new GridValueViewModel("bird")
            });
    }
}

 

MainWindow.xaml:

<Window x:Class="WpfApp14.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <telerik:RadGridView
        AutoGenerateColumns="False"
        ItemsSource="{Binding Values, Mode=OneWay}">
        <telerik:RadGridView.Columns>
            <telerik:GridViewDataColumn
                Header="Column 1">
                <telerik:GridViewDataColumn.CellTemplate>
                    <DataTemplate>
                        <Label
                            Content="{Binding SomeValue}" />
                    </DataTemplate>
                </telerik:GridViewDataColumn.CellTemplate>
                <telerik:GridViewDataColumn.CellEditTemplate>
                    <DataTemplate>
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition
                                    Width="*" />
                            </Grid.ColumnDefinitions>
                            <TextBox
                                Grid.Column="0"
                                Text="{Binding SomeValue, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"
                                Visibility="Collapsed" />
                            <telerik:RadComboBox
                                Grid.Column="0"
                                HorizontalAlignment="Stretch"
                                IsEditable="False"
                                ItemsSource="{Binding SomeValueItems}"
                                SelectedItem="{Binding SomeValue}" />
                            <telerik:RadDateTimePicker
                                Grid.Column="0"
                                HorizontalAlignment="Stretch"
                                InputMode="DatePicker"
                                DateTimeWatermarkContent="{x:Null}"
                                SelectedValue="{Binding DateValue, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"
                                Visibility="Collapsed" />
                        </Grid>
                    </DataTemplate>
                </telerik:GridViewDataColumn.CellEditTemplate>
            </telerik:GridViewDataColumn>
        </telerik:RadGridView.Columns>
    </telerik:RadGridView>
</Window>

Stenly
Telerik team
 answered on 07 Aug 2025
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