Questions on UI for WPF Forum

0 answers

56 views

Simple Word Document Crashes WPF RadRichTextBox

I am using Telerik UI for WPF 2024 Q4\Binaries.NoXaml\WPF80\Telerik.Windows.Documents.Flow.FormatProviders.Doc.dll (version 2024.4.1106.60) on Windows 11 Pro (24H2). The program is developed using VS 2022.

It simply tries to load and display the attached DOCX file and the component crashes during layout with a null reference exception.

         using var instream = File.OpenRead(path);

         var openXmlRadDocProvider =
            new Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider();

         var raddoc = openXmlRadDocProvider.Import(instream);
         RadRtb.Document = raddoc;

Word displays this perfectly. Trying to determine if this is a Telerik bug or a "me" problem.

Stenly replied and said he was unable to reproduce using 2025.2.707. I am able to reproduce the crash with that version. I have attached my project in case I'm doing something wrong in code.

Thanks.

-John Reilly.

RichTextBox

updated question on 16 Jul 2025

1 answer

101 views

Setting a font size for the entire application

I am using the Material Theme, here's my app.xaml code

<Application x:Class="Desktop_Application.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Application.Resources>
        
        <ResourceDictionary>
            <!-- Global default font size -->
            <Style TargetType="{x:Type Control}">
                <Setter Property="FontSize" Value="8"/>
            </Style>
            
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Material;component/Themes/System.Windows.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Material;component/Themes/Telerik.Windows.Controls.Chart.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Material;component/Themes/Telerik.Windows.Controls.Data.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Material;component/Themes/Telerik.Windows.Controls.FixedDocumentViewers.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Material;component/Themes/Telerik.Windows.Controls.GridView.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Material;component/Themes/Telerik.Windows.Controls.ImageEditor.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Material;component/Themes/Telerik.Windows.Controls.Input.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Material;component/Themes/Telerik.Windows.Controls.Navigation.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Material;component/Themes/Telerik.Windows.Controls.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

However, the application does not reflect the new font size, is there a way to do it?

General Discussions

answered on 16 Jul 2025

0 answers

47 views

Update problem with some telerik packages

I'm using central package management, where my Directory.Build.props has folliwing entries:

<ItemGroup>
    <PackageVersion Include="Telerik.UI.for.Wpf.NetCore.Xaml" Version="2024.1.423" />
    <PackageVersion Include="Telerik.Windows.Controls.Data.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Controls.DataVisualization.for.Wpf.Xaml" Version="2024.3.924" />
    <PackageVersion Include="Telerik.Windows.Controls.Diagrams.Extensions.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Controls.Diagrams.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Controls.Diagrams.Ribbon.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Controls.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Controls.GridView.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Controls.Input.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Controls.Navigation.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Controls.RibbonView.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Data.for.Wpf.Xaml" Version="2025.2.707" />
    <PackageVersion Include="Telerik.Windows.Diagrams.Core.for.Wpf.Xaml" Version="2025.2.707" />
</ItemGroup>

As you can maybe see,

Telerik.UI.for.Wpf.NetCore.Xaml has 2024.1.423
Telerik.Windows.Controls.DataVisualization.for.Wpf has 2024.3.924

when using the manage nuget packages dialog from within visual studio it does not report that any updates are necessary, but the build tells me that (of course) there is a version mismatch,

The dialog even tells me that there is a newer version:

What could be the problem that it doesn't get updated or is not found to require an update?

General Discussions

updated question on 15 Jul 2025

1 answer

50 views

How to set custome date display format in WPF

I using the <telerik:RadDatePicker>

DisplayFormat = (Long or short) only there I need a customer format how we archive.

Example : 1 July 2025, 1 JUL 2025

DatePicker

DateTimePicker

GridView

answered on 14 Jul 2025

0 answers

40 views

RadMaskedNumericInput does not respect click location when value is 0

I have a RadMaskedNumericInput as follows:

<telerik:RadMaskedNumericInput Grid.Row="0" Grid.Column="1" Width="55"
                       Mask=""
                       FormatString="n2"
                       Value="{Binding TotalFeedVolume}"
                       IsClearButtonVisible="False"
/>

When I click on the left of the initial zero, it moves my cursor right in front of the decimal point. This is a bit frustrating, as I couldn't, for example, just easily make it "10" with one keystroke. Any way to fix this?

MaskedInput (Numeric, DateTime, Text, Currency)

asked on 09 Jul 2025

1 answer

32 views

Change colors of RadVirtualKeyboardWindow's close button

Hello,

I need to change the color of the RadVirtualKeyboardWindow's close button. At the moment it is not viewable very good. I use Material style around in my application, but it seems that it does not completly fit my needs.

I tried to change the button's beahviour like this:

<Style TargetType="telerik:RadVirtualKeyboardWindow">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="telerik:RadVirtualKeyboardWindow">
                <Grid>
                    <!-- Fensterinhalt -->
                    <Border Background="{TemplateBinding Background}">
                        <ContentPresenter />
                    </Border>

                    <!-- Schließen-Button -->
                    <Button x:Name="PART_CloseButton"
                            Width="24" Height="24"
                            HorizontalAlignment="Right"
                            VerticalAlignment="Top"
                            Margin="5"
                            Background="DarkRed"
                            Foreground="White"
                            BorderBrush="Transparent"
                            Content="✕"
                            FontWeight="Bold"
                            Cursor="Hand"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

But that actually lead to a very long button and could not change that either:

What can I try next?

Thanks and best regards,

Ferdinand

VirtualKeyboard

Window

answered on 09 Jul 2025

0 answers

33 views

Print pdf with RadPdfViewer - issue with font

Hello,
I'm trying to merge several PDF files into one and then print them.
I am using version 2022.2.621.

My code looks like this

       public static void Print(List<string> files)
       {
           using (MemoryStream stream = new MemoryStream())
           {
               using (PdfStreamWriter fileWriter = new PdfStreamWriter(stream, leaveStreamOpen: true))
               {
                   foreach (string path in files)
                   {
                       using (PdfFileSource fileSource = new PdfFileSource(new MemoryStream(File.ReadAllBytes(path))))
                       {
                           for (int i = 0; i < fileSource.Pages.Length; i++)
                           {
                               PdfPageSource sourcePage = fileSource.Pages[i];
                               using (PdfPageStreamWriter resultPage = fileWriter.BeginPage(sourcePage.Size))
                               {
                                   // set content                      
                                   resultPage.WriteContent(sourcePage);
                               }
                           }
                       }
                   }
               }

               var pdfViewer = new RadPdfViewer();
               PdfFormatProvider provider = new PdfFormatProvider();
               RadFixedDocument document = provider.Import(stream);
               pdfViewer.Document = document;
               var printdlg = new PrintDialog();
               printdlg.UserPageRangeEnabled = true;
               printdlg.SelectedPagesEnabled = true;
               if (printdlg.ShowDialog() == true)
               {
                   var printSettings = new PrintSettings(Path.GetFileNameWithoutExtension("file"), false);
                   pdfViewer.Print(printdlg, printSettings);
               }
           }
       }

My problem is, that befor print pdf looks like this

But after print

What I discoverd, that file befor print has more fonts then after.
Befor:

After

How can I handle this problem?

PDFViewer

asked on 08 Jul 2025

0 answers

49 views

Removing Outside Grid Border

I've been trying to remove the thin white border line with no luck, Any help?

                            <telerik:RadGridView
                                Margin="0,5,0,0" AutoGenerateColumns="False" BorderThickness="0" BorderBrush="{StaticResource LaGrey12}"
                                ColumnBackground="{StaticResource LaGrey12}"
                                GridLinesVisibility="None" IsReadOnly="True"
                                ItemsSource="{Binding ContactActivityNote.ContactActivityParticipants}"
                                ShowColumnHeaders="False">
                                <telerik:RadGridView.Columns>
                                    <telerik:GridViewDataColumn
                                        Width="Auto"
                                        DataMemberBinding="{Binding ParticipationTypeId}"
                                        Header="Type" />
                                    <telerik:GridViewDataColumn
                                        Width="*"
                                        DataMemberBinding="{Binding AddressedTo}"
                                        Header="Addressed To" />
                                </telerik:RadGridView.Columns>
                            </telerik:RadGridView>

GridView

asked on 07 Jul 2025

0 answers

18 views

RadTimeline extended selection

Hi,

Is it possible to get the start and end of the selected time on mouse selection event?

Regards,

kk

TimeLine

asked on 04 Jul 2025

0 answers

41 views

RadGridView - Constrain Autosizing of Columns and Rows

I have a RadGridview displaying data from a datatable using autogenerated columns. I have EnableColumnVirtualization="True" and EnableRowVirtualization="True". When I scroll through the grid, columns and rows are autosizing to display data and everything looks good for the most part.

However, I have some columns that can be excessively wide, easily twice the width of the screen. The same for rows, I occasionally have a cell where the row is excessively high.

How can I set a max width for column and row to prevent excessively wide columns or tall rows? I tried setting MaxHeight and MaxWidth, but that also constrains the user to those settings if they do intentionally want to increase those values.

GridView

asked on 30 Jun 2025