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  • Create custom shapes in the RadDiagram with MVVM - The forum thread elaborates on how to create custom shapes in the RadDiagram following an MVVM approach.
  • Populate the RadDiagramToolbox with custom business data - In this forum thread you can find a sample solution and guidelines on how to populate the RadDiagramToolbox with custom business data and based on the data type drop different objects on the diagramming surface. The attached solution also demonstrates an approach for providing custom information in a SettingsPane tab.
  • Unfocused state for the selected GridViewRow - With Q2 2012 we have introduced a new Unfocused state for the selected GridViewRow. It will be shown when the GridView is out of focus. If you want to revert to the previous behavior you can check this help article.
RadPivotGrid: RadRichTextBox:
  • Guidelines for Printing with RadDocument - As RadDocument is sometimes used independently of RadRichTextBox to layout content and export it, this article explains the basics of creating a document programmatically.
Telerik team
 answered on 23 Feb 2018
1 answer

I have a RadDocking element in my xaml. I need to add one main button that opens and closes the main menu above the RadDocking element.

The problem is, the RadPane-s that open inside the RadDocking element would go below the button and the title of a given RadPane is hidden.

I want my main button to be above the RadDocking element, but the header/title of all the panes should be at all time visible and not hidden by the button.

I was wondering, can there be some constrained area inside RadDocking tag where RadPanes would not go or cover, so I can place my button above the RadDocking in that area?

Seems a bit non-sense but there has to be a way.

Should I use conditional docking? But how would that work, mark each new pane with a tag and then choose HeaderTemplate with HeaderTemplateSelector whether to add or not, space to the left in the RadPane header?


I maybe need some polygon-like container element that supports direct content. I need to be able to dock on right and below the button but panes should not go below the button and hide their title.

Check attached image.

Here is my modified ControlTemplate:

<ControlTemplate x:Key="RadDockingControlTemplate" TargetType="tk:RadDocking">
                <Grid x:Name="Root">
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="*"/>

                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="*"/>
                    <Button Width="80" Height="36"  Content="Text" Grid.Column="0" Grid.Row="0"/>
                        Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        Padding="{TemplateBinding Padding}">
                        <tk:RadDockPanel x:Name="RootDockPanel">
                            <dock:AutoHideArea x:Name="LeftAutoHide" tk:RadDockPanel.Dock="Left" TabStripPlacement="Left" BackgroundVisibility="Collapsed" TabOrientation="Vertical"/>
                            <dock:AutoHideArea x:Name="RightAutoHide" tk:RadDockPanel.Dock="Right" TabStripPlacement="Right" BackgroundVisibility="Collapsed" TabOrientation="Vertical"/>
                            <dock:AutoHideArea x:Name="TopAutoHide" tk:RadDockPanel.Dock="Top" TabStripPlacement="Top" BackgroundVisibility="Collapsed" TabOrientation="Horizontal"/>
                            <dock:AutoHideArea x:Name="BottomAutoHide" tk:RadDockPanel.Dock="Bottom" TabStripPlacement="Bottom" BackgroundVisibility="Collapsed" TabOrientation="Horizontal"/>
                            <tk:DockingPanel x:Name="ContentDockPanel" Margin="0">
                                <dock:DocumentHost x:Name="DocumentHost" IsTabStop="{TemplateBinding IsTabStop}"/>


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 updated question on 10 May 2021
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How to remove the visibility of lines in specific nodes of a RadTreeView(not root)
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 updated question on 10 May 2021
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Is it possible to connect the dots on the attached image?

I have a chart where the x-axis is time span and the y-axis is double.

On the x-axis I want to show every hour between the stating time span 0h 0 min to the ending time span 23h 59min.

So what I have done is to create a list with all y-axis datapoints and all steps of the x-axis.

Where there are no datapoints on the y-axis I set the double to NaN.

So what I want is to draw a line between the values that are not set to NaN. Or ofcourse if there is another way to resolve this.


Items = new List<CurveItPlotInfo>(); for (int i = 0; i < 23; i++) { if (vats.Any(x => x.Time.Hours == i)) { foreach (var item in vats.Where(x => x.Time.Hours == i)) { Items.Add(new CurveItPlotInfo { TimeSpanValue = item.Time, Value = ConvertToDouble(item.Value), }); } } else if (i == 23) { Items.Add(new CurveItPlotInfo { TimeSpanValue = TimeSpan.FromMinutes(1439), Value = Double.NaN, }); } else { Items.Add(new CurveItPlotInfo { TimeSpanValue = TimeSpan.FromHours(i), Value = Double.NaN, }); ; } }


public class CurveItPlotInfo : ViewModelBase

        private double value;
        private TimeSpan timeSpanValue;

        public double Value
            get { return value; }
            set { SetProperty(ref this.value, value); }

        public TimeSpan TimeSpanValue { get => timeSpanValue; set { SetProperty(ref timeSpanValue, value); } }



<telerik:RadCartesianChart x:Name="CurveItChart" 
                <telerik:ChartSmartLabelsStrategy />
                <telerik:LinearAxis x:Name="verticalAxis" Minimum="{Binding MinValue}" Maximum="{Binding MaxValue}" />
                <telerik:DateTimeCategoricalAxis x:Name="datetimeAxis" 
                            <TextBlock Text="{Binding Converter={converters:TimeSpanFormatConverter}}" />
                <telerik:LineSeries ValueBinding="Value" CategoryBinding="TimeSpanValue" ItemsSource="{Binding Items}">

                            <Border BorderBrush="AliceBlue" BorderThickness="1" >
                                <Rectangle Width="15" Height="15" Fill="Black"
                                           MouseLeftButtonDown="Rectangle_MouseLeftButtonDown" />


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 updated question on 10 May 2021
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I am using the ContentTemplateSelector-Property of the RadPathButton, but nothing happens. Is there some trick to activate this feature?

My xaml:

        <utils:MessageDirectionTemplateSelector x:Key="messageDirectionTemplateSelector">
                    <ContentControl ContentTemplate="{StaticResource icon:outMessage}"/>
                    <ContentControl ContentTemplate="{StaticResource icon:inMessage}"/>

<telerik:RadPathButton Content="{Binding DataContext, RelativeSource={RelativeSource Self}}"
                                       ContentTemplateSelector="{StaticResource messageDirectionTemplateSelector}"/>


The Selector-Class:

public class MessageDirectionTemplateSelector : DataTemplateSelector { public override DataTemplate SelectTemplate(object item, DependencyObject container) { if (item is MessageItem) { return Properties.Settings.Default.CanIdHex ? HexEditDataTemplate : DecEditDataTemplate; } if (item is MessageSignalItem) { return Properties.Settings.Default.MuxValueHex ? HexEditDataTemplate : DecEditDataTemplate; } if (item is EnumValueItem) { return Properties.Settings.Default.EnumValueHex ? HexEditDataTemplate : DecEditDataTemplate; }

return null; }

public DataTemplate HexEditDataTemplate { get; set; } public DataTemplate DecEditDataTemplate { get; set; } }



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 updated question on 10 May 2021
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I have to need to set the background to each row different way also based on some property value changes, I need to change the background of the row as well runtime. I have attached the screenshot, I want a similar row and cell background also those brush values can be changed runtime.

Can someone guide me on how can I achieve this without affecting the performance much?

Thanks in advance.


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 asked on 10 May 2021
3 answers


I have a step line chart with the trackball enabled. The ChartTrackBallBehavior is like this.

<telerik:ChartTrackBallBehavior ShowIntersectionPoints="True" ShowTrackInfo="True" SnapMode="None" SnapSinglePointPerSeries="True"/>


My problem is that the closest point can be on the left or on the right of the trackball line. I need the closest point to be always the one on the left. Is there a way to change the default behavior so that I can programmatically set the closest point when trackball line moves? I have attached an image to better explain my problem.



Telerik team
 answered on 10 May 2021
0 answers



I have a Word document in docx format and mail merge with Excel in xls format.

The following are mergefields that rendered properly in Word but not when I do mail merge in my code.

{ MERGEFIELD TODAY \@ “MM/dd/yy” }

{ MERGEFIELD BAL \# ####,0.00 }

The following code:

                    using (Stream stream = new FileStream(docxPath +docxFilename, FileMode.Open))
                        stream.Seek(0, SeekOrigin.Begin);
                        byte[] bytes = new byte[stream.Length];
                        stream.Read(bytes, 0, bytes.Length);

                        templateDocument = new DocxFormatProvider().Import(bytes);
                        IEnumerable mailMergeSource = this.GetMailMergeDataSource(worksheet);
                        mergeDocument = templateDocument.MailMerge(mailMergeSource);

Above is the main code that do mailmerge

The GetMailMergeDataSource is give below:

        private IEnumerable GetMailMergeDataSource(Worksheet worksheet)
            List<DynamicDataObject> mailMergeSource = new List<DynamicDataObject>();
            string[] fieldNames = new string[worksheet.UsedCellRange.ColumnCount];
            int columnCount;
            int rowCount;
            CellSelection selection;

            for (columnCount = 0; columnCount < worksheet.UsedCellRange.ColumnCount; columnCount++)
                selection = worksheet.Cells[0, columnCount];
                fieldNames[columnCount] = selection.GetValue().Value.RawValue.ToString();

            for (rowCount = 1; rowCount < worksheet.UsedCellRange.RowCount; rowCount++)
                DynamicDataObject data = new DynamicDataObject();
                for (columnCount = 0; columnCount < worksheet.UsedCellRange.ColumnCount; columnCount++)
                    selection = worksheet.Cells[rowCount, columnCount];
                    data.Set(fieldNames[columnCount], selection.GetValue().Value.RawValue);

                if (columnCount > 0)

            return mailMergeSource;

DynamicDataaObject is derived from Telerik own's sample document-processing-sdk-master > WordsProcessing

the SaveFile is below:

        private void SaveFile(RadFlowDocument document)
            using (Stream stream = File.OpenWrite(newDocxPath + newDocxFilename))
                DocxFormatProvider formatProvider = new DocxFormatProvider();

                DocxExportSettings exportSettings = new DocxExportSettings
                    AutoUpdateFields = true,
                    InvalidDocumentAction = InvalidDocumentAction.ThrowException
                formatProvider.ExportSettings = exportSettings;
                formatProvider.Export(document, stream);



It works. It merged into another docx document but the Merge Field format failed.  But to do the same with Word merge, the resulting file shows proper format.

Let me know if you need full working sample that demo the problem.



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 asked on 09 May 2021
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I have a scatter point series with chart track ball enabled and SnapMode set to ClosestPoint, but with multiple series added to the chart I see a point per series.


Each colour in above image is a separate series added from code. The chart itself is in XAML.

                    <telerik:RadCartesianChart Grid.Row="0"   BorderBrush="Transparent" Background="White"  x:Name="radChartView" HorizontalAlignment="Stretch" VerticalContentAlignment="Stretch" DockPanel.Dock="Top">
                            <telerik:ChartTrackBallBehavior ShowIntersectionPoints="True" ShowTrackInfo="False" SnapMode="ClosestPoint" />
                            <Style TargetType="Polyline">
                                <Setter Property="Visibility" Value="Collapsed" />



I've only seen examples of SnapMode=ClosestPoint on LineSeries plots. Should this work on ScatterPointSeries?



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 asked on 09 May 2021
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I've used telerik rad diagram for creating a kind of blue-print system (flow system). In this flow-system we have a lot of nodes and connections. Is it possible to show connections like this?


At the moment it looks like this:

I've tried to work with the bezier-connection-type, but that didn't work as expected:

Thanks a lot!

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 asked on 09 May 2021