Questions on UI for WPF Forum

1 answer

3 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

10 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

9 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

1 answer

22 views

RadGridView - Grid with 2 or more Footers

I currently have a function grid similar to:

<telerik:RadGridView Grid.Row="2" Grid.ColumnSpan="2" x:Name="MyGridView"
                     ItemsSource="{Binding MyItems}"
                     RowIndicatorVisibility="Collapsed"
                     ShowColumnFooters="True"
                     ShowGroupPanel="False"
                     IsReadOnly="True"
                     HorizontalContentAlignment="Stretch"
                     VerticalAlignment="Top">
    <telerik:RadGridView.Columns>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding MonthDisplay}" Header="Month" Width="65">
            <telerik:GridViewDataColumn.Footer>
                <TextBlock Text="Totals:"/>
            </telerik:GridViewDataColumn.Footer>
        </telerik:GridViewDataColumn>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Column1Data}" Header="Column 1" Width="*" MinWidth="40" MaxWidth="95" DataFormatString="#,###0.##" TextAlignment="Right" FooterTextAlignment="Right">
            <telerik:GridViewDataColumn.AggregateFunctions>
                <telerik:SumFunction/>
            </telerik:GridViewDataColumn.AggregateFunctions>
        </telerik:GridViewDataColumn>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Column2Data}" Header="Column 2" Width="*" MinWidth="40" MaxWidth="95" DataFormatString="#,###0.##" TextAlignment="Right" FooterTextAlignment="Right">
            <telerik:GridViewDataColumn.AggregateFunctions>
                <telerik:SumFunction/>
            </telerik:GridViewDataColumn.AggregateFunctions>
        </telerik:GridViewDataColumn>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Column3Data}" Header="Column 3" Width="*" MinWidth="40" MaxWidth="95" DataFormatString="#,###0.##" TextAlignment="Right" FooterTextAlignment="Right">
            <telerik:GridViewDataColumn.AggregateFunctions>
                <telerik:SumFunction/>
            </telerik:GridViewDataColumn.AggregateFunctions>
        </telerik:GridViewDataColumn>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Column4Data}" Header="Column 4" Width="*" MinWidth="40" MaxWidth="95" DataFormatString="#,###0.##" TextAlignment="Right" FooterTextAlignment="Right">
            <telerik:GridViewDataColumn.AggregateFunctions>
                <telerik:SumFunction/>
            </telerik:GridViewDataColumn.AggregateFunctions>
        </telerik:GridViewDataColumn>
    </telerik:RadGridView.Columns>
</telerik:RadGridView>

So the grid would show results like:

Month	Column1	Column2	Column3	Column4
Jan	1	2	3	4
Feb	1	2	3	4
March	1	2	3	4
Totals:	3	6	9	12

What I now want to do is add another footer row so that the grid would look like:

Month	Column1	Column2	Column3	Column4
Jan	1	2	3	4
Feb	1	2	3	4
March	1	2	3	4
Totals:	3	6	9	12
Average:1	2	3	4

Is it possible to add a 2nd footer row and if so how can I accomplish that?

GridView

answered on 26 May 2025

0 answers

12 views

Filter and Select on RadGridview

Hi,

I have rad grid view with Grouping along with Select checkbox (GridviewCheckboxcolum). I need below help

I need to know how we can achieve Select all functionality on Grid as well ex: If i select check box column in header it has to select all the rad Gridview groups as well
I also need to know how can achieve group filtering as well
How we can achieve sorting with Group Names?

Thanks in advance

GridView

asked on 22 May 2025

2 answers

51 views

RadGridView: Change color of Row selector

Hello everybody,

in my WPF Application I am using Telerik's RadGridView. Everything is working fine so far.

But there is a little design issue, I am facing with.

In my App I am using Windows11Theme, if I use this, every row in my GridView is starting with a blue column. Sadly I am not able to find out, how to change this color.

Previously, I was using Windows8Theme and there I used "StrongColor" property to change this color. But I am not able to find out, how to change it in Windows11Theme.

Attached is an image, which shows the row, I want to change.

Thanks for your support.

BR,

Alex

answered on 06 May 2025

1 answer

33 views

Gridview Filter Window Stays on Top of Other App Windows.

1. Go to the GridView | Filtering Configuration example in the Telerik WPF Demo app.

2. Choose Popup for Filtering Mode.

3. Open filtering for Company Name.

4. Alt-Tab to another app window.

5. Observe as filter window appears on top of the app's window.

Is this expected behaviour?

GridView

answered on 29 Apr 2025

1 answer

43 views

Self-Referencing RadGridView does not display children as itself

When reading https://docs.telerik.com/devtools/wpf/controls/radgridview/hierarchical-gridview/self-referencing-grid I was expecting that `Self-Referencing` RadGridView means it uses own columns and rest visual stuff to display all nested child RadGridViews. Since it references the same type in the underlying data on every hierarchy level (that is self-referencing), it's obviously should display all levels in the same way (as it displays itself on top-level).

Turned out it was not the case. Each child level requires own visual template, own columns with own styling. We have about 20 columns with heavy styling each (more than 500 lines in .xaml) for top-level `RadGridView`. Copy-pasting all that into `RadGridView.HierarchyChildTemplate` is not an option.

In your demo application, I saw that you add columns manually for a child `RadGridView` from `RadGridView1_DataLoading` handler in code-behind. I was hoping it was a mistake.

GridView

answered on 08 Apr 2025

1 answer

31 views

Binding Map VisualizationLayer ItemsSource to filtered QueryableCollectionView

Hello,

In our app we are using filtering through a RadGridView bound to a QueryableCollectionView that wraps an ObservableCollection. Now I'm trying to use that filtered QueryableCollectionView as the ItemSource for a VisualizationLayer in a RadMap so that the filter on the grid also applies to items shown on the map, but the bind fails with the following error: "System.ArgumentException: 'Telerik.Windows.Data.QueryableCollectionView' is not a valid value for property 'Source'."

I've attached a quick project replicating the issue with the relevant code in MainWindow.xaml:

            <!-- Doesn't work -->
            <telerik:VisualizationLayer ItemsSource="{Binding ItemViewModelsView }" ItemSelectionMode="None">
                <telerik:VisualizationLayer.ItemTemplate>
                    <DataTemplate DataType="{x:Type local:ItemViewModel}">
                        <Ellipse Fill="Blue" Width="12" Height="12" telerik:MapLayer.Location="{Binding Location}"/>
                    </DataTemplate>
                </telerik:VisualizationLayer.ItemTemplate>
            </telerik:VisualizationLayer>
            
            <!-- Also doesn't work pulling directly from the GridView -->
            <telerik:VisualizationLayer ItemsSource="{Binding Items, ElementName=GridView }" ItemSelectionMode="None">
                <telerik:VisualizationLayer.ItemTemplate>
                    <DataTemplate DataType="{x:Type local:ItemViewModel}">
                        <Ellipse Fill="Blue" Width="12" Height="12" telerik:MapLayer.Location="{Binding Location}"/>
                    </DataTemplate>
                </telerik:VisualizationLayer.ItemTemplate>
            </telerik:VisualizationLayer>
            
            <!-- Works but isn't filtered -->
            <telerik:VisualizationLayer ItemsSource="{Binding ItemViewModels }" ItemSelectionMode="None">
                <telerik:VisualizationLayer.ItemTemplate>
                    <DataTemplate DataType="{x:Type local:ItemViewModel}">
                        <Ellipse Fill="Blue" Width="12" Height="12" telerik:MapLayer.Location="{Binding Location}"/>
                    </DataTemplate>
                </telerik:VisualizationLayer.ItemTemplate>
            </telerik:VisualizationLayer>

and the ViewModel:

public partial class MainWindowViewModel : ObservableObject
{
    [ObservableProperty] private ObservableCollection<ItemViewModel> _itemViewModels;
    public QueryableCollectionView ItemViewModelsView { get; private set; }
//...
}

It appears to me that the issue is because QueryableCollectionView is both an IEnumerable and a ICollectionView so when it tries to assign it to the MapItemsSource the CollectionViewSource.IsSourceValid() that's called during that assignment is returning false because it is an ICollectionView.

Is there a known workaround for this or suggested alternative to get the expected functionality?

Thanks!

GridView

Map

answered on 26 Mar 2025

0 answers

35 views

Prevent auto-search/filter that occurs after editing cells/rows?

RadGridView, for WPF .NET Framework 4.8, automatically hides rows that do not match the filter/search criteria after a row has been edited. How does one prevent the auto-filtering/searching?

A very important workflow for our customers is to search / filter for outliers and then edit the found rows. After they finish editing, they don't want the row to automatically disappear because of the search / filter doesn't match the row after the edits.

The customer only wants to search / filter if they actually initiated the action. They do not want auto searching and filtering.

GridView

asked on 24 Mar 2025