Hi,

I have a LocalDataSourceProvider bound to a DataTable. Some of the columns allow nulls and some of the values in them are DBNull. I would like to be able to display a count of the values that aren't null. I've created my own aggregate function and I can add that to some of my AggregatePropertyDescriptions programmatically. I do have an example, but apparently I'm only allowed to upload images.

The questions I've got are:

Is there any easier way to do this?

Can I make this aggregate function appear in the UI in the Field List, so users can select it?

I only appear to be able to apply this to my nullable int property, and not my string property. Is that something I should be expecting?

Many thanks,

Richard

Hi, I got the code from http://docs.telerik.com/devtools/wpf/controls/radgridview/columns/how-to/scroll-item

My code :

when DropRowIndex = 16 and the items.count=17 , it calls the scrollFailedCallback , I tried to make it this.timetableGrid.Items[this.timetableGrid.Items.Count -1] and it still fails. WHy? My items count is 17 so it should not be failing. I hardcoded it into DropRowIndex = 15 and it is calling scrollFinishedCallback which is what I want to happen. May I ask why rowindex 16 is not working ?

if (this.timetableGrid.Columns.Count > 0 && DropColIndex <= this.timetableGrid.Columns.Count)
            {
                IsScrollBarForceIntoView = false;
                int offsetCol = 0; int offsetRow = 0;
                if ((DropColIndex + 3) <= (this.timetableGrid.Columns.Count - 1))
                    offsetCol = 3;
                if ((DropRowindex + 3) <= (this.timetableGrid.Items.Count - 1))
                    offsetRow = 3;
                this.timetableGrid.ScrollIntoViewAsync(this.timetableGrid.Items[DropRowindex + offsetRow], //the row
                                this.timetableGrid.Columns[DropColIndex + offsetCol], //the column
                                 new Action<FrameworkElement>((f) =>
                                  {
                                      App.MainWindow.IsBusy = false;
                                  }), new Action ( ()=>
                                      {
                                          App.MainWindow.IsBusy = false;
                                      }
                                    ));
                isDrop = false;
            }
            else
            {
                App.MainWindow.IsBusy = false;
                DropColIndex = 0;
            }

I used all resource string files for RadPivotGrid, but the message "Blank" could not find the key for translation. What is the procedure for translating this message?

I have a test project demonstrating the problem but I am not allowed to post

Hi,

I'm using the Q3 2016 version of the Telerik WPF controls suite.  I'm having a problem using a ScatterLineSeries in tandem with the "Batch" option on XamlRenderOptions for the series.  I'm using a ChartSeriesDescriptor with a style for the ScatterLineSeries that has the following:

That "DefaultVisualStyle" resource is defined like so:

When I use those options and add data points via bindings from the ChartSeriesProvider, I get a MissingMethodException, that seems to come from the UIAutomation system:

Is there anything I can do to use Batch for performance on this series?

Hi, I am experiancing an issue with the rad gridView where the binding errors are making the performance impossibe to work with,  the errors I get are

ystem.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=SelectedPane.IsActive; DataItem='RadPaneGroup' (Name=''); target element is 'PaneHeader' (Name='HeaderElement'); target property is 'IsHighlighted' (type 'Boolean')
System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=SelectedPane.IsActive; DataItem='RadPaneGroup' (Name=''); target element is 'PaneHeader' (Name='HeaderElement'); target property is 'IsHighlighted' (type 'Boolean')
System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=; DataItem=null; target element is 'RadMenuItem' (Name=''); target property is 'CommandParameter' (type 'Object')
System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=; DataItem=null; target element is 'RadMenuItem' (Name=''); target property is 'CommandTarget' (type 'UIElement')
System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=IsFloatingOnly; DataItem=null; target element is 'RadMenuItem' (Name=''); target property is 'IsChecked' (type 'Boolean')
System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=; DataItem=null; target element is 'RadMenuItem' (Name=''); target property is 'CommandParameter' (type 'Object')
System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=; DataItem=null; target element is 'RadMenuItem' (Name=''); target property is 'CommandTarget' (type 'UIElement')

I have checked that the DataContext is not null, and when using the WPF built in Listbox in place of the RadGridView, I do not get any issues. I have seen the same question asked on StackOverflow with no response

https://stackoverflow.com/questions/17842712/wpf-cannot-retrieve-value-using-the-binding-and-no-valid-fallback-value-exists

Part of my code looks like this :

<telerik:RadGridView x:Name="SummaryGrid" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
                             CanUserDeleteRows="False"
                             CanUserFreezeColumns="False"
                             RowIndicatorVisibility="Collapsed"
                             CanUserResizeColumns="False"
                             AutoGenerateColumns="False"
                             CanUserSortGroups="False"
                             GroupRenderMode="Flat"
                             ShowGroupPanel="False"
                             EnableRowVirtualization="False"
                             ItemsSource="{Binding VerifiedItems, FallbackValue={x:Static constant:FallBackConstants.FallBackBaseConversionsList}}">
            <telerik:RadGridView.Columns>
                -->
        <!--column shown the path -->
        <!--
                <telerik:GridViewDataColumn Width="*"
           Header="Type"
           IsGroupable="False"
                                            DataMemberBinding="{Binding Type}"
           IsFilterable="True"
                                            IsReadOnly="True">
                    <telerik:GridViewDataColumn.CellTemplate>
                        <DataTemplate>
                            <StackPanel HorizontalAlignment="Stretch" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Hidden">
                                <TextBlock Text="{Binding Type, FallbackValue={x:Static constant:FallBackConstants.FallBackString}}" />
                            </StackPanel>
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellTemplate>
                </telerik:GridViewDataColumn>

Is there anything that I might be missing in terms of binding on the RadgridView?

Hello Telerik

In my applycation, I choose a pdf file, create preview image by using ThumbnailFactory, and show file in PdfViewer. But I receive exception as title because Telerik's framework cannot read pdf file with encryption algorithm 4. And PdfViewer  I google this bug and find nothing. So can you provide me some tip, trick to get over this bug. Thank you so much.

Hey community,
the row redorder sample doesn't work within a RadLayoutControl. It looks like as if the RadLayoutControl would intercept the DragEvent, so the  GiveFeedbackEventArgs is not called within the RowReorderBehavior.
Can you provide me asample or give me a hint please.

I've tried it with this sample:

http://docs.telerik.com/devtools/wpf/controls/dragdropmanager/how-to/howto-draganddrop-within-radgridview

Kind regards,
Lars

Hi,

I would trace in a RadTreeView the structure Groups/Items, wher Groups is first level and Items second one.

I thought that I could intercept "Item Added To Group event", can I do this in somehow?

Two cases I shuold keep:

• I drag and drop 2 or more objects into RadDiagram, add theme both and create a group for theme.
• I have already 2 or more objects into RadDiagram, user selects theme and clicks "Group Items" command.