<telerik:GridViewDataColumn DataFormatString="N0" DataMemberBinding="{Binding MyValue}" Header="{Binding MyLabel, StringFormat=This {0}}" />

"This " is not shown in my header. What am I doing wrong?

Hi I am using the DataGrid with UI virtualization enabled.
In XAML the main attributes set on the Grid are:
EnableRowVirtualization="True"
ScrollMode="Deferred"
SelectionMode="Extended"

The grid binds to a VirtualQueryableCollection that makes uses of the ItemsLoading event to load data into the VirtualQueryableCollectionView.
So a queryable is not passed in as a constructor.

The Grid is working fine except for when I want to call Grid.SelectedItems.Clear().

I am manually populating the Grid.SelectedItems with the correct rows that should be selected.

The Grid has 240,000 rows. I select a few rows at the top to the grid.
Then I scroll down the bottom of the grid.
At the bottom I add another row to the selection, so Grid.SelectedItems has 3 items in it. Everything is fine.
A call is made to Grid.SelectedItems.Clear().
The process freezes and eventually a Stackoverflow exception is thrown.
The stacktrace does not show much. Throughout the trace a call to VirtualQueryableCollection.Load() is occurring for the whole list in increments of the LoadSize (100).

This is with version:
2013.1.022.0.40

If I try version
2012.3.1129.40
The process does not have a Stackoverflow exception but is stuck in a loop and does not return.

If I select items at the top of the grid only, it works fine. And if I select items at the bottom of the grid it works fine.

The machine I work on is not connected to the internet but I may be able to provide the stacktrace if needed.

Hi all.

I need to sync position and width for two RadCartesianChart's.

XAML:

style definition for chart's:            
<Style x:Key="ChartStyle" TargetType="telerik:RadCartesianChart">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type telerik:RadChartBase}">
                            <Border Background="{TemplateBinding Background}"
                                    BorderBrush="{TemplateBinding BorderBrush}"
                                    BorderThickness="{TemplateBinding BorderThickness}">
                                <Grid>
                                    <ContentPresenter x:Name="emptyContent"
                                                      HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                                      VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                                                      Content="{TemplateBinding EmptyContent}"
                                                      ContentTemplate="{TemplateBinding EmptyContentTemplate}"
                                                      IsHitTestVisible="False"
                                                      Visibility="Collapsed" />
                                    <Canvas x:Name="adornerContainer"
                                            HorizontalAlignment="Stretch"
                                            VerticalAlignment="Stretch"
                                            Background="Transparent">
                                        <Canvas x:Name="labelContainer"
                                                HorizontalAlignment="Stretch"
                                                VerticalAlignment="Stretch">
                                            <Canvas x:Name="renderSurface"
                                                    HorizontalAlignment="Stretch"
                                                    VerticalAlignment="Stretch">
                                                <Border x:Name="plotAreaDecoration" Style="{TemplateBinding PlotAreaStyle}" />
                                            </Canvas>
                                        </Canvas>
                                    </Canvas>
                                </Grid>
                            </Border>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>

chart #1:
<telerik:RadCartesianChart x:Name="DeviationChart"
                                               Grid.Row="1"
                                               HorizontalAlignment="Stretch"
                                               VerticalAlignment="Stretch"
                                               MaxZoom="{Binding MaxZoom}"
                                               MouseMove="Chart_OnMouseMove"
                                               PanOffset="{Binding PanOffset,
                                                                   Mode=TwoWay}"
                                               Style="{StaticResource ChartStyle}"
                                               Zoom="{Binding Zoom,
                                                              Mode=TwoWay}">
 
                        <telerik:ScatterAreaSeries x:Name="DeviationSeries"
                                                   Fill="{Binding DeviationFillColor}"
                                                   ItemsSource="{Binding DeviationPoints}"
                                                   Opacity="{Binding DeviationOpacity}"
                                                   Stroke="{Binding DeviationColor}"
                                                   StrokeMode="AllButPlotLine"
                                                   StrokeThickness="{Binding DeviationThickness}"
                                                   Tag="{Binding Path=Settings.PressureEU,
                                                                 Converter={StaticResource PressureEUConverter}}"
                                                   XValueBinding="X"
                                                   YValueBinding="Y">                            
                        </telerik:ScatterAreaSeries>
 				<!-- ... -->
                        <telerik:RadCartesianChart.HorizontalAxis>
                            <telerik:LinearAxis x:Name="DeviationChartHorizontalAxis"
                                                MajorTickStyle="{StaticResource TopChartTickStyle}"
                                                Maximum="{Binding Path=ChartSettings.ChartMaxX}"
                                                Minimum="{Binding Path=ChartSettings.ChartMinX}"
                                                ShowLabels="False"
                                                Visibility="Collapsed" />
                        </telerik:RadCartesianChart.HorizontalAxis>
 
                        <telerik:RadCartesianChart.VerticalAxis>
                            <telerik:LinearAxis x:Name="DeviationChartVerticalAxis"
                                                Title="{Binding Path=PressureBaseEUText}"
                                                LabelFormat="N2"
                                                LastLabelVisibility="Visible"
                                                Maximum="{Binding DeviationChartSettings.ChartMaxY}"
                                                Minimum="{Binding DeviationChartSettings.ChartMinY}"
                                                Style="{StaticResource LinearAxisStyle}" />
                        </telerik:RadCartesianChart.VerticalAxis>
 
                        <telerik:RadCartesianChart.Grid>
                            <telerik:CartesianChartGrid MajorXLinesRenderMode="All"
                                                        MajorYLinesRenderMode="All"
                                                        StripLinesVisibility="None"
                                                        Style="{StaticResource CartesianChartGridStyle}" />
                        </telerik:RadCartesianChart.Grid>
 
                        <telerik:RadCartesianChart.Behaviors>
                            <telerik:ChartPanAndZoomBehavior PanMode="Both" ZoomMode="Both" />
                            <telerik:ChartTrackBallBehavior ShowIntersectionPoints="False"
                                                            ShowTrackInfo="True"
                                                            SnapMode="None" />
                        </telerik:RadCartesianChart.Behaviors>
 
                    </telerik:RadCartesianChart>

					
chart #2:
<telerik:RadCartesianChart x:Name="Chart"
                                           Grid.Row="1"
                                           MaxZoom="{Binding MaxZoom}"
                                           MouseMove="Chart_OnMouseMove"
                                           PanOffset="{Binding PanOffset,
                                                               Mode=TwoWay}"
                                           Style="{StaticResource ChartStyle}"
                                           Zoom="{Binding Zoom,
                                                          Mode=TwoWay}">
 
                    <telerik:ScatterAreaSeries x:Name="ElevationSeries"
                                               Fill="{Binding ElevationFillColor}"
                                               ItemsSource="{Binding RealElevationsPoints}"
                                               Opacity="{Binding ElevationOpacity}"
                                               Stroke="{Binding ElevationColor}"
                                               StrokeMode="AllButPlotLine"
                                               StrokeThickness="{Binding ElevationThickness}"
                                               XValueBinding="X"
                                               YValueBinding="Y">
                        <telerik:ScatterLineSeries.LegendSettings>
                            <telerik:SeriesLegendSettings Title="{Binding ElevationDescription}" />
                        </telerik:ScatterLineSeries.LegendSettings>
 				<!-- ... -->
                        <telerik:ScatterLineSeries.TrackBallInfoTemplate>
                            <DataTemplate>
                                <Border Background="#FFEBEBEB">
                                    <TextBlock Text="{Binding Path=DataPoint.XValue, StringFormat=\{0:N3\}}" />
                                </Border>
                            </DataTemplate>
                        </telerik:ScatterLineSeries.TrackBallInfoTemplate>
                    </telerik:ScatterAreaSeries>
 
                    <telerik:RadCartesianChart.HorizontalAxis>
                        <telerik:LinearAxis x:Name="ChartHorizontalAxis"
                                            LabelFormat="N0"
                                            Maximum="{Binding Path=ChartSettings.ChartMaxX}"
                                            Minimum="{Binding Path=ChartSettings.ChartMinX}"
                                            Style="{StaticResource LinearAxisStyle}" />
                    </telerik:RadCartesianChart.HorizontalAxis>
 
                    <telerik:RadCartesianChart.VerticalAxis>
                        <telerik:LinearAxis x:Name="ChartVerticalAxis"
                                            HorizontalLocation="Left"
                                            LabelFormat="N2"
                                            Maximum="{Binding ChartSettings.ChartMaxY}"
                                            Minimum="{Binding ChartSettings.ChartMinY}"
                                            Style="{StaticResource LinearAxisStyle}" />
                    </telerik:RadCartesianChart.VerticalAxis>
 
                    <telerik:RadCartesianChart.Grid>
                        <telerik:CartesianChartGrid MajorXLinesRenderMode="All"
                                                    MajorYLinesRenderMode="All"
                                                    StripLinesVisibility="None"
                                                    Style="{StaticResource CartesianChartGridStyle}" />
                    </telerik:RadCartesianChart.Grid>
 
                    <telerik:RadCartesianChart.Behaviors>
                        <telerik:ChartPanAndZoomBehavior PanMode="Both" ZoomMode="Both" />
                        <telerik:ChartTrackBallBehavior ShowIntersectionPoints="False"
                                                        ShowTrackInfo="True"
                                                        SnapMode="None" />
                    </telerik:RadCartesianChart.Behaviors>
 
                </telerik:RadCartesianChart>

Code:
public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
 
            if (!Chart.IsTemplateApplied) Chart.ApplyTemplate();
            if (!DeviationChart.IsTemplateApplied) DeviationChart.ApplyTemplate();
 
            var chartpad = Chart.Template.FindName("plotAreaDecoration", Chart) as Border;
            var deviationpad = DeviationChart.Template.FindName("plotAreaDecoration", DeviationChart) as Border;
 
            if (null != chartpad && null != deviationpad)
            {
                chartpad.SizeChanged += (sender, args) =>
                    {
                        // Set position of left edge of chart #1 relative to chart #2
                        object left = chartpad.GetValue(Canvas.LeftProperty);
                        deviationpad.SetValue(Canvas.LeftProperty, left);
                        // Set width of chart #1 relative to chart #2
                        object width = chartpad.GetValue(WidthProperty);
                        deviationpad.SetValue(WidthProperty, width);
                    };
            }
        }
But this doesn't work.
Any ideas?

Best regards,
George.

Hi 

I am working on the functionality having ChartView inside RadTileView. We are displaying a lot of charts in tiles.
The problem I am facing is when the Tile is restored, I want to remove all the legends and wants to show only chart. And again when the tile is maximized I want to display entire chart with legends.

I am attaching a image for better understaing.

Hallo,

I'm using the RadGridView for our business applications.
But our users are complaining that the data will not be loaded quickly.
So I've made ​​some comparative tests with a regular DataGrid and found out that the DataGrid binds data much faster than the RadGridView.

Loadingtime of 50000 Datarows with 8 Columns: 17 miliseconcs.
Binding to a DataGrid: 120 milliseconds. Used Memory: 7 MByte.
Binding to a RadGridView: 4 seconds. Used Memory: 51 MByte.

Are there any settings in RadGridView to get the same performance as a DataGrid?

I used following xaml for the RadGridView:


and following for the DataGrid:

Hi,

i use the ContentTemplateSelector property of the RadTabControl. This way i can define different DataTemplates.

I created a property in my TabViewModel class called Content and based on its value I am selecting different DataTemplates. I also defined the different DataTemplates in the App.xaml file.

Now I want to change the Header of the TabItem out of the UserControl. And this is the problem, how do I solve this problem?

thanks
best regrads
rene

Hi,

is it possible to show/hide the GridLines via condition? So if condition is true, then show horizontal Gridline, if not, then hide it?
Want to make it, because Merging is not as possible as in older Application (take a look at attachment).

Or is there any other solution to show grid as attachment with WPF RadGridView?

Best regards,

David

I have managed to set up a PRISM region within the radRibbonView.RadRibbonTab which then has radRibbonGroup's loaded in from the modules containing the buttons for that module.  All good so far, however the modules donot load in the order which the radribbongroups need to appear in the tab.

I have tried using the radOrderedwrappanel in conjunction with the groupvariant priority as per snippit below to provide a solution with no luck.  Is there a way of doing this or will I have to look into custom loading order of the modules?

I ahve also added a custom regionAdaptor which seems to be working fine to allow the radribbongroups to be loaded into the orderedwrappanel.  However the ordering and sizing didnt work - it started wrapping after 3 ribbonGroups and it didnt order the groups correctly.

Hi,

I would like to know if it's possible to add new words to the existing spellchecker of Telerik?
Also, I would like to know if it possible to use an external spellchecker such a medical spellchecker with Telerik components?

Thank's

Hi there

For the past day I'm trying to implement drag and drop behavior in the same gridview. I used the demo example to implement this. 
The events are fired when I click a row and drag, but the row isn't dropped.
When I debug the code, the DragDropPayloadManager.GetDataFromObject() method returns null in OnRowDragOver and  OnDrop  for the following lines:


Because of that, both events return nothing. 

Am I missing something?

Thanks in advance
Lowie