I am trying out RadControls for WPF Q1 2012.

When setting up line series for a cartesian chart I set the vertical axis in each series. Some of the series can use the same vertical axis so I assign the same linear axis for the vertical axis in each of those series.
 
Is this the correct way to share a vertical axis between series?

I wonder since if I call Clear() on the chart series after setting things up in this way I get a null reference exception as follows:

System.NullReferenceException was caught
  Message=Object reference not set to an instance of an object.
  Source=Telerik.Windows.Controls.Chart
  StackTrace:
       at Telerik.Windows.Controls.ChartView.Axis.OnDetached(RadChartBase oldChart) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\Axis.cs:line 582
       at Telerik.Windows.Controls.ChartView.ChartElementPresenter.Detach() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\ChartElementPresenter.cs:line 93
       at Telerik.Windows.Controls.ChartView.RadChartBase.OnPresenterRemoved(ChartElementPresenter presenter) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\RadChartBase.cs:line 520
       at Telerik.Windows.Controls.ChartView.CartesianSeries.OnDetached(RadChartBase oldChart) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\CartesianChart\Series\CartesianSeries.cs:line 161
       at Telerik.Windows.Controls.ChartView.ChartElementPresenter.Detach() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\ChartElementPresenter.cs:line 93
       at Telerik.Windows.Controls.ChartView.RadChartBase.OnPresenterRemoved(ChartElementPresenter presenter) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\RadChartBase.cs:line 520
       at Telerik.Windows.Controls.ChartView.PresenterCollection`1.ClearItems() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\PresenterCollection.cs:line 61
       at XXX.LineChart.SetUpLineChart() in C:\Workspaces\XXX\LineChart.xaml.cs:line 317

The exception doesn't happen if each series has a unique axis.

If this is the correct way of sharing a vertical axis between series then how do I clear the series without getting an exception?

I have developed a custom control for multiple selection in Rad Combobox. Now i want to show the selected items as comma separated string. Can i manipulate the display member of rad combo box at runtime?

Hi Telerik:
How can I hide the entire group header column (the bottom level only) as pointed in the screenshot below? I have attached xaml for your reference.

Thanks,
Cheau

        <!-- ScheduleView -->

        <telerik:RadScheduleView x:Name="scheduleView"

                                Grid.Row="2"                                

                                MaxTimeRulerExtent="500"

                                AppointmentsSource="{Binding Tasks, Mode=TwoWay}"

                                ResourceTypesSource="{Binding ScheduleOptionList, Mode=TwoWay}"

                                GroupDescriptionsSource="{Binding GroupCollection, Mode=TwoWay}"

                                CurrentDate="{Binding DefaultDate}"                                              

                                NavigationHeaderVisibility="Collapsed"                               

                                AllowDrop="True"

                                SnapAppointments="True"  

                                MinAppointmentWidth="22"

                                Height="Auto">

 

            <telerik:RadScheduleView.DragDropBehavior>

                <local:ScheduleDragDropBehavior/>

            </telerik:RadScheduleView.DragDropBehavior>

 

            <telerik:RadScheduleView.AppointmentItemContentTemplate>

                <DataTemplate>

                    <StackPanel>

                        <TextBlock Text="{Binding Subject}"  FontWeight="Bold"/>

                        <StackPanel Orientation="Horizontal">

                            <TextBlock Text="{Binding Start, StringFormat={}{0:H:mm}}"/>

                            <TextBlock Text=" - "/>

                            <TextBlock Text="{Binding End, StringFormat={}{0:H:mm}}"/>

                        </StackPanel>

                    </StackPanel>

                </DataTemplate>

            </telerik:RadScheduleView.AppointmentItemContentTemplate>

 

            <telerik:RadScheduleView.ActiveViewDefinition>

                <telerik:DayViewDefinition Orientation="Horizontal" FirstDayOfWeek="Monday" TimerulerMajorTickStringFormat="{}{0:HH}"

                                            MinorTickLength="1h"  MajorTickLength="1h" MinTimeRulerExtent="700" GroupHeaderDateStringFormat="{}{0:MM/dd}" />

               

            </telerik:RadScheduleView.ActiveViewDefinition>                      

 

        </telerik:RadScheduleView>

 

Hi All
How can I get font size from SelectionMiniToolBar in pixels instead of points.
Thanks
Deepak

Part 1: Date format in GridViewDataColumn:
I have a need to display a DateTime in a column with the following format: "MMM dd yyyy h:mm:ss tt". How would I go about doing that? Using the DataFormatString dependency property seemed like the logical choice, but did nothing.


Part 2: How do I filter by date?
On the Telerik webpage under the heading "Filtering and Excel-like Filtering", there is a date time filter. How do I enable that for a GridViewDataColumn that has a DateTime as a backing property type? I've tried all sorts of things, and this is what I'm currently using, but it does nothing - I only am able to use the standard string filter.



Part 3: How do I show empty cells for DateTime.Min values?
I also have the need to show an empty cell if the backing value is DateTime.Min. How would I accomplish that?

I have added data item to rad carousel and I just wanted get the zeroth position to be focused by below format

Curent                 --    5    4    3    2    1                     

I want like this         --  3    2    1

Thanks in advance.

Arafath

Hello,

I am trying to clear the selection in a combobox by setting the bound object on the binding to null. This however does not make the combobox go blank as required.

I know there is a button you can have displayed on the combobox so the user can clear the selection but I need the functionality through the binding.

Is there a way to do this please?

Thanks

When setting the RadExpander.IsTabStop to false the control still responds to tab


TabStop should still work for internal controls unless IsExpanded = false;

Hi,

How to fire an event, when select an item from the RadGridviewComboBox column by using MVVM architecture.

Please guide me, i am new to this telerik controls.


Thanks in Advance..

hi,
I want to disable the automatic movement of carousel item, which takes the current clicked carousel item to the top container.
thanks