I am working on a radgridview and I ran into a problem. In my gridview I hide a column from the header row after it is grouped. When I filter a certain column and then drag that column to the group panel the filtering still applies to that column, however, the filter indicator is no longer present, and since I hide that column from the header the user has no way of seeing that the column is still filtered. I just want the user to have some visual display that the column is still filtered. I would like the filter indicator to be on the group panel item after I drag it there if that is possible. Can this be achieved? If not what are some other options that would help me with this problem.

Thanks for any help 

I have GridView 2012.3.1314.40. This view is created with EnableColumnVirtualization and EnableRowVirtualization true.
Data is added slowly by another thread.

When browsing this GridView I get an System.NullReferenceException with the following stack

Error in function Unhandled exception: System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.Windows.Controls.GridView.GridViewHeaderCell.SetLeftGripperVisibility()
   at Telerik.Windows.Controls.GridView.GridViewHeaderCell.HookupGripperEvents()
   at Telerik.Windows.Controls.GridView.GridViewHeaderCell.OnApplyTemplate()
   at System.Windows.FrameworkElement.ApplyTemplate()
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureCell(GridViewColumn column, GridViewCellBase cell, Size size)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.RealizeAndMeasureCells(Int32 startIndex, Int32 predictedLastIndex, Func`2 calculateNextIndex)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.UpdateVirtualizedCells()
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.ContextLayoutManager.UpdateLayout()
   at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
   at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()
   at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
   at Telerik.Windows.Controls.GridView.GridViewHeaderCell.SetLeftGripperVisibility()
   at Telerik.Windows.Controls.GridView.GridViewHeaderCell.HookupGripperEvents()
   at Telerik.Windows.Controls.GridView.GridViewHeaderCell.OnApplyTemplate()
   at System.Windows.FrameworkElement.ApplyTemplate()
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureCell(GridViewColumn column, GridViewCellBase cell, Size size)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.RealizeAndMeasureCells(Int32 startIndex, Int32 predictedLastIndex, Func`2 calculateNextIndex)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.UpdateVirtualizedCells()
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.ContextLayoutManager.UpdateLayout()
   at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
   at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()
   at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

I do not know what is causing this exception and how to prevent or catch it without killing my application first.

Any help would be appreciated.

Pieter

I am trying to get the header row of my group to stretch to the full grid width.

I had a look at the following online documentation: http://www.telerik.com/help/wpf/gridview-styling-group-row.html and as a result I tried the following. Unfortunately it doesn't seem to work correctly, what do I need to do get it to stretch properly?

The clear button is clearing the input field in the PropertyGrid but the value on the model is never set.

Hi,

We are currently checking out Telerik controls to be used for our new project. Are the points below feasible?
1. Can we have a mergefield that is a Dictionary?

Ex. We have an Item class with a Dictionary property. Now, I want a mergefield that points to the keys of the the Dictionary property.

    Ex:
    <MERGEFIELD BeerBrands["Bud"]> or <MERGEFIELD BeerBrands.Bud>
   
    where Beerbrands = class property w/ch is a Dictionary
      Bud is the Key of the dictionary.  The result should be the value of the dictionary.

2. Taking this a step further, can we have a mergefield where the fieldName points to a Dictionary<string, new Dictionary<string, string>>.
    Ex. <MERGEFIELD BeerBrands.Bud.Price>

   where Beerbrands = class property w/ch is a Dictionary;
         Bud = key of the 1st Dictionary;
         Price = key of the 2nd dictionary

Regards,
Mari

Hello,

 

I have a View whith a GridView bound to RadDataFilter bound to an QueryableEntityCollectionView<T> exposed in a View-Model.

I have few questions :

Does when the user add filter to the RadDataFilter the data is filtered directly in SQL ?
How to implement assync data loading ? I have the folowing exception when using the DeferRefresh method :

Cannot change or check the contents or Current position of the QueryableCollectionView whileRefresh is being deferred.

Thank you,

Benjamin

Hi,
I  am using the below code to display the bar code in WPF.

<telerik:RadBarcode39 x:Name="BarCodeDisplay" Grid.Row="4" Height="80" Width="100" HorizontalAlignment="Center" VerticalAlignment="Center" ShowChecksum="False" Text="Hello"/>

 

The code is getting displayed with the Text "Hello" below the bar. I need to just display the bar code without the Human readable text.
ShowText property is available in .NET and not in WPF. Let me know if there is any property to be set to hide the readable text "Hello",

I found this article about the Scheduler control in which I could see the possibility of creating an appointment with an Hourly recurrence.

I have tried to do the same with the RadScheduleView's create a new Appointment View, but I can't seem to find a way to have that Hourly recurrence option. I can't go lower than a daily recurrence. I need to be able to create an hourly recurrence from the appointment creation view.

How would I go about doing that?

Thank you

I have a GridView and it is binding a collection of objects that have around 30 fields/properties.  It ends up with around 30 columns and 1000+ rows.

If I use a Template for some of the columns I notice that the grid becomes much slower.  Are there any known issues or things I should look at in order to improve performance?

I have seen the demo with lots of columns and cells and if I don't style or use a Template my grid has relatively good performance.  It's when I try to use a Template that it starts to get slow.

My Template is used to create a left or right border and also display visual cues (border, color, tooltip) under certain conditions.  It's got about 8 border elements and 7 triggers.  Normally only one border element is visible and the other visual cues are collapsed, but the grid still performs very slowly.  However, even if I only use 1 border element in the template the grid becomes slower.

Hi,

I am trying to put what I am calling an app bar in a RadPane (see xaml) with limited success.

I want the app bar initially hidden but it it appears even though the RadPane is set to hidden.  If I set it to hidden in the window_loaded event that also does not hide the RadPane. When I mouse click on the RadPane header and then set visibility it works accordingly, What I am trying to do is when the user clicks on the RadPane header the code-behind will display the app bar.  By clicking on the RadPane header again the app bar will hide (Or a button in the app bar is pressed).  This seems to work OK except for the initial problem with not hiding the RadPane.  The other problem I am having is when  the app bar is hidden the TreeView control does not use the space of the hidden app bar.  The other feature that would be nice to have is an animation effect that slides the RadPane uo or down when displayed or hidden,  This is inside the RadDocking.

Thanks
Rich.

     <telerik:RadPaneGroup< telerik:ProportionalStackPanel.RelativeSize="75,25">
                        <telerik:RadPane Name="AvailableTables" 
                                     ContextMenuTemplate="{x:Null}"
                                     CanUserClose="False" CanFloat="False" CanUserPin="False">
                            <telerik:RadPane.TitleTemplate>
                                <DataTemplate>
                                    <TextBlock Text="Available Tables" MouseDown="AvailableColumnsHeader_MouseDown"/>
                                </DataTemplate>
                            </telerik:RadPane.TitleTemplate>
                            <Grid>
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="Auto"/>
                                    <RowDefinition Height="Auto"/>
                                </Grid.RowDefinitions>
                                
                                <telerik:RadPaneGroup Name="AvailableColumnsAppBarGroup" Background="LightGray">
                                    <telerik:RadPane  Name="AvailableColumnsAppBar" Height="32"  PaneHeaderVisibility="Collapsed" Visibility="Hidden">
                                        <WrapPanel HorizontalAlignment="Left" >
                                            <telerik:RadToggleButton Name="btnLocked"  IsChecked="False" IsThreeState="False" Height="30"
                                                         Margin="4,3,2,2" Content="Locked" Width="50" ></telerik:RadToggleButton>
                                       </WrapPanel>
                                    </telerik:RadPane>
                                </telerik:RadPaneGroup>
                                
                                <telerik:RadTreeView  Name="tvAvailableTables"
                                              Grid.Row="1"
                                                  SelectionChanged="tvAvailableTables_SelectionChanged"
                                                  SelectionMode="Multiple"
                                                  ScrollViewer.VerticalScrollBarVisibility="Auto" 
                                                  ScrollViewer.HorizontalScrollBarVisibility="Auto">
                                </telerik:RadTreeView>
                            </Grid>
                        </telerik:RadPane>
                    </telerik:RadPaneGroup>