I have an issue using the RadialMenu with the GridView.

If I use the following code : 

I will have a NullReferenceException with the following stacktrace if I scroll down and backward two time :

   at Telerik.Windows.Controls.RadRadialMenu.OnRadialContextMenuChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
   at System.Windows.StyleHelper.InvalidateContainerDependents(DependencyObject container, FrugalStructList`1& exclusionContainerDependents, FrugalStructList`1& oldContainerDependents, FrugalStructList`1& newContainerDependents)
   at System.Windows.StyleHelper.DoStyleInvalidations(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle)
   at System.Windows.StyleHelper.UpdateStyleCache(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle, Style& styleCache)
   at System.Windows.FrameworkElement.OnStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
   at System.Windows.FrameworkElement.UpdateStyleProperty()
   at System.Windows.TreeWalkHelper.InvalidateOnTreeChange(FrameworkElement fe, FrameworkContentElement fce, DependencyObject parent, Boolean isAddOperation)
   at System.Windows.FrameworkElement.OnVisualParentChanged(DependencyObject oldParent)
   at System.Windows.Media.Visual.FireOnVisualParentChanged(DependencyObject oldParent)
   at System.Windows.Media.Visual.RemoveVisualChild(Visual child)
   at System.Windows.Media.VisualCollection.DisconnectChild(Int32 index)
   at System.Windows.Media.VisualCollection.InternalRemove(Visual visual)
   at System.Windows.Controls.UIElementCollection.RemoveInternal(UIElement element)
   at System.Windows.Controls.UIElementCollection.Remove(UIElement element)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.NestedLayoutStrategy.DisconnectRecycledContainers()
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.NestedLayoutStrategy.MeasureOverride(Size constraint)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.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 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
   at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at System.Windows.Application.Run()
   at Adhoc.ToolsWPF.Sample.App.Main()
   at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

 

This is obviously caused by virtualisation.

I tried to set the RadialMenu as ContextMenu directly in the RadGridView managing the ItemsSource of the RadialMenu with the selecteditem of the RadGridView but I have another issue where the RadialMenu will show and hide if the show event occure while the selected row change.

Hi,

the scrollbar doesn't appear in the filtercontrol whan I have a lot of distinct items in a gridview.

I use the Windows8Touch theme without customization.

Any idea ?

Thanks

I have a requirement to generate columns once define column count on top of the grid, how can I achieve this, 
attached image file I depict the way I'm expecting this.

Hello,

I have a very simple piece of code to bind my RadMenu control to an ObservableList of Menus.

My xaml looks like this:

<telerik:RadMenu Name:"MainMenu" ItemsSource="{Binding Menus}"/>

This works fine. In order to display something more interesting, I can add:

<telerik:RadMenu Name:"MainMenu" ItemsSource="{Binding Menus}" DisplayMemberPath="Name" />

And I get the Name property of my Menus displayed.

Now I would like to get a step further as my Menu class has a SubMenus property so I try to play with RadMenuItem styling and this is where I get lost.

If I write simple code like this, that according to me should do the same as the DisplayMemberPath :

<telerik:RadMenu Name:"MainMenu" ItemsSource="{Binding Menus}" >

      <telerik:RadMenu.Resources>

            <Style TargetType="telerik:RadMenuItem">

                    <Setter Property="Header" Value="{Binding Name}"/>

            </Style>

       </telerik:RadMenu.Resources>

</telerik:RadMenu>

Nothing is displayed on my window when running the code. 

I have checked everything, I can see in my view that the Menu is created and the items inside, etc... but the RadMenus don't display.

As soon as I comment out the Style, menus are displayed. As everything else is straightforward in my code, I think I am missing something obvious but I can't find it. There is no error in debug for binding issues or else.

I use Telerik 2017.1.22.45.

Thanks for your feedback.

Hello,

I'm using telerik control tools for WPF UI ver: 2015.1.0401.45

I have noticed that radlistbox has a huge memory leak. On replacing radlistbox with Microsoft listbox, memory leak does not occur.

I'm attaching the demo project (replace extension of file from  .jpg to .zip).

This project demonstrates the problem of memory leak. Actually the memory leak occurs on data binding

I've remarked the Microsoft listbox in xaml, so to prove my claim, just use Microsoft listbox instead  of radlistbox and see the difference in memory usage of the processes.

Do you have a patch to fix this issue ?

Thank you,

Alex

 

I have a Radar with Markers Graph and have the graph axis for the angular axis set from 0 to 360  (like a polar graph). However, I would like to rotate it where instead of a '0' on the top, it say 180, then 270 instead of 90, etc. Basically ad 180 degrees and flip it upside down. 

I'm seeing an odd error with the grouping in the RadGridView. It's worth pointing out that the data is being displayed and grouped properly despite the error. However, I still want it resolved.

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=Columns[ContactType]; DataItem=null; target element is 'ColumnGroupDescriptor' (HashCode=34214014); target property is 'Column' (type 'GridViewColumn')

Below is the relevant portion of my XAML. The extra columns have been elided as is the rest of the visual tree. I get the same problem if it's in different parts of the visual tree and even with just the one column.

​<telerik:RadGridView x:Name="ContactsGridView"
                        ItemsSource="{Binding Employee.Contacts}">
    <telerik:RadGridView.Columns>
        <telerik:GridViewComboBoxColumn Header="Type" UniqueName="TypeColumn"
                                        ItemsSource="{Binding ContactTypesView}"
                                        DataMemberBinding="{Binding ContactTypeId}"
                                        SelectedValueMemberPath="Id" DisplayMemberPath="TypeName"
                                        EditTriggers="CellClick" ShowColumnWhenGrouped="False" />
    </telerik:RadGridView.Columns>
    <telerik:RadGridView.GroupDescriptors>
        <telerik:ColumnGroupDescriptor Column="{Binding Columns[\TypeColumn\], ElementName=ContactsGridView}"
                                        SortDirection="Ascending" />
    </telerik:RadGridView.GroupDescriptors>
</telerik:RadGridView>

I have a style that governs the several grids in my window. Here is that XAML:

<Style TargetType="{x:Type telerik:RadGridView}">
    <Setter Property="BorderThickness" Value="0" />
    <Setter Property="GridLinesVisibility" Value="None" />
    <Setter Property="ShowGroupPanel" Value="False" />
    <Setter Property="RowIndicatorVisibility" Value="Collapsed" />
    <Setter Property="RowDetailsVisibilityMode" Value="Collapsed" />
    <Setter Property="AutoGenerateColumns" Value="False" />
    <Setter Property="CanUserFreezeColumns" Value="False" />
    <Setter Property="SelectionUnit" Value="FullRow" />
    <Setter Property="AutoExpandGroups" Value="True" />
    <Setter Property="GroupRenderMode" Value="Flat" />
</Style>

Any ideas of what might be causing this error? I created a stripped down solution and couldn't duplicate the error message.

Hey, Guys
This tough to describe. In Brief, I want the RadDiagram has the circuit diagram feature like the attached picture. The certain connector can connect to line (or named as RadDiagram connection).  Is any approaching to this feature?

Thanks a lot, By William

Dear Telerik,

I encountered pretty weird behavior  while using VirtualQueryableCollectionView+grid.

I have  a grid and a simple combobox for filtering. When I select a value in the combobox everything works as expected:

-- selected combobox value changed

-- handle property change event in the model

-- set collection total and reload required page

However if i click any cell I can see that virtual collection reloads ALL the pages. I attached a small repro u can play with.

Scenario 1: start the app - select a unit from the combobox - click any cell (e.g. top left cell) - check the output

Scenario 2: start the app - click the button - click any cell (e.g. top left cell) - check the output

-- 

Here is the xaml

 

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        Title="MainWindow" Height="350" Width="525" WindowStartupLocation="CenterScreen">

<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />

</Grid.RowDefinitions>

<telerik:RadButton Content="reload" HorizontalAlignment="Left" Margin="2" Command="{Binding ReloadCommand}" />

<telerik:RadComboBox  ItemsSource="{Binding Units}" HorizontalAlignment="Right" Margin="2"
EmptyText="select unit" SelectedItem="{Binding Unit, Mode=TwoWay}"/>

<telerik:RadGridView  AutoGenerateColumns="False" ShowGroupPanel="False" 
ItemsSource="{Binding Data}" Grid.Row="1" IsReadOnly="True"  >
<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding RowNo}" Header="row no" />

</telerik:RadGridView.Columns>
</telerik:RadGridView>
</Grid>
</Window>

Here is the model

 

#region Usings
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Windows.Input;
using Telerik.Windows.Data;
#endregion

namespace WpfApplication1
{
public class Model
{
#region Class constants
private const int PAGE_SIZE = 100;
#endregion

#region Class members
private UnitType _unit;
protected VirtualQueryableCollectionView _data;
#endregion

#region Class properties
public IEnumerable<UnitType> Units
{
get
{
return Enum
.GetValues( typeof( UnitType ) )
.Cast<UnitType>()
.ToList();
}
}
public UnitType Unit 
{
get 
{
return _unit;
}
set 
{
_unit = value;

LoadHistory();
}
}
public VirtualQueryableCollectionView Data
{
get
{
return _data;
}
}
public CommandHandler ReloadCommand { get; set; }
#endregion

#region Class initialization
public Model() 
{
_data = new VirtualQueryableCollectionView()
{
LoadSize = 100
};

_data.ItemsLoading += ( o, ea ) => OnNeedDataPage( ea.StartIndex / _data.LoadSize );

ReloadCommand = new CommandHandler( x => LoadHistory(), true );
}
#endregion

#region Class event handlers
private void LoadHistory()
{
_data.ResetItems();
LoadHistory( 0 );
}
protected void OnNeedDataPage( int iPageIndex )
{

LoadHistory( iPageIndex );
}
private void LoadHistory( int iPageIndex )
{
var iTotalCount = 1000;
Debug.WriteLine( "load glass history page: " + iPageIndex );

if( iTotalCount != _data.VirtualItemCount )
{
_data.VirtualItemCount = iTotalCount;
}

int iStartIndex = iPageIndex * PAGE_SIZE;
var list = new List<TestData>();

for( int i = iPageIndex * PAGE_SIZE; i < iPageIndex * PAGE_SIZE + PAGE_SIZE; ++i )
{
list.Add( new TestData() { RowNo = i } );
}

_data.Load( iStartIndex, list );
}
#endregion

#region Class internal structs
public enum UnitType 
{
none,
a,
b
}
public class TestData
{
public int RowNo { get; set; }
}
#endregion
}

public class CommandHandler:ICommand
{
#region Class members
protected Action<object> _action;
protected bool _canExecute;
#endregion

#region Class events
public event EventHandler CanExecuteChanged;
public void FireCanExecuteChanged( bool b )
{
_canExecute = b;

if( null != CanExecuteChanged )
{
CanExecuteChanged( this, EventArgs.Empty );
}
}
#endregion

#region Class initialization
public CommandHandler( Action<object> action, bool canExecute )
{
_action = action;
_canExecute = canExecute;
}
#endregion

#region Class public methods
public bool CanExecute( object parameter )
{
return _canExecute;
}
public void Execute( object parameter )
{
_action( parameter );
}
#endregion
}
}

 

I'm getting null ref error when i move from one cell to another in a rad grid view. This started happening once i move from version from 2011.1.419.35 to 2011.2.920.40.

Steps to reproduce

Create a grid so that columns so that all columns are not visible.
Bind the a column to an int/decimal value (<telerik:GridViewDataColumn DataMemberBinding="{Binding Path=OrderUnits, Mode=TwoWay}" UniqueName="QuantityColumn" Header="Quantity" />)
enter edit mode in this column
scroll to the end of the grid view so that this column is out of view
scroll back to original location
tab out of edit.

Version - 2011.2.920.40
WPF4


Stack trace below.

   at Telerik.Windows.Controls.GridView.GridViewDataControl.RaiseDataErrorEvent(DataErrorEventArgs args)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.CommitCurrentEdit(GridViewRow gridViewRow)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.PerformRowEditEnded(GridViewCell currentCell)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.CommitCellEdit(GridViewCell currentCell, Boolean isLeavingRow)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.CommitEdit()
   at Telerik.Windows.Controls.GridView.GridViewDataControl.OnCommitEditCommand(Object sender, ExecutedRoutedEventArgs e)
   at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
   at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)
   at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
   at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
   at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.ExecutePendingCommand()
   at Telerik.Windows.Controls.GridView.GridViewDataControl.PendAndExecuteCommands(KeyEventArgs e)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.OnKeyDown(KeyEventArgs e)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawKeyboardActions actions, Int32 scanCode, Boolean isExtendedKey, Boolean isSystemKey, Int32 virtualKey)
   at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)
   at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)
   at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
   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)