ArgumentNullException when editing items in a “grouped” gridview

6 posts, 1 answers
  1. Paulo
    Paulo avatar
    5 posts
    Member since:
    Apr 2011

    Posted 18 Dec 2012 Link to this post

    An ArgumentNullException is thrown when editing items in a “grouped” grid.
    It’s easily reproducible with a small WPF application containing the following files:

    MainWindow.xaml

    <Window x:Class="gridgroupingbug.MainWindow"
            Title="MainWindow" Height="350" Width="525">
        <StackPanel>
            <telerik:RadGridView
                                x:Name="_iniEntriesGrid"
                                ItemsSource="{Binding Path=IniEntryModels}"
                                SelectedItem="{Binding Path=SelectedIniEntry, Mode=TwoWay}"
                                AutoGenerateColumns="False"
                                AutoExpandGroups="True"
                                CanUserInsertRows="True">
                <telerik:RadGridView.GroupDescriptors>
                    <telerik:GroupDescriptor Member="Scope" SortDirection="Ascending" />
                    <telerik:GroupDescriptor Member="SectionName" SortDirection="Ascending" />
                </telerik:RadGridView.GroupDescriptors>
                <telerik:RadGridView.Columns>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding Path=Scope}" Header="Scope" Width="3*"/>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding Path=SectionName}" Header="Section" Width="3*"/>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding Path=Key}" Header="Key" Width="4*"/>
                </telerik:RadGridView.Columns>
            </telerik:RadGridView>
            <Button Click="AddClicked">AddLine</Button>
        </StackPanel>
    </Window>

    MainWindow.xaml.cs

    using System.Collections.ObjectModel;
    using System.Globalization;
    using System.Windows;
    namespace gridgroupingbug
    {
        public partial class MainWindow
        {
            public MainWindow()
            {
                InitializeComponent();
                IniEntryModels = new ObservableCollection<IniEntryModel>();
                _iniEntriesGrid.DataContext = this;
                for (var i = 0; i < 2; i++)
                {
                    IniEntryModels.Add(new IniEntryModel
                        {
                            Key = i.ToString(CultureInfo.InvariantCulture),
                            Scope = "MyScope1",
                            SectionName = "SomeSection",
                        });
                }
            }
            public ObservableCollection<IniEntryModel> IniEntryModels { get; private set; }
            private void AddClicked(object sender, RoutedEventArgs e)
            {
                IniEntryModels.Add(new IniEntryModel());
            }
        }
        public class IniEntryModel
        {
            public string Scope { get; set; }
            public string SectionName { get; set; }
            public string Key { get; set; }
        }
    }

    Telerik version: 2012.3.1129.40

    Steps to reproduce:

    1.       Make sure you have at least two levels of grouping set in the grid (in our example, the first two columns)
    2.       Add a new item to the list bound to the grid’s ItemsSource (in our example, IniEntryModel)
    3.       Edit the newly added line (any column)
    4.       Move the focus to somewhere out of the grid (click in the button, for example), and an Exception is thrown.

    Exception/Stack Trace:
    System.ArgumentNullException was unhandled

      HResult=-2147467261

      Message=Value cannot be null.

    Parameter name: element

      Source=Telerik.Windows.Controls

      ParamName=element

      StackTrace:

           at Telerik.Windows.Controls.ParentOfTypeExtensions.<GetParents>d__0.MoveNext() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Core\Controls\Extensions\ParentOfTypeExtensions.cs:line 74

           at System.Linq.Enumerable.<OfTypeIterator>d__aa`1.MoveNext()

           at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)

           at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)

           at Telerik.Windows.Controls.GridView.GridViewCell.HandlePendingEdit(UIElement focusedElement) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Cells\GridViewCell.cs:line 1021

           at Telerik.Windows.Controls.GridView.GridViewCell.HandlePendingEditOnLostFocus() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Cells\GridViewCell.cs:line 899

           at Telerik.Windows.Controls.GridView.GridViewCell.Editor_LostFocus(Object sender, RoutedEventArgs e) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Cells\GridViewCell.cs:line 930

           at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

           at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

           at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

           at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)

           at System.Windows.Controls.Primitives.TextBoxBase.OnLostFocus(RoutedEventArgs e)

           at System.Windows.UIElement.IsFocused_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)

           at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

           at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

           at System.Windows.Controls.TextBox.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.ClearValueCommon(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata)

           at System.Windows.DependencyObject.ClearValue(DependencyPropertyKey key)

           at System.Windows.Input.FocusManager.OnFocusedElementChanged(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.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)

           at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)

           at System.Windows.Input.FocusManager.SetFocusedElement(DependencyObject element, IInputElement value)

           at System.Windows.Input.KeyboardNavigation.UpdateFocusedElement(DependencyObject focusTarget)

           at System.Windows.FrameworkElement.OnGotKeyboardFocus(Object sender, KeyboardFocusChangedEventArgs e)

           at System.Windows.Input.KeyboardFocusChangedEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)

           at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

           at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

           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.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)

           at System.Windows.Input.InputManager.ProcessStagingArea()

           at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)

           at System.Windows.Input.KeyboardDevice.ChangeFocus(DependencyObject focus, Int32 timestamp)

           at System.Windows.Input.KeyboardDevice.TryChangeFocus(DependencyObject newFocus, IKeyboardInputProvider keyboardInputProvider, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)

           at System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)

           at System.Windows.Input.KeyboardDevice.Focus(IInputElement element)

           at System.Windows.UIElement.Focus()

           at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonDown(MouseButtonEventArgs e)

           at System.Windows.UIElement.OnMouseLeftButtonDownThunk(Object sender, MouseButtonEventArgs e)

           at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)

           at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

           at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

           at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

           at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)

           at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)

           at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)

           at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

           at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

           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.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)

           at System.Windows.Input.InputManager.ProcessStagingArea()

           at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)

           at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)

           at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)

           at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

           at System.Windows.Interop.HwndSource.InputFilterMessage(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 MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, 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.Threading.Dispatcher.Run()

           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 gridgroupingbug.App.Main() in c:\lixo\gridgroupingbug\obj\Debug\App.g.cs:line 0

           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()

      InnerException:

    Thanks!

    PQ.

  2. Answer
    Nedyalko Nikolov
    Admin
    Nedyalko Nikolov avatar
    871 posts

    Posted 19 Dec 2012 Link to this post

    Hello,

    This issue has been fixed with some of our internal builds.
    Could you please try your scenario with our latest internal build and let me know if the problem persists?
    Thank you in advance.

    Kind regards,
    Nedyalko Nikolov
    the Telerik team

    Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.

  3. Paulo
    Paulo avatar
    5 posts
    Member since:
    Apr 2011

    Posted 21 Dec 2012 Link to this post

    Hi,
    Thanks for the reply. Yes, it works fine with the new internal build. Should I wait for the next stable release or is this internal build stable enough to be distributed in my installer?

    Thanks,
    PQ.
  4. Maya
    Admin
    Maya avatar
    4062 posts

    Posted 24 Dec 2012 Link to this post

    Hi Paulo,

    Generally, our internal builds should be stable enough, but still they are not fully tested. They are our way to provide fixes each week. 

    Regards,
    Maya
    the Telerik team

    Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.

  5. Matthew C
    Matthew C avatar
    1 posts
    Member since:
    Oct 2012

    Posted 18 Feb 2013 Link to this post

    Is there a workaround for this problem?  I have a similar problem happening with RadGridView for Silverlight using 2012 Q3 release.  Downloading the latest dev build has addressed this problem; however, the powers that be have declared "thou shalt not use a development build." 

    --Matt
  6. Maya
    Admin
    Maya avatar
    4062 posts

    Posted 19 Feb 2013 Link to this post

    Hello Matthew,

    Our official release Q1 2013 is expected to be available in a couple of days. So, my recommendation would be to wait for it since its binaries will contain the fix you need. 

    All the best,
    Maya
    the Telerik team

    Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.

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