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Problem in adding a new row

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GridView
This is a migrated thread and some comments may be shown as answers.
Reeta
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Reeta asked on 19 May 2009, 12:08 PM
I had a grid view which contains a template column and other columns are autogenerated. I found that "AddingNewDataItem" event is fired when i press insert when the grid view is focused. but it gives me an exception that

Exception has been thrown by the target of an invocation.

System.Reflection.TargetInvocationException was unhandled
  Message="Exception has been thrown by the target of an invocation."
  Source="mscorlib"
  StackTrace:
       at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
       at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
       at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
       at System.Delegate.DynamicInvokeImpl(Object[] args)
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
       at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
       at System.Windows.Threading.DispatcherOperation.InvokeImpl()
       at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
       at System.Threading.ExecutionContext.runTryCode(Object userData)
       at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext 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, Boolean isSingleParameter)
       at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
       at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
       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 Cerebrata.CloudStorage.UI.WPF.App.Main() in D:\Projects\CerebrataCloudStorage\UI.WPF\obj\Debug\App.g.cs:line 0
       at System.AppDomain._nExecuteAssembly(Assembly 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.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: System.NullReferenceException
       Message="Object reference not set to an instance of an object."
       Source="Telerik.Windows.Controls.GridView"
       StackTrace:
            at Telerik.Windows.Controls.GridView.GridViewCell.ShowEditor() in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 488
            at Telerik.Windows.Controls.GridView.GridViewCell.<ToggleEditor>b__0() in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 593
            at Telerik.Windows.Controls.GridView.GridViewCell.ModifyCellTemplate(Action executeAction) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 461
            at Telerik.Windows.Controls.GridView.GridViewCell.ToggleEditor() in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 593
            at Telerik.Windows.Controls.GridView.EditContext.OnCellEditModeChanged(GridViewCell cell, Boolean newIsInEditMode) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Editing\EditContext.cs:line 231
            at Telerik.Windows.Controls.GridView.GridViewCell.IsInEditModeChanged(DependencyObject target, DependencyPropertyChangedEventArgs e) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 586
            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, OperationType operationType)
            at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, OperationType operationType, Boolean isInternal)
            at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
            at Telerik.Windows.Controls.GridView.GridViewCell.set_IsInEditMode(Boolean value) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 214
            at Telerik.Windows.Controls.GridView.EditContext.SwitchCellToEditMode(GridViewCell cell) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Editing\EditContext.cs:line 243
            at Telerik.Windows.Controls.GridView.EditContext.BeginEdit(GridViewCell gridViewCell) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Editing\EditContext.cs:line 259
       InnerException:


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Reeta
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answered on 20 May 2009, 05:35 AM
I made the template column read only and it works for me. But now i had another problem that on "AddingNewDataItem" event i made a new DataRowView and set e.NewObject like this

                DataRowView dv  = myDataTable.DefaultView.AddNew();
                dv["IsMarkForDelete"] = false;
                dv["TimeStamp"] = DateTime.Now;
                e.NewObject = dv;

now it insert 2 rows in the data grid with same values one of them is in editable mode. And when i click on another row the extra row is removed. But if i call commitEdit()  then both rows are there.

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Nedyalko Nikolov
Telerik team
answered on 22 May 2009, 12:01 PM
Hello Reeta,

It seems that you've hit a known issue with the 2009_Q1_SP1 release, which is already fixed.
Service pack 2 will be available on Monday next week.
Sorry for the inconvenience caused.

Best wishes,
Nedyalko Nikolov
the Telerik team

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Reeta
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Reeta
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Nedyalko Nikolov
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