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why i cant delete a column in my datagrid ?   the error is: System.InvalidCastException: Unable to cast object of type 'Mendix.Modeler.WebUI.View.Views.Grids.GridColumnView' to type 'Mendix.Modeler.WebUI.View.Views.IContainerView'.   at Mendix.Modeler.WebUI.View.ViewHelpers.ViewHelperFromView.RemoveChild(IMoveableView childView) in Mendix.Modeler.WebUI.View\ViewHelpers\ViewHelperFromView.cs:line 22   at Mendix.Modeler.WebUI.View.ViewHelpers.ViewHelperList.RemoveChild(IMoveableView childView) in Mendix.Modeler.WebUI.View\ViewHelpers\ViewHelperList.cs:line 23   at Mendix.Modeler.WebUI.View.ViewHelpers.ViewHelperList.RemoveChild(IMoveableView childView) in Mendix.Modeler.WebUI.View\ViewHelpers\ViewHelperList.cs:line 23   at Mendix.Modeler.WebUI.View.Views.EntityWidgets.EntityWidgetView`1.DeleteChild(IMoveableView childView) in Mendix.Modeler.WebUI.View\Views\EntityWidgets\EntityWidgetView.cs:line 226   at Mendix.Modeler.WebUI.View.Views.MoveableView`1.Delete() in Mendix.Modeler.WebUI.View\Views\MoveableView.cs:line 52   at Mendix.Modeler.WebUI.View.Views.Documents.FormView.<>c__DisplayClass17_0.<DeleteSelection>b__1() in Mendix.Modeler.WebUI.View\Views\Documents\FormView.cs:line 83   at Mendix.Modeler.Utility.UndoManager.<>c__DisplayClass43_0.<Do>b__0() in Mendix.Modeler.Utility\Undo\UndoManager.cs:line 136   at Mendix.Modeler.Utility.UndoManager.TransactionDo(IUndoManagerProvider provider, String actionDescription, Func`1 action) in Mendix.Modeler.Utility\Undo\UndoManager.cs:line 279   at Mendix.Modeler.WebUI.View.Views.Documents.FormView.DeleteSelection(IDeletableView[] viewsToDelete) in Mendix.Modeler.WebUI.View\Views\Documents\FormView.cs:line 79   at Mendix.Modeler.WebUI.View.Editors.FormEditor.Delete() in Mendix.Modeler.WebUI.View\Editors\FormEditor.cs:line 721   at Mendix.Modeler.Core.View.Editors.TabbedEditor.JustHandleEditAction(EditAction action) in Mendix.Modeler.Core.View\Editors\TabbedEditors\TabbedEditor.cs:line 335   at Mendix.Modeler.WebUI.View.Editors.FormEditor.JustHandleEditAction(EditAction action) in Mendix.Modeler.WebUI.View\Editors\FormEditor.cs:line 710   at Mendix.Modeler.Core.View.Editors.TabbedEditor.HandleEditAction(EditAction action) in Mendix.Modeler.Core.View\Editors\TabbedEditors\TabbedEditor.cs:line 305   at Mendix.Modeler.Core.View.Menus.EditMenuItemsProvider.Delete(IEditActionHandler handler) in Mendix.Modeler.Core.View\Menus\MenuItemsProviders\EditMenuItemsProvider.cs:line 165   at Mendix.Modeler.Core.View.Menus.EditMenuItemsProvider.<.ctor>b__24_5() in Mendix.Modeler.Core.View\Menus\MenuItemsProviders\EditMenuItemsProvider.cs:line 86   at Mendix.Modeler.Core.View.Menus.MainMenu.<>c__DisplayClass10_0.<CreateButtonMenuItem>b__0(Object _, EventArgs _) in Mendix.Modeler.Core.View\Menus\MainMenu.cs:line 110   at Eto.Forms.MenuItem.PerformClick()   at Eto.Wpf.Forms.Menu.MenuItemHandler`3.System.Windows.Input.ICommand.Execute(Object parameter)   at System.Windows.Input.CommandManager.TranslateInput(IInputElement targetElement, InputEventArgs inputEventArgs)   at System.Windows.UIElement.OnKeyDownThunk(Object sender, 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.InputProviderSite.ReportInput(InputReport inputReport)   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 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

asked 2024-01-26

1 answers