Holidays exception

[Gian]

Hi,

You have set binding property in the xaml, initialize the property in the viewmodel, have showholidays set to true (default gantt setting) and not add any days to the collection.

The error seems appear when i unloaded tha gantt control.

Here below the stack strace 

System.NullReferenceException

  HResult=0x80004003

  Message=Riferimento a un oggetto non impostato su un'istanza di oggetto.

  Source=Syncfusion.Gantt.Wpf

  StackTrace:

   at Syncfusion.Windows.Controls.Gantt.DateTimeUtility.GetHolidays(GanttHolidayCollection ganttHolidays)

   at Syncfusion.Windows.Controls.Gantt.GanttControl.OnHolidaysChanged(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.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)

   at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)

   at System.Windows.Data.BindingExpression.Activate(Object item)

   at System.Windows.Data.BindingExpression.OnDataContextChanged(DependencyObject contextElement)

   at System.Windows.Data.BindingExpression.HandlePropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)

   at System.Windows.Data.BindingExpressionBase.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)

   at System.Windows.Data.BindingExpression.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)

   at System.Windows.DependentList.InvalidateDependents(DependencyObject source, DependencyPropertyChangedEventArgs sourceArgs)

   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)

If i not initialize the collection i don't have any erroe, but collection initialize with no days is not accepted.

Best regards

Gian Piero Truccolo

[Ramya Soundar Rajan]

Hi Gian Piero Truccolo, 

  

Greetings from Syncfusion.  

 

We have prepared a simple sample with the provided details and checked the reported crash. But we afraid that, we are not able to reproduce the reported issue in our side. Can you please check with the sample in the following location? If still you face the problem, please revert us by modifying the sample based on your application along with replication procedure. This would be helpful for us to give better solution in this. 

Sample link: https://www.syncfusion.com/downloads/support/forum/166099/ze/SimulationGanttProject-1160746628 

Regards, 

Ramya S.