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WPF App with threading issues

Posted By:      Posted Date: October 05, 2010    Points: 0   Category :WPF


Here's a weird issue that I've no idea why it occurs.

The situation is as follows:
* I have a WPF application that uses a data model that my views are bound against.
* The views are presented using a ContentPresenter and DataTemplate that matches the datamodel and corresponding view.
* There are no custom threads that modify any part of the data model and/or UI.

Despite the last fact, I occasionally get the following exception: 

System.InvalidOperationException: The calling thread cannot access this object because a different thread owns it.
  at System.Windows.DependencyObject.GetValue(DependencyProperty dp)
  at System.Windows.Controls.TextSearch.GetPrimaryText(Object item, BindingExpression primaryTextBinding, DependencyObject primaryTextBindingHome)
  at System.Windows.Controls.TextSearch.GetPrimaryTextFromItem(ItemsControl itemsControl, Object item)
  at System.Windows.Controls.ComboBox.SelectedItemUpdated()
  at System.Windows.Controls.ComboBox.OnSelectionChanged(SelectionChangedEventArgs e)
  at System.Windows.Controls.Primitives.Selector.SelectionChanger.End()
  at System.Windows.Controls.Primitives.Selector.SelectionChanger.SelectJustThisItem(Object item, Boolean ass

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