Thread Locking CollectionViewSource
- by Robert
I added an event handler to my code and it broke all access to the CollectionViewSources in the SystemHTA class saying "The calling thread cannot access this object because a different thread owns it". My class was working when "this.systemHTA = new SystemHTA();" was placed outside of the DeviceManager_StateChanged() function.
public partial class MainWindow : Window
{
private DeviceManager DeviceManager = DeviceManager.Instance;
public SystemHTA systemHTA;
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
DeviceManager.StateChanged += new EventHandler<DeviceManagerStateChangedEventArgs>(DeviceManager_StateChanged);
DeviceManager.Initialize();
}
void DeviceManager_StateChanged(object sender, DeviceManagerStateChangedEventArgs e)
{
if (e.State == DeviceManagerState.Operational)
{
this.systemHTA = new SystemHTA();
}
}
private void button1_Click(object sender, RoutedEventArgs e)
{
this.systemHTA.GetViewSourceTest();
}
}
public class SystemHTA
{
private CollectionViewSource _deviceTestSource;
public SystemHTA()
{
_deviceTestSource = new CollectionViewSource();
_deviceTestSource.Source = CreateLoadData<HWController>.ControllerCollection;
}
public void GetViewSourceTest()
{
ListCollectionView view = (ListCollectionView)_deviceTestSource.View; //This creates an error saying a thread already owns _deviceTestSource
}
}
