Question

I know this sounds bizarre, but it is true.

I have a simply WPF application that hosts a Visio control. There are no problems with that. Some essential events, such as DocumentOpened does work.

But if I want to handle other events, for instance, BeforeShapeDeleted, CellChanged, they stop firing once I bind Shapes to a ListBox in the DocumentOpened.

Here is my code:

public partial class MainWindow : Window
{
    private AxMicrosoft.Office.Interop.VisOcx.AxDrawingControl visioControl = new AxMicrosoft.Office.Interop.VisOcx.AxDrawingControl();

    public MainWindow()
    {
        InitializeComponent();
        this.host.Child = this.visioControl;
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        this.visioControl.DocumentOpened += new AxMicrosoft.Office.Interop.VisOcx.EVisOcx_DocumentOpenedEventHandler(visioControl_DocumentOpened);
        this.visioControl.Window.Application.BeforeShapeDelete += new Microsoft.Office.Interop.Visio.EApplication_BeforeShapeDeleteEventHandler(Application_BeforeShapeDelete);
        this.visioControl.Window.Application.CellChanged += new Microsoft.Office.Interop.Visio.EApplication_CellChangedEventHandler(Application_CellChanged);
    }

    void Application_CellChanged(Microsoft.Office.Interop.Visio.Cell Cell)
    {
        MessageBox.Show("Changed");
    }

    void Application_BeforeShapeDelete(Microsoft.Office.Interop.Visio.Shape Shape)
    {
        MessageBox.Show("Deleted");
    }

    void visioControl_DocumentOpened(object sender, AxMicrosoft.Office.Interop.VisOcx.EVisOcx_DocumentOpenedEvent e)
    {
        //if I comment the line bellow BeforeShapeDelete and CellChanged will work, if I leave it uncommented, they won't work...
        lstShapes.ItemsSource = this.visioControl.Window.Application.ActivePage.Shapes;
    }

    private void mnuOpen_Click(object sender, RoutedEventArgs e)
    {
        Microsoft.Win32.OpenFileDialog dlgOpenDiagram = new Microsoft.Win32.OpenFileDialog();

        if (dlgOpenDiagram.ShowDialog() == true)
        {
            this.visioControl.Src = dlgOpenDiagram.FileName;
        }
    }
}

The issue lies in the DocumentOpened method in the line that defines an ItemsSource…

Answer 1

I was in contact with Microsoft. It seems like I had some problem with Visio on my machine.