Altova XMLSpy 2025 Enterprise Edition 

The code snippet below (from the AutomateXMLSpy example) lists the code for two event handlers. The AutomateXMLSpy example (see the file Form1.cs)  is located in the C# subfolder of the API Examples folder:

You can compile and run the project from within Visual Studio 2012/2013/2015/2017/2019/2022.

Code snippet

       // Event handler for OnDocumentOpened event

       private void handleOnDocumentOpened(XMLSpyLib.Document i_ipDocument)

       {

           MessageBox.Show("Document " + i_ipDocument.Name + " was opened!");

       }

       // Remember if the event handler is currently registered.

       private bool bEventHandlerIsRegistered = false;

       // Handler for button 'OnDocuemntOpened Event On/Off

       private void toggleOnDocumentOpenedEvent_Click(object sender, EventArgs e)

       {

           if (XMLSpy != null)

           {

               if (bEventHandlerIsRegistered)

                   XMLSpy.OnDocumentOpened -= new XMLSpyLib._IApplicationEvents_OnDocumentOpenedEventHandler(handleOnDocumentOpened);

               else

                   XMLSpy.OnDocumentOpened += new XMLSpyLib._IApplicationEvents_OnDocumentOpenedEventHandler(handleOnDocumentOpened);

               bEventHandlerIsRegistered = !bEventHandlerIsRegistered;

           }

       }