Setting Content Type of virtual editors (Opened using IVsUIShell.CreateDocumentWindow)

Thank you for sharing the details

To ensure your LSP Language Server activates for virtual documents opened via IVsUIShell.CreateDocumentWindow, you’ll need to make sure the Content Type is correctly associated with the editor instance—even if the document is virtual.

Recommended Steps to Resolve

1. Use a Recognized File Extension
   • Ensure the pszMkDocument parameter includes a file extension (e.g., .sql) that your ILanguageClient is registered for.
   • This helps Visual Studio route the document to the correct content type.
2. Explicitly Set the Content Type
   • When creating the text buffer, use MEF to inject the correct content type: `csharp ITextBuffer buffer = textBufferFactory.CreateTextBuffer(contentType);

Host this buffer in a WpfTextViewHost or similar editor control.

3. Verify LanguageClient Registration
   • Confirm your ILanguageClient is decorated with: `csharp [Export(typeof(ILanguageClient))] [ContentType("sql")] [FileExtension(".sql")]
   • The content type must match exactly what’s used in the buffer.
4. Use a Custom Editor Factory (if needed)
   • If you're using a custom editor, override CreateEditorInstance to assign the content type before returning the view.

Let me know if the issue persists after following these steps. I’ll be happy to assist further if needed.

If the issue has been resolved, kindly mark the response as answered."