ExportDXF/docs/plans/2026-02-17-autofill-from-export-history-design.md

Auto-fill Equipment/Drawing from Export History

Problem

When a SolidWorks file is opened that doesn't match the DrawingInfo regex (e.g., Conveyor Frame.sldasm instead of 5028 A02 Conveyor.slddrw), the equipment and drawing number dropdowns are left empty even though the file may have been exported before with known values.

Decision

• Lookup key: SolidWorks source file path (ActiveDocument.FilePath)
• Storage: Query the existing ExportRecords table (no new table or migration)
• Priority: Database lookup first; fall back to title regex parse if no history found

Design

Modify UpdateActiveDocumentDisplay() in MainForm.cs

When the active document changes:

1. Query the DB for the most recent ExportRecord where SourceFilePath matches activeDoc.FilePath (case-insensitive)
2. If found, parse the stored DrawingNumber via DrawingInfo.Parse() and auto-fill equipment/drawing dropdowns
3. If not found, fall back to current behavior: DrawingInfo.Parse(activeDoc.Title)

What doesn't change

• No schema changes, no new migration
• Equipment/drawing dropdowns still populated with historical values in InitializeDrawingDropdowns()
• Export flow untouched

Error handling

• DB query wrapped in try/catch so failures don't break the UI
• Case-insensitive path comparison (Windows paths are case-insensitive)