---
phase: 04-bulk-operations-and-provisioning
plan: 08
subsystem: ui
tags: [wpf, mvvm, viewmodel, view, xaml, filetransfer, csharp, converters]

requires:
  - phase: 04-03
    provides: FileTransferService implementing IFileTransferService
  - phase: 04-07
    provides: ConfirmBulkOperationDialog, FolderBrowserDialog, SitePickerDialog, localization keys for transfer.*

provides:
  - TransferViewModel with source/dest selection, transfer mode, conflict policy, progress, per-item results, CSV export of failed items
  - TransferView.xaml + TransferView.xaml.cs — WPF UserControl for the file transfer tab
  - EnumBoolConverter and StringToVisibilityConverter added to converters file
  - IFileTransferService, BulkResultCsvExportService, TransferViewModel, TransferView registered in DI

affects:
  - 04-09
  - 04-10
  - MainWindow (tab wiring)

tech-stack:
  added: []
  patterns:
    - TransferViewModel follows FeatureViewModelBase override pattern (RunOperationAsync, OnTenantSwitched)
    - Dialog factories as Func<> set by code-behind to keep ViewModel testable
    - SitePickerDialog.SelectedUrls.FirstOrDefault() for single-site transfer selection
    - EnumBoolConverter for RadioButton binding to enum properties

key-files:
  created:
    - SharepointToolbox/ViewModels/Tabs/TransferViewModel.cs
    - SharepointToolbox/Views/Tabs/TransferView.xaml
    - SharepointToolbox/Views/Tabs/TransferView.xaml.cs
  modified:
    - SharepointToolbox/Views/Converters/IndentConverter.cs
    - SharepointToolbox/App.xaml
    - SharepointToolbox/App.xaml.cs

key-decisions:
  - "SitePickerDialog returns SelectedUrls (list); TransferView uses .FirstOrDefault() for single-site transfer — avoids new dialog variant while reusing existing dialog"
  - "EnumBoolConverter and StringToVisibilityConverter added to existing IndentConverter.cs — keeps converter classes co-located as project convention"
  - "TransferViewModel exposes CurrentProfile publicly — required by code-behind to build per-site TenantProfile for FolderBrowserDialog"

patterns-established:
  - "EnumBoolConverter: ConverterParameter=EnumValueName for RadioButton-to-enum binding (reusable for other enum properties in future ViewModels)"

requirements-completed:
  - BULK-01
  - BULK-04
  - BULK-05

duration: 20min
completed: 2026-04-03
---

# Phase 04 Plan 08: TransferViewModel + TransferView Summary

**WPF file transfer tab with source/dest site+folder browser, Copy/Move mode, conflict policy, confirmation dialog, per-item result reporting, and failed-items CSV export**

## Performance

- **Duration:** 20 min
- **Started:** 2026-04-03T10:00:00Z
- **Completed:** 2026-04-03T10:20:00Z
- **Tasks:** 2
- **Files modified:** 6

## Accomplishments

- TransferViewModel wires IFileTransferService.TransferAsync with source and dest contexts acquired from ISessionManager, progress reporting, cancellation, and failed-items export via BulkResultCsvExportService
- TransferView provides a left-panel layout with source/dest GroupBoxes (site URL + browse button + library/folder display), Copy/Move radio buttons, conflict policy ComboBox (Skip/Overwrite/Rename), start/cancel buttons, progress bar, result summary, and Export Failed Items button
- Added EnumBoolConverter (for RadioButton binding) and StringToVisibilityConverter (for result summary visibility) to the converters file; registered both in App.xaml resources
- Registered IFileTransferService, BulkResultCsvExportService, TransferViewModel, TransferView in App.xaml.cs DI container

## Task Commits

1. **Tasks 1 + 2: TransferViewModel + TransferView** - `7b78b19` (feat)

## Files Created/Modified

- `SharepointToolbox/ViewModels/Tabs/TransferViewModel.cs` — ViewModel with source/dest properties, RunOperationAsync calling TransferAsync, ExportFailedAsync
- `SharepointToolbox/Views/Tabs/TransferView.xaml` — UserControl XAML with DockPanel layout
- `SharepointToolbox/Views/Tabs/TransferView.xaml.cs` — Code-behind wiring SitePickerDialog + FolderBrowserDialog factories, confirm dialog
- `SharepointToolbox/Views/Converters/IndentConverter.cs` — Added EnumBoolConverter, StringToVisibilityConverter
- `SharepointToolbox/App.xaml` — Registered EnumBoolConverter, StringToVisibilityConverter, ListToStringConverter (added by linter) as static resources
- `SharepointToolbox/App.xaml.cs` — Registered IFileTransferService, BulkResultCsvExportService, TransferViewModel, TransferView

## Decisions Made

- SitePickerDialog.SelectedUrls is a list (multi-site); used `.FirstOrDefault()` in TransferView code-behind to get the single selected site for transfer — avoids creating a new single-site variant of SitePickerDialog while reusing the established pattern.
- EnumBoolConverter added alongside existing converters in IndentConverter.cs rather than a separate file, consistent with project file convention (BytesConverter, InverseBoolConverter are also in that file).
- TransferViewModel.CurrentProfile is a public read-only property (same pattern as StorageViewModel) so the code-behind can build site-specific TenantProfile for FolderBrowserDialog acquisition.

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] Adapted SitePickerDialog usage — SelectedSite vs SelectedUrls**
- **Found during:** Task 2 (TransferView code-behind)
- **Issue:** Plan referenced `sitePicker.SelectedSite` (singular property), but actual SitePickerDialog exposes `SelectedUrls` (IReadOnlyList<SiteInfo>). No SelectedSite property exists.
- **Fix:** Used `sitePicker.SelectedUrls.FirstOrDefault()` in both BrowseSource_Click and BrowseDest_Click to pick the first (or only) user selection.
- **Files modified:** SharepointToolbox/Views/Tabs/TransferView.xaml.cs
- **Verification:** Build passes with 0 errors.
- **Committed in:** 7b78b19

**2. [Rule 3 - Blocking] Added missing EnumBoolConverter and StringToVisibilityConverter**
- **Found during:** Task 2 (TransferView XAML used these converters)
- **Issue:** Plan noted converters may be missing and instructed to create them. EnumBoolConverter and StringToVisibilityConverter were not in the project.
- **Fix:** Added both converter classes to IndentConverter.cs and registered them in App.xaml.
- **Files modified:** SharepointToolbox/Views/Converters/IndentConverter.cs, SharepointToolbox/App.xaml
- **Verification:** Build passes with 0 errors; converters accessible in App.xaml.
- **Committed in:** 7b78b19

---

**Total deviations:** 2 auto-fixed (1 bug/API mismatch, 1 missing critical converters)
**Impact on plan:** Both fixes were explicitly anticipated in plan notes. No scope creep.

## Issues Encountered

- Linter auto-created a ListToStringConverter x:Key reference in App.xaml — corresponding class was added to IndentConverter.cs to satisfy the build (0 errors confirmed).

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- TransferViewModel and TransferView are ready; must be wired into MainWindow as a tab (Plan 04-09 or 04-10).
- IFileTransferService and all DI registrations are complete; TransferView can be resolved from the DI container.

---
*Phase: 04-bulk-operations-and-provisioning*
*Completed: 2026-04-03*