ArrayBoard

A simple Avalonia UI project for managing and visualizing array-based data structures.

---

DESCRIPTION

ArrayBoard is a small C# / Avalonia desktop application that demonstrates working with arrays, data binding, and MVVM in a clean and modular structure.
The project was originally designed for a university task — "WPF program with arrays" — and implemented using Avalonia for cross-platform compatibility (macOS & Windows).

---

FEATURES

• Display, add, edit, and remove items in an array of objects (Car model).
• Real-time search and filtering by selected column.
• Confirmation dialog for deletions.
• Separation into layers (Models, ViewModels, Views, Services).
• Unit tests with logging for basic operations.
• Three deliberate runtime bugs for teamwork debugging practice.

---

ARCHITECTURE

ArrayBoard/
├── apps/
│   └── ArrayBoard.App/
│       ├── Models/           # Core data structures
│       ├── ViewModels/       # Business logic and binding
│       ├── Views/            # Avalonia XAML UI
│       ├── Services/         # Dialog handling
│       └── Resources/        # Localization and styles
├── tests/
│   └── ArrayBoard.Tests/     # Unit tests (with bug tracing)

---

⚙️ Technologies

• C# 12 / .NET 9
• Avalonia UI 11
• MVVM pattern
• xUnit for testing

---

KNOWN BUGS (for university teamwork task)

Bug #1 – Culture-Sensitive Price Parsing

• Symptom: Entering price with a comma in some locales (e.g., "12,50") throws FormatException.
• Repro:
  1. Add or edit a car.
  2. In "Price" field, type value with a comma (e.g., "19999,99").
  3. Click "OK" -> app crashes or shows unhandled error.
• Suspected Place: CarEditViewModel.cs, price parsing logic.

Bug #2 – Delete While Filtered

• Symptom: If you apply a filter, delete an item, then clear the filter, sometimes an ArgumentOutOfRangeException occurs or the grid index gets out of sync.
• Repro:
  1. Set filter to match a subset (e.g., Brand: "Ford").
  2. Delete the only visible row.
  3. Clear filter -> random crash or inconsistent selection.
• Suspected Place: MainViewModel.cs, remove logic vs. collection view sync.

Bug #3 – Cancel Still Saves

• Symptom: In the Edit dialog, clicking "Cancel" still commits some changes because the binding updates the model prematurely.
• Repro:
  1. Select a row, click "Edit".
  2. Change fields; click "Cancel".
  3. Observe that changes are sometimes reflected in the grid.
• Suspected Place: CarEditDialog.axaml.cs and CarEditViewModel.cs (two-way binding updates original object, no snapshot/rollback).

---

BUILD AND RUN

dotnet restore
dotnet build
dotnet run --project apps/ArrayBoard.App

---

TEST

dotnet test