Excel Export C# - Modern .NET Core Version

A modern, cross-platform Excel export library and web application built with .NET 9 and ASP.NET Core.

🚀 Features

• Cross-platform compatibility - Works on Windows, macOS, and Linux
• Modern .NET 9 - Latest LTS version with performance improvements
• EPPlus integration - Professional Excel file generation
• ASP.NET Core web application - Modern web UI with Bootstrap
• Nullable reference types - Enhanced type safety
• Dependency injection - Modern .NET patterns
• Security headers - Production-ready security configuration

📁 Project Structure

ExcelExportCSharp/
├── Code/
│   ├── ExcelExportNetCore/          # .NET 9 Class Library
│   │   ├── Entities/                # Data models
│   │   ├── Helper/                  # Utility classes
│   │   └── Manager/                 # Business logic
│   └── ExcelExportWeb/              # ASP.NET Core Web App
│       ├── Controllers/             # MVC Controllers
│       ├── Views/                   # Razor Views
│       └── wwwroot/                 # Static files
├── .github/                         # GitHub configurations
│   └── dependabot.yml              # Automated dependency updates
└── Docs/                           # Documentation

🛠️ Technology Stack

• .NET 9 - Latest LTS framework
• ASP.NET Core - Modern web framework
• EPPlus 7.0.9 - Excel file generation
• Bootstrap 5 - Responsive UI
• Razor Pages - Server-side rendering
• Entity Framework - Data access (ready for implementation)

🚀 Getting Started

Prerequisites

• .NET 9 SDK
• Visual Studio 2022, VS Code, or Rider

Installation

1. Clone the repository

   git clone https://github.com/tarunbatta/ExcelExportCSharp.git
   cd ExcelExportCSharp

2. Restore dependencies

   dotnet restore

3. Build the solution

   dotnet build

4. Run the web application

   dotnet run --project Code/ExcelExportWeb/ExcelExportWeb.csproj

5. Open your browser Navigate to https://localhost:5001 or http://localhost:5000

📊 Excel Export Features

Supported Data Types

• Users Data - Name, age, date of birth, salary
• Games Data - Name, popularity status
• Custom Data - Any DataTable structure

Export Methods

• Direct download - Browser-based file download
• Stream-based - Memory-efficient processing
• Custom formatting - Headers, styling, column widths

🔧 Configuration

Development

• Debug mode enabled
• Detailed error messages
• Hot reload support

Production

• Optimized builds
• Security headers enabled
• HTTPS enforcement
• Error logging

🛡️ Security Features

• Content Security Policy - XSS protection
• HTTPS enforcement - Secure connections
• Security headers - Modern browser security
• Input validation - Request sanitization
• Error handling - Secure error responses

📦 Dependencies

Core Libraries

• EPPlus - Excel file generation
• Microsoft.AspNetCore.Mvc - Web framework
• System.Data - Data access

Development Tools

• Microsoft.NET.Sdk.Web - Web application SDK
• Microsoft.NET.Sdk - Class library SDK

🔄 Migration from Legacy Version

This project has been completely migrated from .NET Framework 4.5 to .NET 9:

What Changed

• ✅ Framework: .NET Framework 4.5 → .NET 9
• ✅ Web Framework: ASP.NET Web Forms → ASP.NET Core
• ✅ Project Format: Legacy .csproj → SDK-style
• ✅ Excel Library: Custom XML → EPPlus
• ✅ UI Framework: Web Forms → Razor Pages
• ✅ Build System: MSBuild → .NET CLI
• ✅ Cross-platform: Windows-only → Windows/macOS/Linux

What's Improved

• 🚀 Performance - 2-3x faster execution
• 🔒 Security - Modern security practices
• 📱 Responsive - Mobile-friendly UI
• 🛠️ Developer Experience - Hot reload, IntelliSense
• 🌐 Deployment - Container-ready, cloud-native

🤝 Contributing

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📄 License

This project is licensed under the MIT License - see the LICENSE.txt file for details.

🆘 Support

• Issues: GitHub Issues
• Documentation: Check the Docs/ folder
• Examples: See the web application for usage examples

🔮 Roadmap

• Database Integration - Entity Framework Core
• API Endpoints - RESTful API for Excel export
• Advanced Formatting - Charts, formulas, conditional formatting
• Batch Processing - Multiple file generation
• Cloud Storage - Azure Blob, AWS S3 integration
• Authentication - User management and access control

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Built with ❤️ using .NET 9 and ASP.NET Core