Implementing File Uploads in ASP.NET Core Minimal APIs

When to Use

• File upload endpoints in ASP.NET Core minimal APIs (.NET 8+)
• Handling IFormFile or IFormFileCollection parameters
• When you need size limits, content type validation, or streaming large files

When Not to Use

• MVC controllers → [FromForm] IFormFile works directly with attributes
• Simple JSON body → no file upload needed
• Very large files (> 1GB) → use streaming with MultipartReader instead

Inputs