Part 53 File upload in asp net core mvc
In ASP.NET Core MVC, file upload is a feature that allows users to transfer files (images, documents, or data) from a client-side device to a web server. It is primarily implemented
using the IFormFile interface, which provides a C# representation of a file sent with an HTTP request.
Core Components
IFormFile: The primary interface used in controller action methods to access uploaded files. It contains metadata like FileName, Length,
and ContentType, and methods like CopyToAsync to save the file.
Enctype "multipart/form-data": A mandatory HTML form attribute. Without this, the browser will not transmit file data to the server.
Model Binding: The process that automatically maps the uploaded file from the incoming HTTP request to an IFormFile parameter in a controller action.
Common Approaches
Buffered Uploads: Recommended for small files. The entire file is read into memory or a temporary disk file before being processed by the application.
Streaming: Recommended for large files. Files are processed directly from the request stream, which reduces server memory and disk space requirements.