When building lightweight applications, minimal APIs can simplify the hosting model, reducing dependencies and complexity.

To start working with our example project, we’ll begin by creating a new ASP.NET Core Web API application. You can do this by launching Visual Studio 2022 and clicking on the ‘Create New Project’ button. From there, choose the ‘ASP.NET Core Web Application’ template and select ‘.NET 6 (Long-term support)’ as the framework.

Handling File Uploads with IFormFile

In this example, we’ll use the IFormFile class to handle file uploads. This class represents a single uploaded file and provides properties like Name, Length, and ContentType. To use IFormFile, we need to add it as a parameter in our API endpoint.

For instance, let’s say we have an API endpoint for uploading profile pictures. We can add the IFormFile parameter like this: `public async Task UploadProfilePicture(IFormFile file)`

Working with Multiple Files using IFormFileCollection

When handling multiple file uploads, we use the IFormFileCollection class. This collection allows us to access all uploaded files and provides the same properties as IFormFile. We can add it as a parameter in our API endpoint like this: `public async Task UploadMultipleFiles(IFormFileCollection files)`

To handle multiple file uploads, we’ll iterate through the collection and process each file individually. This way, we can handle files with different names, lengths, and content types.

Conclusion

In this article, we explored how to handle file uploads using IFormFile and IFormFileCollection in the context of minimal APIs. By following these steps, you should be able to create a simple API for uploading files. Remember to always keep your code organized and clean, and don’t hesitate to ask for help if you’re stuck.

Inspired by

• https://www.infoworld.com/article/4036032/how-to-upload-files-using-minimal-apis-in-asp-net-core.html

Sources

• microsoft.com