Web Reference: By Tim Deschryver and Rick Anderson This tutorial teaches the basics of building a controller-based web API that uses a database. Another approach to creating APIs in ASP.NET Core is to create Minimal APIs. For help with choosing between Minimal APIs and controller-based APIs, see APIs overview. Apr 4, 2017 · In my case I needed to render an Excel in memory and return it for download, so I needed to define a file name with extension as well: return File(stream, "application/octet-stream", "filename.xlsx"); This way when it downloads the user can open it directly. Nov 12, 2025 · Learn ASP.NET Core essentials for modern Web APIs on .NET 8—minimal APIs, controllers, DI, auth, EF Core, and deployment. Build a complete Todo API.
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