PUT API in ASP.NET — a practical guide to ASP.NET PUT API with clear examples you can reuse in real projects.
ASP & ASP.NET Tutorial Series (155/247). Prefer one article? Read the complete ASP.NET tutorial.
Short description
Return 404 if the target does not exist (or upsert by design).
PUT
[HttpPut("{id:int}")]
public async Task<IActionResult> Update(int id, ItemUpdateDto dto) { /* ... */ return NoContent(); }