How to pass string parameter to DELETE WebAPI endpoint

Question

When creating a new ASP.net WebAPi Rest controller, visual studio adds a DELETE action like this

// DELETE: api/foo/5
public void Delete(int id)
{
}

And I can successfully call that endpoint

But the 'id' in my system are string hashes so I need to pass the 'id' as a string not an int e.g

// DELETE: api/foo/58c75babbf61cda99c84af8b
public void Delete(string id)
{
}

But when I change this, the DELETE action no longer is called and I get the error "No HTTP resource was found that matches the request URI "

Any ideas why? and how do get around this?

this is a route config issue. show how you configured routes. provide minimal reproducible example that can be used to reproduce the problem. — Nkosi
– Nkosi, Commented Mar 20, 2017 at 22:58

Akos Nagy · Accepted Answer · 2017-03-22 20:46:41Z

5

You can specify the route template yourself, and in it, specify that id is a guid:

[HttpDelete, Route("api/foo/{id}")]
public void Delete(string id)
{
}

edited Mar 22, 2017 at 20:46

answered Mar 20, 2017 at 22:54

Akos Nagy

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4 Comments

MakkyNZ Over a year ago

But the Id is not a guid. It's just a string.

Akos Nagy Over a year ago

OK, I see. Sorry for the misunderstanding, see my edited answer.

MakkyNZ Over a year ago

Your edit doesn't work either, but what does work is if the attribute looks like this [HttpDelete, Route("api/foo/{id}")]

Akos Nagy Over a year ago

I checked the documentation. Unfortunately alpha really means 'alpha' and not 'alphanumberic', so numbers are out... But I guess we could still use the regex route constraint like this {id:regex(^[a-zA-Z0-9]+$)}. This should match any number of alphanumeric character. But if it works just by specifying the type, I guess that's the best solution :) Thanks for the educational question and sharing the answer.

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