405 method not allowed Web API

Question

This error is very common, and I tried all of the solutions and non of them worked. I have disabled WebDAV publishing in control panel and added this to my web config file:

  <handlers>
  <remove name="WebDAV"/>
  </handlers>
  <modules runAllManagedModulesForAllRequests="true">
  <remove name="WebDAVModule"/>
  </modules>

The error still persists. This is the controller:

   static readonly IProductRepository repository = new ProductRepository();

    public Product Put(Product p)
    {
        return repository.Add(p);
    }

Method implementation:

 public Product Add(Product item)
    {
        if (item == null)
        {
            throw new ArgumentNullException("item");
        }
        item.Id = _nextId++;
        products.Add(item);
        return item;
    }

And this is where the exception is thrown:

client.BaseAddress = new Uri("http://localhost:5106/");
client.DefaultRequestHeaders.Accept.Add(
new MediaTypeWithQualityHeaderValue("application/json"));      
var response = await client.PostAsJsonAsync("api/products", product);//405 exception

Any suggestions?

Answer 1

You are POSTing from the client:

await client.PostAsJsonAsync("api/products", product);

not PUTing.

Your Web API method accepts only PUT requests.

So:

await client.PutAsJsonAsync("api/products", product);