Pass LIST object by Rest API Client to Web API 2 using JSON

Question

I have a problem in pass data list from Client to the Web API 2 by JSON. Here are my code samples

Client

string RestUrl = "http://***SrviceUrl***/api/InvoiceHeader/{0}";

var uri = new Uri(string.Format(RestUrl, string.Empty));

List<InvItem> myList = new List<InvItem>(Common.invitems);

var json = JsonConvert.SerializeObject(myList);
var content = new StringContent(json, Encoding.UTF8, "application/json");           
HttpResponseMessage response = null;
response = await client.PutAsync(uri ,content);

if (response.IsSuccessStatusCode)
       {
         Debug.WriteLine(@"successfully saved.");
       }

Web Service - Controller class

    [HttpPut]
    [BasicAuthentication(RequireSsl = false)]
    public HttpResponseMessage Put(string item)
    {
        List<InvItemToSave> myList = new List<InvItemToSave>();
        myList = JsonConvert.DeserializeObject<List<InvItemToSave>>(item);

        try
        {
            todoService.InsertInvoiceDetail(myList);
        }
        catch (Exception)
        {
            return base.BuildErrorResult(HttpStatusCode.BadRequest, ErrorCode.CouldNotCreateItem.ToString());
        }

        return base.BuildSuccessResult(HttpStatusCode.Created);
    }

when i try to pass single data object to same controller it works fine. but for LIST objects it returns error code.

StatusCode: 405, ReasonPhrase: 'Method Not Allowed'

I tried to pass exact same * list content* through third party REST client . It returned success code.

Answer 1

You are doing a PutAsync into a HttpPost action. Your api URL looks incorrect as well, should be,

http://***SrviceUrl***/api/InvoiceHeader

and action should be,

public HttpResponseMessage Put(List<InvItem> items)