Passing multiple parameters to client.PostAsJsonAsync function

Question

I am currently posting to my web api like this:

client.PostAsJsonAsync("api/controller/methodincontroller", listOfProductObject);

I would like to know how in addition to the list of my Product object I can also send an additional string to the method in my controller without making it a property of my Product model.

If this isn't possible I will have to make a Model that has 2 properties for this purpose only:

IList<Product> productList
string additionalParam

Yes for example: public HttpResponseMessage MyMethod(IList<Product> productList, string additionalParam). But how would I fill this param from my other application when calling PostAsJsonAsync. — William Venice
– William Venice, Commented Oct 9, 2015 at 14:14
you could append one to the URI ie api/controller?additionalParam=something and the other using from body attribute. asp.net/web-api/overview/formats-and-model-binding/…, so it would look like: client.PostAsJsonAsync("api/controller/methodincontroller?additionalParam=" + myParam, listOfProductObject); — Ric
– Ric, Commented Oct 9, 2015 at 14:20
So on the receiving end how would my method declaration look? Which param comes first and do I have to change any of my route settings? — William Venice
– William Venice, Commented Oct 9, 2015 at 14:28
See below, note that I am not using PostAsJsonAsync, but the idea is the same. — Ric
– Ric, Commented Oct 9, 2015 at 14:52

Ric · Accepted Answer · 2015-10-09 14:46:15Z

4

Ok so I got a sample working without using PostAsJsonAsync:

The setup:

string json = JsonConvert.SerializeObject(new List<somemodel> { new somemodel() });
StringContent sc = new StringContent(json, Encoding.UTF8, "application/json");

HttpClient c = new HttpClient(new HttpClientHandler { UseDefaultCredentials = true });
var x = c.PostAsync("http://localhost:58893/api/values?additionalParam=" + "test", sc).Result; // returns 200

And the controller:

public IHttpActionResult Post([FromUri] string additionalParam, [FromBody] List<somemodel> models)

Obviously this works for my sample objects somemodel but you get the idea.

answered Oct 9, 2015 at 14:46

Ric

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2 Comments

William Venice Over a year ago

This works perfect. My controller code looks exactly like yours, but the code in the setup section is like this: Task<HttpResponseMessage> response = client.PostAsJsonAsync("api/mycontroller/controllermethod?additionalParam=" + "test", productList); Is there any particular reason you added additional code in the setup section? I am pretty sure my productList automatically gets converted to Json when sent. In the debugger what I currently have seems to be working.

Ric Over a year ago

Yeah because I don't seem to have PostAsJsonAsync and nuget isn't allowing me to get it for some reason at the moment, I just added some code to get it working and to pass in the json, but it's basically the same thing!

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