Deserialize JSON in Dictionary in Web Api: always empty string

Question

I have such JSON string: {"1":[1,3,5],"2":[2,5,6],"3":[5,6,8]}

I want to send it to the Web Api Controller without changing using ajax request:

$.ajax({ type: "POST", url: "Api/Serialize/Dict", data: JSON.stringify(sendedData), dataType: "json" });

In Web Api I have such method:

[HttpPost]
public object Dict(Dictionary<int, List<int>> sendedData)
{
    var d1 = Request.Content.ReadAsStreamAsync().Result;
    var rawJson = new StreamReader(d1).ReadToEnd();
    sendedData=Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<int, List<string>>>(rawJson);
    return null;
}

But rawJson always is empty string. I don't understand why? But d1.Length is the same as in JSON string. I don't know how to get JSON string from d1...

Thank you!

try using [FromBody] attribute public object Dict([FromBody] Dictionary<int, List<int>> sendedData) — Andrew
– Andrew, Commented Apr 10, 2014 at 18:37
replace type of sendedData with object and see what you indeed get there — Andrew
– Andrew, Commented Apr 10, 2014 at 18:45
use content type parameter instead of dataType when performing ajax call: contentType: "application/json; charset=utf-8" — Andrew
– Andrew, Commented Apr 10, 2014 at 18:48

Andrew · Accepted Answer · 2014-04-10 19:05:22Z

1

use content type parameter instead of dataType when performing ajax call:

$.ajax({ 
       type: "POST",
       url: "Api/Serialize/Dict", 
       contentType: "application/json; charset=utf-8", //!
       data: JSON.stringify(sendedData) 
});

answered Apr 10, 2014 at 19:05

Andrew

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