Getting an error "Cannot deserialize the current JSON array" when deserializing using Json.Net

Question

I have a string:

[
  {
    "key": "key1",
    "value": "{'Time':'15:18:42','Data':'15:18:42'}",
    "duration": 5
  },
  {
    "key": "key1",
    "value": "{'Time':'15:18:42','Data':'15:18:42'}",
    "duration": 5
  }
]

My class in Models:

public class CPacket
{
    public string key { get; set; }
    public string value { get; set; }
    public int duration { get; set; }
}

I use Json.Net, I want to convert string bellow to Json Oject.

CPacket c = JsonConvert.DeserializeObject<CPacket>(strPostData);

But it error:

An exception of type 'Newtonsoft.Json.JsonSerializationException' occurred in Newtonsoft.Json.dll but was not handled in user code
Additional information: Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'QuoteAPI.Models.CPacket' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.

Answer 1

Your JSON represents an array of CPacket objects, not just a single object. You need to deserialize into a list.

List<CPacket> list = JsonConvert.DeserializeObject<List<CPacket>>(strPostData);