Error reading JObject from JsonReader Current JsonReader item is not an object StartArray Path

Question

I am working on a Windows Phone 8 1 application involving location  I am receiving Json data from my API  My API returns data that looks like           country    India        city    Mall Road  Gurgaon        area    Haryana        PLZ    122002        street            house no            POI            type    17        phone            lng   77 08972334861755       lat   28 47930118040612       formatted address    Mall Road  Gurgaon 122002  Haryana  India            country    India        city    Mall Road  Kanpur        area    Uttar Pradesh        PLZ    208004        street            house no            POI            type    17        phone            lng   80 35783410072327       lat   26 46026740300029       formatted address    Mall Road  Kanpur 208004  Uttar Pradesh  India            country    India        city    Mall Road Area  Amritsar        area    Punjab        PLZ    143001        street            house no            POI            type    17        phone            lng   74 87286686897278       lat   31 64115178002094       formatted address    Mall Road Area  Amritsar 143001  Punjab  India            country    India        city    Vasant Kunj  Mall Road Kishan Garh   New Delhi        area    Delhi        PLZ    110070        street            house no            POI            type    18        phone            lng   77 1434211730957       lat   28 51363217008815       formatted address    Vasant Kunj  Mall Road Kishan Garh   New Delhi 110070  Delhi  India       I am deserializing my Json data and putting it into a class named LocationData  When I run my code  it gives me an error      Error reading JObject from JsonReader  Current JsonReader item is not an object  StartArray  Path   Where am I going wrong  Here is my code   private async void GetAPIData                 string  serviceUrl    https   api myweblinkapiprovider v2 amp q     UserRequestedLocation          HttpClient client   new HttpClient             HttpResponseMessage responce   await client GetAsync new Uri  serviceUrl             if  responce Content    null                        var respArray   JObject Parse await responce Content ReadAsStringAsync                 JsonSerializerSettings settings   new JsonSerializerSettings                settings NullValueHandling   NullValueHandling Ignore              settings MissingMemberHandling   MissingMemberHandling Ignore              var rcvdData   JsonConvert DeserializeObject lt LocationData gt  respArray ToString    settings               UpdateMapData rcvdData               UpdateTextData rcvdData                     I also tried to use a JArray  My code is as below    private async void GetAPIData                 string  serviceUrl    https   api myweblinkprovider com v3 fun geocode amp lic key MyKey    UserRequestedLocation          HttpClient client   new HttpClient             HttpResponseMessage responce   await client GetAsync new Uri  serviceUrl             JArray arr   JArray Parse await responce Content ReadAsStringAsync              foreach  JObject obj in arr Children lt JObject gt                           JsonSerializerSettings settings   new JsonSerializerSettings                settings NullValueHandling   NullValueHandling Ignore              settings MissingMemberHandling   MissingMemberHandling Ignore              var rcvdData   JsonConvert DeserializeObject lt LocationData gt  arr ToString    settings               UpdateMapData rcvdData               UpdateTextData rcvdData                     It also gives me an error      Cannot deserialize the current JSON array  e g   1 2 3   into type  MMI SpeechRecog Model LocationData  because the type requires a JSON object  e g    name   value    to deserialize correctly

User · Accepted Answer

The first part of your question is a duplicate of Why do I get a JsonReaderException with this code?, but the most relevant part from that (my) answer is this:

[A] JObject isn't the elementary base type of everything in JSON.net, but JToken is. So even though you could say,
object i = new int[0];
in C#, you can't say,
JObject i = JObject.Parse("[0, 0, 0]");
in JSON.net.

What you want is JArray.Parse, which will accept the array you're passing it (denoted by the opening [ in your API response). This is what the "StartArray" in the error message is telling you.

As for what happened when you used JArray, you're using arr instead of obj:

var rcvdData = JsonConvert.DeserializeObject<LocationData>(arr /* <-- Here */.ToString(), settings);

Swap that, and I believe it should work.

Although I'd be tempted to deserialize arr directly as an IEnumerable<LocationData>, which would save some code and effort of looping through the array. If you aren't going to use the parsed version separately, it's best to avoid it.

User · Answer

In this case that you know that you have all items in the first place on array you can parse the string to JArray and then parse the first item using JObject Parse  var  jsonArrayString                  country      India          city      Mall Road  Gurgaon                   country      India          city      Mall Road  Kanpur            JArray jsonArray   JArray Parse jsonArrayString   dynamic data   JObject Parse jsonArray 0  ToString

User · Answer

I ran into a very similar problem with my Xamarin Windows Phone 8.1 app. The reason JObject.Parse(json) would not work for me was because my Json had a beginning "[" and an ending "]". In order to make it work, I had to remove those two characters. From your example, it looks like you might have the same issue.

jsonResult = jsonResult.TrimStart(new char[] { '[' }).TrimEnd(new char[] { ']' });

I was then able to use the JObject.Parse(jsonResult) and everything worked.

[c#] Error reading JObject from JsonReader. Current JsonReader item is not an object: StartArray. Path

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