How can I merge two JObject? [duplicate]

Question

I have a first json:

{
    "data": [{
      "id": "id1",
      "field": "field1"
    }],
    "paging": {
        "prev": "link1",
    }
}

and a second one:

{
    "data": [{
      "id": "id2",
      "field": "field2"
    }],
    "paging": {
        "prev": "link2",
    }
}

and I want to merge/union the two Data array, such as:

{
    "data": [{
      "id": "id1",
      "field": "field1"
    },
    {
      "id": "id2",
      "field": "field2"
    }]  
}

(I don't care about about paging right now).

How can I do it quick and easy? This is my try:

var final = JsonConvert.SerializeObject(new { data = json1["data"].Union(json2["data"]) }, Newtonsoft.Json.Formatting.Indented).ToString();

but an Exception is raised: 'Newtonsoft.Json.Linq.JArray' does not contains a definition of 'Union'

Answer 1

Newtonsoft.Json now supports merging objects (old link):

var dataObject1 = JObject.Parse(@"{
    ""data"": [{
        ""id"": ""id1"",
        ""field"": ""field1""
    }],
    ""paging"": {
        ""prev"": ""link1"",
    }
}");
var dataObject2 = JObject.Parse(@"{
    ""data"": [{
        ""id"": ""id2"",
        ""field"": ""field2""
    }],
    ""paging"": {
        ""prev"": ""link2"",
    }
}");

var mergeSettings = new JsonMergeSettings
{
    MergeArrayHandling = MergeArrayHandling.Union
};

// method 1
(dataObject1.SelectToken("data") as JArray).Merge(dataObject2.SelectToken("data"), mergeSettings);
// method 2
//dataObject1.Merge(dataObject2, mergeSettings);
    
var mergedArray = dataObject1.SelectToken("data") as JArray;
    
Console.WriteLine(mergedArray.ToString(Formatting.None));

(checked with brain-compiler ;) )

Answer 2

JArray dataOfJson1=json1.SelectToken("data");

JArray dataofJson2=json2.SelectToken("data");

foreach(JObject innerData in dataofJson2) 
{
    dataOfJson1.Add(innerData);
}