Swap json array index

Question

{"data": [
  {
     "id": "X12",
     "from": {
        "name": "test1", "id": "1458633"
     }
  },
  {
     "id": "X45",
     "from": {
        "name": "test2", "id": "12587521"
     }

  },
  {
     "id": "X46",
     "from": {
        "name": "test3", "id": "12587521"
     }

  }

I want to swap the array index of the json file using C#. Ex. data[2] swap with data[3] ->

{"data": [
  {
     "id": "X46",
     "from": {
        "name": "test3", "id": "12587521"
     }

  },
  {
     "id": "X45",
     "from": {
        "name": "test2", "id": "12587521"
     }

  }

Are there anyway to do this without creating many temp variables?

Selim Yildiz · Answer 1 · 2019-12-31T05:26:39.200

1

You can use this extension method with using JArray

public static void SwapValues(this JArray source, Int32 index1, Int32 index2)
{
    JToken temp = source[index1];
    source[index1] = source[index2];
    source[index2] = temp;
}

Then implementation just like this:

JArray jsonArray = JArray.Parse(json);
jsonArray.SwapValues(2, 1);

edited Dec 31 '19 at 05:26

answered Dec 31 '19 at 05:21

Selim Yildiz

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The approach that @SelimYıldız shared can help swap two array items, why got a votedown without any useful comment. – Fei Han Jan 01 '20 at 06:11

score 0 · Answer 2 · answered Jan 01 '20 at 06:11

I want to swap the array index of the json file using C#. Ex. data[2] swap with data[3]

You can try the following approach to achieve the requirement.

JObject myobj = JObject.Parse(jdata);

//add the second item of array after the third item

((JArray)myobj["data"])[2].AddAfterSelf(((JArray)myobj["data"])[1]);

//then remove the second item
((JArray)myobj["data"])[1].Remove();

//and now, data[2] swap with data[3]

Test Result

Swap json array index

2 Answers2