How to access Json data without unknown key?

Question

public static string RESTToJsonConverter(string incoming_data){
    string data = "[";
    int i = 0;
    Debug.Log("incoming_data"+incoming_data);
          


        

Answer 1

For your specific case I would go the other way round:

The root field name usually doesn't matter so if you remove the trailing } and start the string from the second { you would have

{
    "assetName": "avatar",
    "id": "-M4qRmfnFya7bC43Ujye",
    "imageName": "icon_avatar",
    "name": "Bob",
    "objName": "Bobby",
    "point": "-M4vZRY9vhKs65n5L_Gk",
    "versionNumber": "3"
}

which you can simply create a c# class for

[Serializable]
public class Data
{
    public string assetName;
    public string id;
    public string imageName;
    public string name;
    public string objName;
    public string point;
    public string versionNumber;
}

and then you could use JsonUtility

public static Data RESTToJsonConverter(string incoming_data)
{
    Debug.Log($"incoming_data:/n{incoming_data}");

    // remove everything before the SECOND occurrence of '{'
    // remove last occurrence of '}'
    var startIndex = incoming_data.IndexOf('{', incoming_data.IndexOf('{') + 1);
    var endIndex = incoming_data.LastIndexOf('}') - 1;
    var json = incoming_data.Substring(startIndex, endIndex - startIndex);

    // then remove leading or trailing whitespace
    json = json.Trim();
    
    Debug.Log($"json:/n{json}");
   
    var data = JsonUtility.FromJson(json);

    return data;
}

---

Update

You now updated your question content so now the data comes as a Dictionary of data objects.

In this case you could use Newtonsoft Json.NET which directly supports (de)serialization of Dictionary like e.g.

[Serializable]
public class Data
{
    public string assetName;
    public string id;
    public string imageName;
    public string name;
    public string objName;
    public string point;
    public string versionNumber;
}

and then do something like

public static Dictionary RESTToJsonConverter(string incoming_data)
{
    Debug.Log($"incoming_data:/n{incoming_data}");
   
    var data = JsonConvert.DeserializeObject(json);

    return data;
}

then you can do e.g.

var datas = RESTToJsonConverter(receivedRawData);
foreach(var data in data.Values)
{
    Debug.Log(data.id);
}