how to deserialize json with arbitrary string keys using JsonUtility(unity c#)?

Questions & Answers
1

Unity, c#, use JsonUtility. Say I have a json string as follows:

{
    "1,1":"dd",
    "2,1":"abc",
    "2,2":"123"
}

The amount and content of keys are arbitrary. How can I deserialize this json and transfer to my own class using JsonUtility.FromJson<>()?

If the keys are fixed, then I know you can make a class with variables with the name of the keys. What to do if keys are arbitrary?

5

You cannot use JsonUtility to read arbitrary keys.

You’ll have to use a library like SimpleJson.

jsonNode = JSON.Parse(jsonString);
Dictionary<string, string> branches = new Dictionary<string, string>();
foreach (string branchKey in jsonNode["branches"].Keys)
{
  branches[branchKey] = jsonNode["branches"][branchKey];
}
node.branches = branches;

note: there’s probably a better way to convert the information via branches[key] = jsonnode[branches][key] but I just wanted to post this since there wasn’t really an appropriate answer that doesn’t alter the JSON source.

2

Keys can’t be arbitrary. They need to be the names of the public variables in the class that you’re serializing.

public class MyClass
{
    public string myVar1 = "yo";
}

JSON:

{
    "myVar": "yo"
}

It looks like you’re trying to create a 2-dimensional array of strings from the JSON data. I’m not sure if unity supports that in their json, but the class structure would be:

public class MyClass 
{
     string[,] myStrings;
}

The corresponding JSON would be:

{
  "myStrings": [
    ["a", "b", "c"],
    ["d", "e", "f"],
    ["h", "i", "j"]
  ]
}

This might help you determine your JSON structure:

3

Still haven’t found a way to do this. Workaround: change the JSON structure to avoid dictionary with arbitrary keys. The dictionary mentioned in the question can be changed into:

[
    {"key":"1,1","value":"dd"},
    {"key":"2,1","value":"abc"},
    {"key":"2,2","value":"123"}
]
4

Use these tools to work with JSON Data.

6

Hii
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