Modifying Json file values

Questions & Answers
1

I am making a simple character customization element for my game, and I made a Json database for the items.

[ { "id": 1, "name": "hat", "key": "Hat01", "price": 10, "available": false }, { "id": 2, "name": "hat2", "key": "Hat02", "price": 80, "available": false },

I can pull out the data and put it into a shop screen, but when the player buys an item, I would like to change the “available” variable to be true and save it so everytime I pull information from Json, that hat is available.
How can I achieve this? Something to overwrite just one line of the Json file.

Thank you in advance.

2

you dont edit json files. you store data as json, and then read it into data structures. if youre trying to edit a json file then stop. Javascript object notation is for storage and transfer, not manipulation when in a proper OO environment. maybe web coders do that, but full OO coding should deserialize a JSON string into a data structure for manipulation.

when you’ve made a data structure that holds that object, then its easy. which I’ll assume is called dataset and represents a list holding stockItem

then you could do something like

 // assuming you have access to use System.Linq for the funky list and find; becusae, you should, its great
   List <stockItem> stock = new List<stockItem>();
   // deserialize your json into that list and then manipulate
   stockItem item = stock.find(x => x.id == "1");
   item.available = false;

and then serialize that back to a file

3

Thank you, I figured it out, I replaced the whole json text instead of only one line, thus updating the information.
Here is the code for anyone interested:

 string json;
            json = ("[");
            for (int i = 0; i < itemData.Count; i++)
            {
                NewitemData = JsonMapper.ToJson(itemData*);*

if(i== itemData.Count-1)
{
json = (json + NewitemData.ToString());
}
else
{
json = (json + NewitemData.ToString()+ “,”);
}
}
json = (json + “]”);

File.WriteAllText(Application.dataPath + “/Resources/Items.json”, json);

This works if you want to turn lists into json format.