How to recursively populate a TreeView with JSON data

Question

I have a winforms treeview, I can read data automatically, (a node that is equal to key, and a node inside that is equal to value), but when reading object type, the values inside it are not going to be child of object node (key of object), (maybe I couldnt explain well, here is a screenshot and my methods.)

layer0 needs to be inside textures and scale needs to be inside display

My Json:

{
"parent": "builtin/generated",
"textures": {
    "layer0": "mm:items/iron_dust"
},
"display": {       
        "scale": [ 1.7, 1.7, 1.7 ]
 }
}

My method to auto detect(not all mine actually)

private void Form1_Load(object sender, EventArgs e)
    {
        StreamReader reader = new StreamReader(path);
        string json = reader.ReadToEnd();
        reader.Close();
        JObject obj = JObject.Parse(json);
        getAllProperties(obj);
    }

    void getAllProperties(JToken children)
    {
        TreeNode mainNode = treeView1.Nodes[0];
        mainNode.Text = Path.GetFileNameWithoutExtension(path);
        foreach (JToken child in children.Children())
        {
            var property = child as JProperty;
            if (property != null)
            {
                if (property.Value.Type == JTokenType.String)
                {
                    TreeNode keyNode = mainNode.Nodes.Add(property.Name);
                    keyNode.Nodes.Add(property.Value.ToString());
                }
                if (property.Value.Type == JTokenType.Array)
                {
                    JArray array = (JArray)property.Value;
                    TreeNode node = mainNode.Nodes.Add(property.Name);
                    for (int i = 0; i < array.Count; i++)
                    {
                        node.Nodes.Add(array[i].ToString());
                    }
                }
                if (property.Value.Type == JTokenType.Object)
                {
                    TreeNode topNode = mainNode.Nodes.Add(property.Name.ToString());
                    foreach (var item in property)
                    {
                        if (item.Type == JTokenType.String)
                        {
                             if (property.Value.Type == JTokenType.String)
                {
                    TreeNode keyNode = topNode.Nodes.Add(property.Name);
                    keyNode.Nodes.Add(property.Value.ToString());
                }
                if (property.Value.Type == JTokenType.Array)
                {
                    JArray array = (JArray)property.Value;
                    TreeNode node = topNode.Nodes.Add(property.Name);
                    for (int i = 0; i < array.Count; i++)
                    {
                        node.Nodes.Add(array[i].ToString());
                    }
                }
                        }
                    }
                }


                    // Console.WriteLine(property.Name + ":" + property.Value);//print all of the values
                }
                getAllProperties(child);
            }
        }

    }

I tried to get parent, but it didnt have name and value properties :S. Any help? (Sorry for language mistakes)

Answer 1

Here is my crack at it. The output is identical to Notepad++'s JSTool plug-in:

The code is structured as a TreeView extension:

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System.Collections.Generic;
using System.Windows.Forms;

namespace TestDLApp.Utilities.Extensions
{
    public static class ObjectToTreeView
    {
        private sealed class IndexContainer
        {
            private int _n;
            public int Inc() => _n++;
        }

        private static void FillTreeView(TreeNode node, JToken tok, Stack<IndexContainer> s)
        {
            if (tok.Type == JTokenType.Object)
            {
                TreeNode n = node;
                if(tok.Parent != null)
                {
                    if(tok.Parent.Type == JTokenType.Property)
                    {
                        n = node.Nodes.Add($"{((JProperty)tok.Parent).Name} <{tok.Type.ToString()}>");
                    }
                    else
                    {
                        n = node.Nodes.Add($"[{s.Peek().Inc()}] <{tok.Type.ToString()}>");
                    }
                }
                s.Push(new IndexContainer());
                foreach (var p in tok.Children<JProperty>())
                {
                    FillTreeView(n, p.Value, s);
                }
                s.Pop();
            }
            else if (tok.Type == JTokenType.Array)
            {
                TreeNode n = node;
                if(tok.Parent != null)
                {
                    if (tok.Parent.Type == JTokenType.Property)
                    {
                        n = node.Nodes.Add($"{((JProperty)tok.Parent).Name} <{tok.Type.ToString()}>");
                    }
                    else
                    {
                        n = node.Nodes.Add($"[{s.Peek().Inc()}] <{tok.Type.ToString()}>");
                    }
                }
                s.Push(new IndexContainer());
                foreach (var p in tok)
                {
                    FillTreeView(n, p, s);
                }
                s.Pop();
            }
            else
            {
                var name = string.Empty;
                var value = JsonConvert.SerializeObject(((JValue)tok).Value);

                if (tok.Parent.Type == JTokenType.Property)
                {
                    name = $"{((JProperty)tok.Parent).Name} : {value}";
                }
                else
                {
                    name = $"[{s.Peek().Inc()}] : {value}";
                }

                node.Nodes.Add(name);
            }
        }

        public static void SetObjectAsJson<T>(this TreeView tv, T obj)
        {
            tv.BeginUpdate();
            try
            {
                tv.Nodes.Clear();

                var s = new Stack<IndexContainer>();
                s.Push(new IndexContainer());
                FillTreeView(tv.Nodes.Add("ROOT"), JsonConvert.DeserializeObject<JToken>(JsonConvert.SerializeObject(obj)), s);
                s.Pop();
            }
            finally
            {
                tv.EndUpdate();
            }
        }
    }
}

You can call it as so:

treeView1.SetObjectAsJson(new MyNeatObject());