如何用JSON数据递归填充TreeView [英] How to recursively populate a TreeView with JSON data

问题描述

我有一个winforms树状视图，我可以自动读取数据(一个等于key的节点，一个等于value的节点)，但是当读取对象类型时，它里面的值不会是对象节点的子对象(对象的键)，(也许我无法解释清楚，这里是屏幕截图和我的方法.)

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必须位于纹理内部，比例必须位于显示内部

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

我的杰森:

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

我的自动检测方法(实际上并非全部是我的)

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);
            }
        }

    }

我尝试过父母，但是它没有名称和值属性:S. 有什么帮助吗? (很抱歉出现语言错误)

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

推荐答案

问题是，当您递归地递减JToken层次结构时，还需要递归地递减所创建的TreeNode层次结构，并添加子节点到

The problem is that, as you recursively descend the JToken hierarchy, you also need to recursively descend the TreeNode hierarchy you are creating, adding child nodes to the parent node just created, rather than the root node, along the lines of Recursion, parsing xml file with attributes into treeview c#.

因此，如果您这样做:

    private void Form1_Load(object sender, EventArgs e)
    {
        using (var reader = new StreamReader(path))
        using (var jsonReader = new JsonTextReader(reader))
        {
            var root = JToken.Load(jsonReader);
            DisplayTreeView(root, Path.GetFileNameWithoutExtension(path));
        }
    }

    private void DisplayTreeView(JToken root, string rootName)
    {
        treeView1.BeginUpdate();
        try
        {
            treeView1.Nodes.Clear();
            var tNode = treeView1.Nodes[treeView1.Nodes.Add(new TreeNode(rootName))];
            tNode.Tag = root;

            AddNode(root, tNode);

            treeView1.ExpandAll();
        }
        finally
        {
            treeView1.EndUpdate();
        }
    }

    private void AddNode(JToken token, TreeNode inTreeNode)
    {
        if (token == null)
            return;
        if (token is JValue)
        {
            var childNode = inTreeNode.Nodes[inTreeNode.Nodes.Add(new TreeNode(token.ToString()))];
            childNode.Tag = token;
        }
        else if (token is JObject)
        {
            var obj = (JObject)token;
            foreach (var property in obj.Properties())
            {
                var childNode = inTreeNode.Nodes[inTreeNode.Nodes.Add(new TreeNode(property.Name))];
                childNode.Tag = property;
                AddNode(property.Value, childNode);
            }
        }
        else if (token is JArray)
        {
            var array = (JArray)token;
            for (int i = 0; i < array.Count; i++)
            {
                var childNode = inTreeNode.Nodes[inTreeNode.Nodes.Add(new TreeNode(i.ToString()))];
                childNode.Tag = array[i];
                AddNode(array[i], childNode);
            }
        }
        else
        {
            Debug.WriteLine(string.Format("{0} not implemented", token.Type)); // JConstructor, JRaw
        }
    }

您将获得以下树视图结构:

You will get the following tree view structure:

这篇关于如何用JSON数据递归填充TreeView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！