WinFrom Json数据绑定TreeView控件核心代码

Windows Forms中绑定Json到TreeView控件实践

最新推荐文章于 2022-06-06 14:34:58 发布

原创最新推荐文章于 2022-06-06 14:34:58 发布 · 3.8k 阅读

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本文介绍如何使用Newtonsoft.Json库将Json数据绑定到WinForms的TreeView控件，实现数据可视化展示。

需要引用Newtonsoft.Json.dll

 private void button2_Click(object sender, EventArgs e)
        {
            //{\"id\":\"329\",\"txt\":\"IT\"}
            string json = "[{\"Groupid\": \"1\",\"groupnum\": \"9005\",\"groupname\": \"调度中心\",\"type\": \"1\",\"dnsprefix\": \"\",\"islocal\": \"1\",\"canshowall\": \"0\",\"user\": [],\"group\": [{\"Groupid\": \"54\",\"groupnum\": \"66000\",\"groupname\": \"大唐移动\",\"type\": \"0\",\"dnsprefix\": \"\",\"islocal\": \"1\",\"canshowall\": \"1\",\"user\": [],\"group\": [{\"Groupid\": \"55\",\"groupnum\": \"67000\",\"groupname\": \"大唐移动1\",\"type\": \"1\",\"dnsprefix\": \"\",\"islocal\": \"1\",\"canshowall\": \"1\",\"user\": [],\"group\": []}]		},{\"Groupid\": \"66\",\"groupnum\": \"66000\",\"groupname\": \"大唐联通\",\"type\": \"0\",\"dnsprefix\": \"\",\"islocal\": \"1\",\"canshowall\": \"1\",\"user\": [],\"group\": [{\"Groupid\": \"67\",\"groupnum\": \"67000\",\"groupname\": \"大唐联通1\",\"type\": \"1\",\"dnsprefix\": \"\",\"islocal\": \"1\",\"canshowall\": \"1\",\"user\": [],\"group\": []}]		}]}]";

            BindTreeView(treeView,json);
        }

 /// <summary>
        /// 绑定树形控件
        /// </summary>
        /// <param name="treeView"></param>
        /// <param name="strJson"></param>
        public void BindTreeView(TreeView treeView, string strJson)
        {
            treeView.Nodes.Clear();

            if (IsJOjbect(strJson))
            {
                JObject jo = (JObject)JsonConvert.DeserializeObject(strJson);

                foreach (var item in jo)
                {
                    TreeNode tree;
                    if (item.Value.GetType() == typeof(JObject))
                    {
                        tree = new TreeNode(item.Key);
                        AddTreeChildNode(ref tree, item.Value.ToString());
                        treeView.Nodes.Add(tree);
                    }
                    else if (item.Value.GetType() == typeof(JArray))
                    {
                        tree = new TreeNode(item.Key);
                        AddTreeChildNode(ref tree, item.Value.ToString());
                        treeView.Nodes.Add(tree);
                    }
                    else
                    {
                        tree = new TreeNode(item.Key + ":" + item.Value.ToString());
                        treeView.Nodes.Add(tree);
                    }
                }
            }
            if (IsJArray(strJson))
            {
                JArray ja = (JArray)JsonConvert.DeserializeObject(strJson);
                int i = 0;
                foreach (JObject item in ja)
                {
                    TreeNode tree = new TreeNode();
                    foreach (var itemOb in item)
                    {
                        TreeNode treeOb;
                        if (itemOb.Value.GetType() == typeof(JObject))
                        {
                            treeOb = new TreeNode(itemOb.Key);
                            AddTreeChildNode(ref treeOb, itemOb.Value.ToString());
                            tree.Nodes.Add(treeOb);

                        }
                        else if (itemOb.Value.GetType() == typeof(JArray))
                        {
                            treeOb = new TreeNode(itemOb.Key);
                            AddTreeChildNode(ref treeOb, itemOb.Value.ToString());
                            tree.Nodes.Add(treeOb);
                        }
                        else
                        {
                            treeOb = new TreeNode(itemOb.Key + ":" + itemOb.Value.ToString());
                            tree.Nodes.Add(treeOb);
                        }
                    }
                    treeView.Nodes.Add(tree);
                }
            }
            treeView.ExpandAll();
        }
        /// <summary>
        /// 添加子节点
        /// </summary>
        /// <param name="parantNode"></param>
        /// <param name="value"></param>
        public void AddTreeChildNode(ref TreeNode parantNode, string value)
        {
            if (IsJOjbect(value))
            {
                JObject jo = (JObject)JsonConvert.DeserializeObject(value);
                foreach (var item in jo)
                {
                    TreeNode tree;
                    if (item.Value.GetType() == typeof(JObject))
                    {
                        tree = new TreeNode(item.Key);
                        AddTreeChildNode(ref tree, item.Value.ToString());
                        parantNode.Nodes.Add(tree);
                    }
                    else if (item.Value.GetType() == typeof(JArray))
                    {
                        tree = new TreeNode(item.Key);
                        AddTreeChildNode(ref tree, item.Value.ToString());
                        parantNode.Nodes.Add(tree);
                    }
                    else
                    {
                        tree = new TreeNode(item.Key + ":" + item.Value.ToString());
                        parantNode.Nodes.Add(tree);
                    }
                }
            }
            if (IsJArray(value))
            {
                JArray ja = (JArray)JsonConvert.DeserializeObject(value);
                int i = 0;
                foreach (JObject item in ja)
                {
                    TreeNode tree = new TreeNode();
                    parantNode.Nodes.Add(tree);
                    foreach (var itemOb in item)
                    {
                        TreeNode treeOb;
                        if (itemOb.Value.GetType() == typeof(JObject))
                        {
                            treeOb = new TreeNode(itemOb.Key);
                            AddTreeChildNode(ref treeOb, itemOb.Value.ToString());
                            tree.Nodes.Add(treeOb);

                        }
                        else if (itemOb.Value.GetType() == typeof(JArray))
                        {
                            treeOb = new TreeNode(itemOb.Key);
                            AddTreeChildNode(ref treeOb, itemOb.Value.ToString());
                            tree.Nodes.Add(treeOb);
                        }
                        else
                        {
                            treeOb = new TreeNode(itemOb.Key + ":" + itemOb.Value.ToString());
                            tree.Nodes.Add(treeOb);
                        }
                    }
                }
            }
        }
        /// <summary>
        ///  判断是否JOjbect类型
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public bool IsJOjbect(string value)
        {
            try
            {
                JObject ja = JObject.Parse(value);
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
        }
        /// <summary>
        /// 判断是否JArray类型
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public bool IsJArray(string value)
        {
            try
            {
                JArray ja = JArray.Parse(value);
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
        }