code/Athena0.0.1/common/Util/WebControl/TreeView/TreeView.cs

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using System.Collections.Generic;
using System.Text;

namespace Athena.common.Util.WebControl
{
    public static class TreeView
    {
        public static string TreeViewJson(this List<TreeViewModel> data, string parentId = null)
        {
            StringBuilder strJson = new StringBuilder();
            List<TreeViewModel> item = data.FindAll(t => t.parentId == parentId);
            strJson.Append("[");
            if (item.Count > 0)
            {
                foreach (TreeViewModel entity in item)
                {
                    strJson.Append("{");
                    strJson.Append("\"id\":\"" + entity.id + "\",");
                    strJson.Append("\"text\":\"" + entity.text.Replace("&nbsp;", "") + "\",");
                    strJson.Append("\"value\":\"" + entity.value + "\",");
                    if (entity.title != null && !string.IsNullOrEmpty(entity.title.Replace("&nbsp;", "")))
                    {
                        strJson.Append("\"title\":\"" + entity.title.Replace("&nbsp;", "") + "\",");
                    }
                    if (entity.img != null && !string.IsNullOrEmpty(entity.img.Replace("&nbsp;", "")))
                    {
                        strJson.Append("\"img\":\"" + entity.img.Replace("&nbsp;", "") + "\",");
                    }
                    if (entity.checkstate != null)
                    {
                        strJson.Append("\"checkstate\":" + entity.checkstate + ",");
                    }
                    if (entity.parentId != null)
                    {
                        strJson.Append("\"parentnodes\":\"" + entity.parentId + "\",");
                    }
                    strJson.Append("\"showcheck\":" + entity.showcheck.ToString().ToLower() + ",");
                    strJson.Append("\"isexpand\":" + entity.isexpand.ToString().ToLower() + ",");
                    if (entity.complete == true)
                    {
                        strJson.Append("\"complete\":" + entity.complete.ToString().ToLower() + ",");
                    }
                    strJson.Append("\"hasChildren\":" + entity.hasChildren.ToString().ToLower() + ",");
                    strJson.Append("\"ChildNodes\":" + TreeViewJson(data, entity.id) + "");
                    strJson.Append("},");
                }
                strJson = strJson.Remove(strJson.Length - 1, 1);
            }
            strJson.Append("]");
            return strJson.ToString();
        }
    }
}