加载树节点方法

#region 组合ztree
        //树结构HTML
        /// <summary>
        /// 获取树结构
        /// 添加人：
        /// 添加时间：2015-10-30
        /// </summary>
        /// <param name="_dt">DataTable数据源</param>
        /// <param name="sCudisplayfiled">显示字段</param>
        /// <param name="sCudisplayvalue">显示值</param>
        /// <param name="parentid">父节点</param>
        /// <param name="sNodeshow">节点展示 展开：1，折叠：2</param>
        /// <param name="sOpenMode">打开方式 新页面：1本页面：2</param>
        /// <param name="sSelectMode">单选/多选 单选：1，多选：2</param>
        /// <param name="sNodeicon">节点图标</param>
        /// <param name="sNodeurl">点击节点跳转地址</param>
        /// <returns></returns>
        public static string fListMenu(DataTable _dt, string sCudisplayfiled, string sCudisplayvalue, string parentid, string sNodeshow, string sOpenMode, string sSelectMode, string sNodeicon, string sNodeurl)
        {
            StringBuilder sb = new StringBuilder();
            DataRow[] rows = _dt.Select(parentid + "='0'");//查找跟节点
            sb.Append("[");
            bool isFist = false;
            #region 组合DAT的JSON字符串
            foreach (DataRow dr in rows)
            {
                if (isFist)
                    sb.Append(",");
                isFist = true;
                string id = dr[sCudisplayfiled].ToString();
                sb.Append("{");
                sb.AppendFormat("'id':'{0}',", dr[sCudisplayfiled]);
                sb.AppendFormat("'text':'{0}',", dr[sCudisplayvalue]);
                sb.AppendFormat("'pid':'{0}',", "0");
                sb.AppendFormat("'iconCls':'icon_{0}',", sNodeicon);
                sb.AppendFormat("'url':'{0}',", sNodeurl);
                sb.AppendFormat("'state':'{0}',", sNodeshow);
                sb.Append("children:[");
                sb.Append(fGetSubMenu(id, _dt, parentid, sCudisplayfiled, sCudisplayvalue, sNodeshow, sOpenMode, sSelectMode, sNodeicon, sNodeurl));
                sb.Append("]");
                sb.Append("}");
            }
            #endregion
            sb.Append("]");
            return sb.ToString();
        }

        /// <summary>
        /// 递归调用生成无限级别
        /// 添加人：
        /// 添加时间：2015-10-30
        /// </summary>
        /// <param name="pid">父节点</param>
        /// <param name="dt">DataTable</param>
        /// <param name="parentid">父节点</param>
        /// <param name="sCudisplayfiled">显示字段</param>
        /// <param name="sCudisplayvalue">显示值</param>
        /// <param name="sNodeshow">节点展示 展开：1，折叠：2</param>
        /// <param name="sOpenMode">打开方式 新页面：1本页面：2</param>
        /// <param name="sSelectMode">单选/多选 单选：1，多选：2</param>
        /// <param name="sNodeicon">节点图标</param>
        /// <param name="sNodeurl">点击节点跳转地址</param>
        /// <returns>返回JSON字符</returns>
        private static string fGetSubMenu(string pid, DataTable dt, string parentid, string sCudisplayfiled, string sCudisplayvalue, string sNodeshow, string sOpenMode, string sSelectMode, string sNodeicon, string sNodeurl)
        {
            StringBuilder sb = new StringBuilder();
            DataRow[] rows = dt.Select(parentid + "='" + pid + "'");
            if (rows.Length > 0)
            {
                bool isFist = false;
                #region 组合DAT的JSON字符串
                foreach (DataRow dr in rows)
                {
                    if (isFist)
                        sb.Append(",");
                    isFist = true;
                    string id = dr[sCudisplayfiled].ToString();
                    sb.Append("{");
                    sb.AppendFormat("'id':'{0}',", dr[sCudisplayfiled]);
                    sb.AppendFormat("'text':'{0}',", dr[sCudisplayvalue]);
                    sb.AppendFormat("'pid':'{0}',", dr[parentid]);
                    sb.AppendFormat("'iconCls':'icon_{0}',", sNodeicon);
                    sb.AppendFormat("'url':'{0}',", sNodeurl);
                    sb.AppendFormat("'state':'{0}',", sNodeshow);
                    sb.Append("children:[");
                    sb.Append(fGetSubMenu(id, dt, parentid, sCudisplayfiled, sCudisplayvalue, sNodeshow, sOpenMode, sSelectMode, sNodeicon, sNodeurl));
                    sb.Append("]");
                    sb.Append("}");
                }
                #endregion
            }
            return sb.ToString();
        }
        #endregion