using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Script.Serialization;
using System.Data;

namespace MESWebSite.CommonClass
{
    /// <summary> 
    /// Tree数据辅助类
    /// </summary> 
    public class JEasyUITree
    {
        public class TreeNode
        {
            public string id { get; set; }                  //节点的id值
            public string text { get; set; }                //节点显示的名称
            public string state { get; set; }               //节点的打开状态
            public bool @checked { get; set; }               //checked标志
            public Dictionary<string, object> attributes { get; set; }    //节点属性字段
            public List<TreeNode> children { get; set; }    //子节点列表
        }

        public TreeNode CreateNode(DataRow r)
        {
            TreeNode node = new TreeNode();
            node.id = r["id"].ToString();
            node.text = r["text"].ToString();
            node.children = new List<TreeNode>();
            return node;
        }
        /// <summary>  
        /// 递归创建TreeNode集合列表  
        /// </summary>  
        /// <param name="dt">DataTable</param>  
        /// <param name="listNodes">集合列表</param>  
        /// <param name="pid">节点父id</param>  
        public void LoadSubNode(DataTable dt, List<TreeNode> listNodes, string pid = "0")
        {
            DataRow[] rows = dt.Select("pid=" + pid.ToString());
            foreach (DataRow r in rows)
            {
                //生成TreeNode  
                TreeNode node = CreateNode(r);
                //将节点 加入到 树节点集合  
                listNodes.Add(node);
                //递归 为这个新创建的 树节点找 子节点  
                LoadSubNode(dt, node.children, node.id);
            }
        }
    }

    public class JEasyUIHelper
    {
        /// <summary> 
        /// datagrid数据传输类
        /// </summary> 
        public class DataGridModel
        {
            public string total;
            public List<Dictionary<string, object>> rows;
        }

        /// <summary> 
        /// 数据表转JSON,用于datagrid提供数据 
        /// </summary>
        /// <param name="total">总行数</param>
        /// <param name="dt">数据表</param> 
        /// <returns>JSON字符串</returns>
        public static string DataTableToJSONdatagrid(int total, DataTable dt)
        {
            DataGridModel model = new DataGridModel();
            model.total = total.ToString();
            model.rows = JSONHelper.DataTableToList(dt);
            return JSONHelper.ObjectToJSON(model);
        }

        /// <summary> 
        /// 数据集转JSON，用于datagrid提供数据 
        /// </summary>
        /// <param name="ds">数据集,表1存total行数，表2存数据</param> 
        /// <returns>JSON字符串</returns>
        public static string DataSetToJSONdatagrid(DataSet ds)
        {
            DataGridModel model = new DataGridModel();
            model.total = ds.Tables[0].Rows[0][0].ToString();
            model.rows = JSONHelper.DataTableToList(ds.Tables[1]);
            return JSONHelper.ObjectToJSON(model);
        }
        
    }
}