StuMgmSys/StuMgmClient/Data.cs

using System;
using System.Collections.Generic;
using System.Data;

namespace StuMgmClient
{
    public enum Roles
    {
        NotFound = -1,
        Error = -2,
        Admin = 1,
        Teacher = 2,
        Student = 3,
    }
    class Data
    {
        //状态值字符串转字典
        public Dictionary<int, int> StateParsing(DataTable table)
        {
            Dictionary<int, int> myDictionary = new Dictionary<int, int>();
            ClientMysql cm = new ClientMysql();
            DataSet ds = cm.SelectState();
            DataRow dr = ds.Tables["user_info"].Rows[0];
            string state = dr["course_status"].ToString();
            int num = 0;
            int oldTem = 0;
            //切割字符串
            string[] sArray = state.Split(new char[2] { ':', ';' });
            foreach (string i in sArray)
            {
                if (i.Equals("")) { break; }
                int tem = Convert.ToInt32(i);
                num++;
                if (num % 2 != 0)
                {
                    myDictionary.Add(tem, 0);
                    oldTem = tem;
                }
                else
                {
                    myDictionary[oldTem] = tem;
                }
            }
            return myDictionary;
        }
        //字典转字符串
        public string DicParsing(Dictionary<int, int> dic) 
        {
            string stateText = "";
            foreach (var item in dic)
          {
              stateText = stateText + item.Key + ":" + item.Value + ";";
          }
            return stateText;
        }
        //查询所有子节点
        public void GetAllNodes(string id, DataTable table, ref Dictionary<int, int> nodesDic)
        {

            //把父节点的数据筛选出来
            DataRow[] rows = table.Select("pid =" + id);//取根  
            if (rows.Length <= 0)
            {
                nodesDic.Add(Convert.ToInt32(id), 0);
                return;
            }
            foreach (DataRow dr in rows)
            {
                GetAllNodes(dr["id"].ToString(), table, ref nodesDic);
            }
           
        }
        //获取所有子节点Dictionary
        public Dictionary<int, int> GetNodesDic(DataTable table) 
        {
            Dictionary<int, int> nodesDic = new Dictionary<int, int>();
            GetAllNodes("0", table, ref nodesDic);
            return nodesDic;
        }
    }
      
}