CloudComputingFinalProject/App.code/Bll/product.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using Basic;
using System.Collections; 
/// <summary>
/// 网站配置
/// </summary>

namespace Basic.BLL
{
    public class product
    {
        public static string GetParentWhere(int _parentid)
        {
            Basic.BLL.product bllp = new Basic.BLL.product();
            string strWhereParentId = _parentid.ToString();
            strWhereParentId += bllp.GetChild("", _parentid);


            return strWhereParentId;
        }
        private string GetChild(string strAllChild, int _parentid)
        {
            Basic.DAL.pro_class dalpc = new Basic.DAL.pro_class();
            DataTable dt = dalpc.GetList(_parentid);
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                int childId = Convert.ToInt32(dt.Rows[i]["id"].ToString());
                strAllChild += "," + childId;
                strAllChild = GetChild(strAllChild, childId);
            }
            return strAllChild;
        }
        /// <summary>
        /// 取顶级父级的id
        /// </summary>
        /// <param name="_classid"></param>
        /// <returns></returns>
        public static int GetParentId(int _classid)
        {
            int _parentId = _classid;
            int _parent2 = 0;
            while (_parentId > 0)
            {
                _parent2 = _parentId;
                Basic.DAL.pro_class dalp = new Basic.DAL.pro_class();
                Basic.Model.pro_class modelp = dalp.GetModel(_parentId);
                if (modelp != null)
                {
                    _parentId = modelp.parent_id;
                }
            }
            return _parent2;
        }

        public static Hashtable GetParentListName(int _classid)
        {
            Hashtable htList = new Hashtable();
            int _parentId = _classid;
            int i = 0;
            while (_parentId > 0)
            { 
                Basic.DAL.pro_class dalp = new Basic.DAL.pro_class(); 
               
                Basic.Model.pro_class modelparent = dalp.GetModel(_parentId);
                i++;
                htList.Add("title"+i, modelparent.title);
                htList.Add("id"+i, modelparent.id);
                if (modelparent != null)
                {
                    _parentId = modelparent.parent_id; 
                }
            }
            return htList;
        }

       /// <summary>
        /// 根据某一个列，来获得排列的值
       /// </summary>
       /// <param name="strWhere"></param>
       /// <param name="key"></param>
       /// <returns></returns>
        public static DataTable GetListGroup(string strWhere,string key)
        {
            BasicPage bp=new BasicPage();
            DataTable dt = bp.SelectDataBase("news", "select " + key + ",count(id) as countid from tb_product where " + key + "<>'' and " + key + " is not null and  " + strWhere + " group by " + key + "  order by count(id) desc").Tables[0];
            return dt;
        }
         /// <summary>
        /// 获取价格范围
         /// </summary>
         /// <param name="strWhere"></param>
         /// <returns></returns>
        public static string[] GetPriceRange(string strWhere)
        {
            Basic.DAL.product dalp = new Basic.DAL.product();
            Decimal deMax = dalp.GetMaxPrice(strWhere);

            int intCount = 0;
            if (deMax % 100.00m > 0.00m)
            {
                intCount = (Convert.ToInt32((deMax-(deMax % 100.00m)) / 100.00m) + 1);
            }
            else 
            {
                intCount = Convert.ToInt32( deMax / 100.00m) ;
            }

            string[] ArrayRange=new string[ intCount ];
            for (int i = 0; i < intCount; i++)
            {
                ArrayRange[i] = (i*100)+"-"+((i+1)*100);
            }

            return ArrayRange;
        }
    }
}