DAL下ProductCategoryDAL.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Web.UI.WebControls;

namespace DAL
{
    public class ProductCategoryDAL
    {
        #region 綁定產品分類下拉框
        /// <summary>
        /// 綁定產品分類下拉框
        /// </summary>
        /// <returns></returns>
        public void BindProductCategoryList(DropDownList ddl)
        {
            foreach (DataRow dr in GetCategoryList().Rows)
            {
                ddl.Items.Add(new ListItem(dr["name"].ToString(), dr["id"].ToString()));
            }
        }
        #endregion
        #region 綁定父級產品分類下拉框
        /// <summary>
        /// 綁定父級產品分類下拉框
        /// </summary>
        /// <returns></returns>
        public void BindUpperProductCategoryList(DropDownList ddl)
        {
            foreach (DataRow dr in GetUpperCategoryList().Rows)
            {
                ddl.Items.Add(new ListItem(dr["name"].ToString(), dr["id"].ToString()));
            }
        }
        #endregion
        #region 綁定子級產品分類下拉框
        /// <summary>
        /// 綁定子級產品分類下拉框
        /// </summary>
        /// <returns></returns>
        public void BindUpperProductCategoryList(DropDownList ddl)
        {
            foreach (DataRow dr in GetChildCategoryList().Rows)
            {
                ddl.Items.Add(new ListItem(dr["name"].ToString(), dr["id"].ToString()));
            }
        }
        #endregion

        /// <summary>
        /// 查詢所有產品分類
        /// </summary>
        /// <returns></returns>
        public DataTable GetCategoryList()
        {
            return DbHelperSQL.Query("select * from tbproductcategory").Tables[0];
        }
        /// <summary>
        /// 查詢父級產品分類
        /// </summary>
        /// <returns></returns>
        public DataTable GetUpperCategoryList()
        {
            return DbHelperSQL.Query("select * from tbproductcategory where upperid is null").Tables[0];
        }
       
        /// <summary>
        /// 查詢子級產品分類
        /// </summary>
        /// <returns></returns>
        public DataTable GetChildCategoryList()
        {
            return DbHelperSQL.Query("select * from tbproductcategory where upperid is not null").Tables[0];
        }

       

        /// <summary>
        /// 根據id查詢標題
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public string GetTitle(int id)
        {
            string sqlstr = "select name from tbproductcategory where id=@id";
            SqlParameter[] param = {
                                    new SqlParameter("@id",SqlDbType.Int)
                                   };
            param[0].Value = id;
            return DbHelperSQL.GetSingle(sqlstr, param).ToString();
        }
        /// <summary>
        /// 獲得每一個分類並從子表中獲取該類第一條記錄
        /// </summary>
        /// <param name="top">想要獲取內容的數目</param>
        public DataTable GetFirstOfAllWithCateName(int top)//獲得每條分類的第一條內容
        {
            return DbHelperSQL.Query("select * ,(select name from tbproductcategory where tbproduct.categoryid=tbproductcategory.id) as categoryname from tbproduct where id in(select top " + top + " min(id) from tbproduct group by categoryid order by categoryid)").Tables[0];
        }
    }
}