DAL/ProductService.cs

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using System;
using System.Data;
using System.Text;
using System.Data.SqlClient;

namespace DAL
{
	/// <summary>
	/// 数据访问类:ProductService
	/// </summary>
	public partial class ProductService
	{
		public ProductService()
		{}
		#region  BasicMethod
        /// 获得数据列表
        /// </summary>
        public static DataSet GetListCommitDesc(string strWhere)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select  Max(p.id) as id,max(listImgUrl) as listImgUrl,max(proName) as proName,max(unit1) as unit1,max(price1) as price1,max(stopTypeName) as stopTypeName from Product p left join Comment c on p.id=c.productId where " + strWhere + " group by p.id order by count(c.id) desc");
           
            return DBHelperSQL.Query(strSql.ToString());
        }
        /// 获得数据列表
        /// </summary>
        public static DataSet GetListCommitAsc(string strWhere)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select  Max(p.id) as id,max(listImgUrl) as listImgUrl,max(proName) as proName,max(unit1) as unit1,max(price1) as price1,max(stopTypeName) as stopTypeName from Product p left join Comment c on p.id=c.productId where " + strWhere + " group by p.id order by count(c.id) asc");

            return DBHelperSQL.Query(strSql.ToString());
        }

        /// <summary>
        /// 更新推荐
        /// </summary>
        /// <param name="id"></param>
        /// <param name="status"></param>
        /// <returns></returns>
        public static int UpdateTj(int id,int status) 
        {
            string sql = "update Product set status = " + status + " where id = " + id;
            return DBHelperSQL.ExecuteSql(sql);
        }

		/// <summary>
		/// 是否存在该记录
		/// </summary>
		public static bool Exists(string proName)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("select count(1) from Product");
			strSql.Append(" where proName=@proName");
			SqlParameter[] parameters = {
					new SqlParameter("@proName", SqlDbType.VarChar,154)
			};
			parameters[0].Value = proName;

			return DBHelperSQL.Exists(strSql.ToString(),parameters);