CloudComputingFinalProject/App.code/DAL/followproduct.cs

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

namespace Basic.DAL
{
    /// <summary>
    /// ���ݷ��ʲ�
    /// </summary>
    public partial class followproduct
    {
        #region �˴����ɹ�������

        /// <summary>
        /// ����һ������
        /// </summary>
        public int Add(Basic.Model.followproduct model)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("insert into tb_followproduct(");
            strSql.Append("product_id,add_time,openid)");
            strSql.Append(" values (");
            strSql.Append("@product_id,@add_time,@openid)");
            strSql.Append(";select @@IDENTITY");

            SqlParameter[] parameters =
            {
                new SqlParameter("@product_id", SqlDbType.Int,10),
                new SqlParameter("@add_time", SqlDbType.DateTime,23),
               new SqlParameter("@openid", SqlDbType.NVarChar,255)
            };
            parameters[0].Value = model.product_id;
            parameters[1].Value = model.add_time;
            parameters[2].Value = model.openid;

            object obj = DbHelperSQL.GetSingle(strSql.ToString(), parameters);
            if (obj == null)
            {
                return 0;
            }
            else
            {
                return Convert.ToInt32(obj);
            }
        }



        /// <summary>
        /// ɾ��һ������
        /// </summary>
        public bool Delete(int id)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("delete from  tb_followproduct");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = { 
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;
            int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// ����ǰ��������
        /// </summary>
        public DataSet GetList(int Top, string strWhere, string filedOrder)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select ");
            if (Top > 0)
            {
                strSql.Append(" top " + Top.ToString());
            }
            strSql.Append("product_id,add_time,openid from tb_followproduct");
            strSql.Append(" from tb_followproduct");
            if (strWhere.Trim() != "")
            {
                strSql.Append(" where " + strWhere);
            }
            strSql.Append(" order by " + filedOrder);
            return DbHelperSQL.Query(strSql.ToString());
        }

        /// <summary>
        /// ���ò�ѯ��ҳ����
        /// </summary>
        public DataSet GetList(string _strWhere, string _orderby, int _pageSize, int _page, out int recordCount)
        {
            BasicPage bp = new BasicPage();
            StringBuilder str_Sql = new StringBuilder();
            str_Sql.Append("select top " + _pageSize + " product_id,add_time,openid from tb_followproduct");
            str_Sql.Append(" where ");
            str_Sql.Append(_strWhere);
            str_Sql.Append(" and id not in ");
            str_Sql.Append(" ( ");
            str_Sql.Append(" select top " + (_page - 1) * _pageSize + " id from tb_followproduct ");
            str_Sql.Append(" where ");
            str_Sql.Append(_strWhere);
            str_Sql.Append(" order by ");
            str_Sql.Append(_orderby);
            str_Sql.Append(" ) ");
            str_Sql.Append(" order by ");
            str_Sql.Append(_orderby);
            DataSet dst = bp.SelectDataBase("tb_followproduct", str_Sql.ToString());
            //
            recordCount = totlePage(showTotal(_strWhere), _pageSize);
            return dst;
        }

        //��ҳ��
        public int totlePage(int Total, int PageSize)
        {
            if (Total % PageSize == 0)
            {
                return Total / PageSize;
            }
            else
            {
                return Total / PageSize + 1;
            }
        }

        //������
        public int showTotal(string strSql)
        {
            BasicPage bp = new BasicPage();
            int intTotal = 0;
            SqlDataReader myread = bp.getRead("select count(id) as CountId from tb_shopcart where " + strSql);
            if (myread.Read())
            {
                intTotal = Convert.ToInt32(myread["CountId"].ToString());
            }
            myread.Close();
            return intTotal;
        }

        /// <summary>
        /// �Ƿ����ڸü�¼
        /// </summary>
        public bool Exists(int id)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select count(1) from tb_followproduct");
            strSql.Append(" where product_id=@product_id");
            SqlParameter[] parameters =
            {
                new SqlParameter("@product_id", SqlDbType.Int,10)
            };
            parameters[0].Value = id;

            return DbHelperSQL.Exists(strSql.ToString(), parameters);
        }

        /// <summary>
        /// �޸�һ������
        /// </summary>
        public void UpdateField(int id, string strValue)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("update tb_followproduct set " + strValue);
            strSql.Append(" where id=" + id);
            DbHelperSQL.ExecuteSql(strSql.ToString());
        }


        #endregion
    }
}