1using System;
 2using System.Data;
 3using MyShop.Model;
 4
 5namespace MyShop.IDAL
 6...{
 7    public interface ICity
 8    ...{
 9        int Add(CityInfo model);
10        int Delete(string filter);
11        bool Exist(string filter);
12        DataSet GetDataSet();
13        DataSet GetDataSet(string filter);
14        CityInfo GetModel(DataRow dr);     
15        
16        DataSet Query(string sql);
17        int Update(CityInfo model, string filter);
18
19        DataSet GetProvinceList();
20    }
21}
22