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