busobj.cs

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namespace BusinessLayer 
{
using System;
using System.Data;
using System.Data.SqlClient;
using TwoLayer;

  public class BusObj 
  {
    private DataObj data;

    public BusObj() 
    {
      //为DataObj对象的实例data初始化
      data = new DataObj("server=(local);database=Northwind;Trusted_Connection=yes");
    }

    public DataView GetCity() 
    {
       return data.GetCity();
    }

    public DataView GetEmployeesForCity(String Cityvalue) 
    {
       return data.GetEmployeesForCity(Cityvalue);
       
    }
  }
}