将数据填充到listbox（4）

4、工厂类

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;

namespace Factory
{
    public class DtatAccess
    {
        public static object CreateDAL(string DALName)
        {
            return Assembly.Load("ServerDAL").CreateInstance("ServerDAL." + DALName);
        }
    }
}