/// <summary>
    /// 获得数据列表List<>,DataReader 使用参数的
    /// </summary>
    /// <param name="strWhere">条件</param>
    /// <param name="ht">HashTable,保存参数名及参数对应的值</param>
    /// <returns>List<DotNet.Model.Base_Department></returns>
    /// 使用方法：string str = "id=@id";Hashtable ht = new Hashtable();ht.Add("@id", 10);
    public List<DotNet.Model.Base_Department> GetListUseDataReader(string strWhere, Hashtable ht=null)
    {
        StringBuilder strSql = new StringBuilder();
        strSql.Append("Select Id,DepartmentName,NetCount,Remarks,CreatedOn,IsPublic,IsLock,SavedOn,LockVersion,Operator_Id from Base_Department");
        if(strWhere.Trim().Length!=0)
        {
            strSql.Append(" Where " + strWhere.Trim());
        }
        //获取DataReader 
        SqlDataReader reader; 


        //组织参数
        if (ht != null && ht.Count > 0)
        {
            SqlParameter[] parameters = new SqlParameter[ht.Count];
            int i = 0;
            foreach (DictionaryEntry dc in ht)
            {
                parameters[i] = new SqlParameter() ;
                parameters[i].ParameterName = dc.Key.ToString();
                parameters[i].Value = dc.Value;
                i++;
            }
             reader = DbHelperSQL.ExecuteReader(strSql.ToString(), parameters);
        }
        else
            reader = DbHelperSQL.ExecuteReader(strSql.ToString());
        if (reader.HasRows)
        {
            List<DotNet.Model.Base_Department> list = new List<DotNet.Model.Base_Department>();
            while (reader.Read())
            {
                DotNet.Model.Base_Department model = new DotNet.Model.Base_Department();
                model.Id = reader.GetInt64(reader.GetOrdinal("Id"));
                model.DepartmentName = reader.GetString(reader.GetOrdinal("DepartmentName"));
                model.NetCount = reader.GetInt32(reader.GetOrdinal("NetCount"));
                model.Remarks = reader.GetString(reader.GetOrdinal("Remarks"));
                model.CreatedOn = reader.GetDateTime(reader.GetOrdinal("CreatedOn"));
                model.IsPublic = reader.GetBoolean(reader.GetOrdinal("IsPublic"));
                model.IsLock = reader.GetBoolean(reader.GetOrdinal("IsLock"));
                model.SavedOn = reader.GetDateTime(reader.GetOrdinal("SavedOn"));
                model.LockVersion = reader.GetInt32(reader.GetOrdinal("LockVersion"));
                model.Operator_Id = reader.GetInt64(reader.GetOrdinal("Operator_Id"));
                list.Add(model);
            }
            reader.Close();
            return list;
        }
        else
        {
            reader.Close();
            return null;
        }
    }

protected void Page_Load(object sender, EventArgs e)
{
        if (!IsPostBack)
        {
            SqlConnection myConn = GetConnection();
            string sqlStr = "select * from tbStudent";  //查询所有学生信息的SQL
            SqlCommand myCmd = new SqlCommand(sqlStr, myConn);//创建Command对象
            try
            {
                myConn.Open();
                //执行SQL语句，并返回DataReader对象
                SqlDataReader myDr = myCmd.ExecuteReader();
                //显示标题文字
                this.lblStudent.Text = "&nbsp&nbsp&nbsp学号 
                &nbsp&nbsp&nbsp 姓名
                &nbsp&nbsp&nbsp 性别
               &nbsp&nbsp&nbsp 班级
                &nbsp&nbsp&nbsp 系别<br>";
              while (myDr.Read())          //循环读取结果集
                {
                       //读取数据库中的信息并显示在界面中
                      this.lblStudent.Text +=myDr["sno"].ToString().Trim()
                              + "&nbsp&nbsp&nbsp&nbsp"
                              + myDr["sname"].ToString().Trim()
                              + "&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp"
                              + myDr["ssex"].ToString().Trim()
                              + "&nbsp&nbsp&nbsp&nbsp"
                              + myDr["sclass"].ToString().Trim()
                              + "&nbsp&nbsp&nbsp&nbsp" 
                              +myDr["sdept"].ToString().Trim()
                              +"</br>";
                }
                myDr.Close();            //关闭DataReader
            }
            catch
            {
                Response.Write("连接失败！"); //异常处理
            }
            finally
            {
                myConn.Close();      //关闭数据库连接
            }
        }
}