请问这段代码具体怎么解释？

[dhdhzzw]

public ArrayList SelectStu(int StuId)
{
ArrayList al = new ArrayList();

SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["Connection"]);
con.Open();

string sql = "select * from StudentInfo where studentID="+StuId+"";
SqlCommand com = new SqlCommand(sql,con);
SqlDataReader dr = com.ExecuteReader();
while(dr.Read())
{
al.Add(dr["Name"].ToString());
al.Add(dr["Age"].ToString());
al.Add(dr["Sex"].ToString());
al.Add(dr["Address"].ToString());
al.Add(dr["Phone"].ToString());
al.Add(dr["ClassID"].ToString());


}
return al;


}

[qiu_xue_]

还没学到这里等我学到了给你讲吧 等我

[createTim]

这里是读取数据表的记录到 al
注意：这段代码并不完整需要关闭不然error