我正在尝试使用getRecords列表添加getRecords2列表。出于某些原因,在getRecords上,当我调用它时需要很长时间来处理和超时。
public static List<ListA> getRecords2(string id)
{
List<ListA> listOfRecords = new List<ListA>();
using (SqlConnection con = SqlConnect.GetDBConnection())
{
con.Open();
SqlCommand cmd = con.CreateCommand();
cmd.CommandText = "sp2";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@id", id));
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
ListA listMember = new ListA();
listMember.ID = (int)reader["ID"];
listMember.Name = reader["FullName"].ToString().Trim();
}
con.Close();
}
return listOfRecords;
}
public static List<ListA> getRecords(string id)
{
List<ListA> listOfRecords = new List<ListA>();
using (SqlConnection con = SqlConnect.GetDBConnection())
{
con.Open();
SqlCommand cmd = con.CreateCommand();
cmd.CommandText = "sp1";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@id", id));
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
ListA listMember = new ListA();
listMember.ID = (int)reader["ID"];
listMember.Name = reader["FullName"].ToString().Trim();
}
con.Close();
}
List<ListA> newlist = getRecords(id);
foreach (ListA x in newlist) listOfRecords.Add(x);
return listOfRecords;
}
我在getRecords2中添加了getRecords列表。我做错了吗?
答案 0 :(得分:7)
首先,您没有在while(reader.Read())
循环中向列表中添加任何内容。 Add
和GetRecords
上都缺少GetRecords2
方法调用:
while (reader.Read())
{
ListA listMember = new ListA();
listMember.ID = (int)reader["ID"];
listMember.Name = reader["FullName"].ToString().Trim();
// you have to add this line:
listOfRecords.Add(listMember);
}
另一个问题是:你一遍又一遍地呼叫getRecords(id)
:
List<ListA> newlist = getRecords(id);
foreach (ListA x in newlist) listOfRecords.Add(x);
应该是:
List<ListA> newlist = getRecords2(id);
foreach (ListA x in newlist) listOfRecords.Add(x);
最后但并非最不重要:您不必致电con.Close();
- 当程序流退出using
时,它会自动完成,作为Dispose
方法的一部分。< / p>