一个整数值,我有一个SQL查询,如下所示:返回从SQL Server
SqlConnection conn = new SqlConnection(connectionString);
conn.Open();
SqlCommand cmd = new SqlCommand("SELECT id FROM Pages WHERE pageName=about",conn);
//cmd.Parameters.Add("@pageName","hakkinda");
SqlDataReader reader = cmd.ExecuteReader();
flID = reader.GetInt16(0);
reader.Close();
conn.Close();
我得到一个错误信息:
Invalid attempt to read when no data is present.
有什么不对?