阅读器关闭时尝试调用 Read 无效

public static SqlDataReader GetDataReader(string sql, params SqlParameter[] parameters)

{

SqlConnection conn = new SqlConnection(connstr);

SqlCommand cmd = new SqlCommand(sql, conn);

foreach (SqlParameter parameter in parameters)

{

cmd.Parameters.Add(parameter);

}

try

{

conn.Open();

return cmd.ExecuteReader(CommandBehavior.CloseConnection);//关闭SqlDataReader 会自动关闭Sqlconnection

}

catch (Exception e)

{

throw new Exception("执行任务失败:" + e.Message + " " + sql);

}

}