我有兩個疑問: Q1: select name from presidents where country = 'USA'
Q2: select 'Obama' as name from presidents where country = 'USA'
當使用System.Data.Odbc.OdbcCommandExecuteReader則返回DbDataReader包含在Q1的情況下'O
當我在同一時間,我得到了下面的錯誤有多個DBDataReaders讀取數據: There is already an open DataReader associated with this Connection which must be
closed first
我有我的配置能ConnectionPooling所以我不明白爲什麼我收到此錯誤。它不是因爲我的當前連接已被使用而創建新的連接嗎
獲取查詢結果,這是我的函數: public int gtCountCertificatByExercice()
{
DataTable resDataTable = new DataTable();
DBConnection dbConnection = new DBConnection();
string query = "SELECT CO