(1)建立連接
(2)創(chuàng)建命令
(3)打開連接
(4)執(zhí)行
(5)訪問
(6)關(guān)閉連接
"在連接數(shù)據(jù)庫的過程中,數(shù)據(jù)庫連接字符串為:
Data Source=localhost; Initial Catalog= Haier; user id=sa; password=123456;
Data Source代表什么含義:()
Initial Catalog代表什么含義:()
user id代表什么含義:()
password代表什么含義:()"