"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:()"