常用几种数据库连接字符串
Microsoft SQL server
windows安全登陆
"Data Source=(local); Initial Catalog=Northwind; Integrated Security=True;"
SQL Server登陆
"Data Source=(local); Initial Catalog=Northwind; UserID=sa; PassWord=111111;"
Access
"Provider=Microsoft.jet.oledb.4.0; Data Source=d:\myDB.mdb"
Excel
"Provider=Microsoft.jet.oledb.4.0; Data Source=d:\myExcel.xls; Extended Properties=Excel8.0"