常用连接:

(一)常用连接:

1.使用SqlConnection对象:

public void SqlConnectionOpen()

{

SqlConnection conn= new SqlConnection();

conn.ConnectionString = "user id=sa;password=;initial catalog=northwind;datasource=localhost;connect Timeout=20";

conn.Open();

}

2.使用OleDbConnection对象:

public void OleDBConnectionOpen()

{

OleDBConnection conn = new OleDbconnection();

conn.ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;DataSource=C:\Customer.mdb";

conn.Open();

}

(二)其它:

1.ODBC连接Access本地数据库

conGoodDay.Open("Driver={Microsoft Access Driver(*.mdb)};"+"Dbq=C:\a.mdb;"+

"Uid=Admin;"+"Pwd=;");

2.ODBC连接Access系统数据库

conGoodDay.Open("Driver={Microsoft Access Driver(*.mdb)};"+"Dbq=C:\a.mdb;"+

"SystemDB=Admin;"+"Pwd=;");

3.ODBC连接Access系统数据库

conGoodDay.Open("Driver={Microsoft Access Driver(*.mdb)};"+"Dbq=\\server\share\a.mdb;");

4.ODBC连接Excel系统数据库

conGoodDay.Open("Driver={Microsoft Access Driver(*.xls)};"+"DriverId=790;"+

"Dbq=C:\a.xls;"+"DefaultDir=c:\somepath;");

5.ODBC连接Oracle系统数据库

conGoodDay.Open("Driver={Microsoft ODBC for Oracle};"+"Server=OracleServer.world;"+

"Uid=Admin;"+"Pwd=password;");

6.ODBC连接Sql Servr

conGoodDay.Open("Driver={Sql Server};"+"Server=myServer;"+"Database=myDatabaseName;"

"Uid=Admin;"+"Pwd=password;");

7.ODBC连接Visual FoxPro

conGoodDay.Open("Driver={Microsoft Visual FoxPro Driver};"+

"SourceType=DBC;"+"SourceDB=c:a.dbc;"+"Exclusive=No;");