连接字符串

//sql server 身份验证 连接字符串

private string ConnstrSqlServer = "server=服务器名称;uid=登录名称;pwd=登录密码;database=数据库名称";

//windows 身份验证连接字符串

private string ConnstrWindows = "server=服务器名称;database=数据库名称;Trusted_Connection=SSPI";

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;");