数据库连接字符串集合

(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;");

Web.Config中：
<add key="AccessPath" value="DataBase\my.mdb" />
程序中：
string filePath=System.Web.HttpContext.Current.Request.PhysicalApplicationPath.ToString()+System.Configuration.ConfigurationSettings.AppSettings["AccessPath"];