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[166519] 主题: ADO.net 中数据库连接方式
作者: little (渺小)
标题: ADO.net 中数据库连接方式[转载]
来自: 203.95.*.*
发贴时间: 2004年03月03日 23:37:52 (UTC +08:00)
长度: 5061字
carper(原作)

在MSDN中,.net的数据库连接字符串都有详细的说明,我这里以代码范例的方式罗列一
些,具体的每一项代表的意义可以参看MSDN.

ADO.net 中数据库连接方式(微软提供)

微软提供了以下四种数据库连接方式:
System.Data.OleDb.OleDbConnection
System.Data.SqlClient.SqlConnection
System.Data.Odbc.OdbcConnection
System.Data.OracleClient.OracleConnection
下面我们以范例的方式,来依次说明:

System.Data.SqlClient.SqlConnection
常用的一些连接字符串(C#代码):

SqlConnection conn
= new SqlConnection( "Server=(local);Integrated Security=SSPI;database=Pubs");

SqlConnection conn
= new SqlConnection("server=(local)\\NetSDK;database=pubs;Integrated Security=S
SPI");

SqlConnection conn = new SqlConnection(
"Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind;");

SqlConnection conn = new SqlConnection(
" data source=(local);initial catalog=xr;integrated security=SSPI;
persist security info=False;workstation id=XURUI;packet size=4096; ");

SqlConnection myConn = new
System.Data.SqlClient.SqlConnection("Persist Security Info=False;Integrated
Security=SSPI;database=northwind;server=mySQLServer");

SqlConnection conn = new SqlConnection(
" uid=sa;pwd=passwords;initial catalog=pubs;data source=127.0.0.1;Connect Timeou
t=900");

更多字符串连接说明请看MSDN:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/
frlrfSystemDataSqlClientSqlConnectionClassConnectionStringTopic.asp

System.Data.OleDb.OleDbConnection
常用的一些连接字符串(C#代码):

OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Da
ta Source=D:\MyWeb\81\05\GrocerToGo.mdb");

OleDbConnection conn = new OleDbConnection(
@"Provider=Microsoft.Jet.OLEDB.4.0;Password=;
User ID=Admin;Data Source=grocertogo.mdb;");

OleDbConnection conn = new OleDbConnection(
"Provider=MSDAORA; Data Source=ORACLE8i7;Persist Security Info=False;Integrated S
ecurity=yes");

OleDbConnection conn = new OleDbConnection(
"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=c:\bin\LocalAccess40.mdb");

OleDbConnection conn = new OleDbConnection(
"Provider=SQLOLEDB;Data Source=MySQLServer;Integrated Security=SSPI");

更多字符串连接说明请看MSDN:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/
frlrfSystemDataOleDbOleDbConnectionClassConnectionStringTopic.asp?frame=true



System.Data.OracleClient.OracleConnection
常用的一些连接字符串(C#代码):

OracleConnection myConn = new System.Data.OracleClient.OracleConnection(
"Data Source=Oracle8i;Integrated Security=yes");

 

更多字符串连接说明请看MSDN:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/
frlrfSystemDataOracleClientOracleConnectionClassConnectionStringTopic.asp?fr
ame=true


System.Data.Odbc.OdbcConnection
常用的一些连接字符串(C#代码):


OdbcConnection conn = new OdbcConnection(
"Driver={SQL Server};Server=MyServer;Trusted_Connection=yes;Database=Northwin
d;");

OdbcConnection conn = new OdbcConnection(
"Driver={Microsoft ODBC for Oracle};Server=ORACLE8i7;
Persist Security Info=False;Trusted_Connection=yes");

OdbcConnection conn = new OdbcConnection(
"Driver={Microsoft Access Driver (*.mdb)};DBQ=c:\bin\nwind.mdb");

OdbcConnection conn = new OdbcConnection(
"Driver={Microsoft Excel Driver (*.xls)};DBQ=c:\bin\book1.xls");


OdbcConnection conn = new OdbcConnection(
"Driver={Microsoft Text Driver (*.txt; *.csv)};DBQ=c:\bin");

OdbcConnection conn = new OdbcConnection("DSN=dsnname");

更多字符串连接说明请看MSDN:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/
frlrfSystemDataOdbcOdbcConnectionClassConnectionStringTopic.asp?frame=true


其他厂商提供的数据库连接:

DB2Connection myConn = new IBM.Data.DB2.DB2Connection(
"DATABASE = SAMPLE;UID=<username>; PWD=<password>;");

DB2Connection myConn = new IBM.Data.DB2.DB2Connection("DATABASE = SAMPLE");


BdpConnection myConn = new Borland.Data.Provider.BdpConnection("assembly=Borl
and.Data.Mssql,Version=1.1.0.0,Culture=neutral,PublicKeyToken=91d62ebb5b0d1b
1b;ve
ndorclient=sqloledb.dll;osauthentication=False;database=<database>;use
rnam
e=<user>;hostname=<host>;password=<password>;provider=MSSQ
L");

BdpConnection myConn = new Borland.Data.Provider.BdpConnection("assembly=Borl
and.Data.Db2,Version=1.1.0.0,Culture=neutral,PublicKeyToken=91d62ebb5b0d1b1b
;ve
ndorclient=db2cli.dll;database=<database>;username=<user>;
password=<password>;provider=DB2");


Connection Pooling


在SQL Server、OLE DB和.NET框架结构中的Data Provider中,都提供了隐式的连接池连接
支持。你可以在ConnectionString中指定不同的参数值控制连接池的行为。比如下面的
例子使OLE DB的连接池无效并自动地进行事务处理:
Provider=SQLOLEDB;OLE DB Services=-4;Data Source=localhost;Integrated Security=S
SPI;
在SQL Server.NET Data Provider中提供了以下参数设置控制连接池的行为:Connection L
ifttime、Connection Reset、Enlist、Max Pool Size、Min Pool Size和Pooling。

更多数据库连接信息,以及非ADO.net的连接字符串可以参看:
http://www.connectionstrings.com/


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