C#数据库连接字符串
转自:http://blog.csdn.net/xiaokexinger/article/details/1541441
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=SSPI");
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
Timeout=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;Data
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
Security=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?frame=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=Northwind;");
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=91d62ebb5b0d1b1b;ve
ndorclient=sqloledb.dll;osauthentication=False;database=<database>;usernam
e=<user>;hostname=<host>;password=<password>;provider=MSSQL");
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=SSPI;
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 Lifttime、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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