ADO.net 中数据库连接方式

ADO.net 中数据库连接方式
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/frlrfSystemDataOdbcOdb