.NET中各种数据库连接大全(1)

·SQL Server

ODBC
Standard Security:

            "Driver={SQLServer};Server=Aron1;Database=pubs;Uid=sa;Pwd=asdasd;"
Trusted connection:

            "Driver={SQLServer};Server=Aron1;Database=pubs;Trusted_Connection=yes;"
Prompt for username and password:

oConn.Properties("Prompt") = adPromptAlways

oConn.Open "Driver= {SQLServer};Server=Aron1;DataBase=pubs;"

OLEDB, OleDbConnection (.NET) 

Standard Security:

"Provider=sqloledb;Data Source=Aron1;Initial Catalog= pubs;UserId=sa;Password=asdasd;"
Trusted Connection:

"Provider=sqloledb;Data Source=Aron1;Initial Catalog=pubs;Integrated Security=SSPI;"

(use serverName\instanceName as Data Source to use an specifik SQLServer instance, only SQLServer2000)
Prompt for username and password:

oConn.Provider = "sqloledb"

oConn.Properties("Prompt") = adPromptAlways

oConn.Open "Data Source=Aron1;Initial Catalog=pubs;"
Connect via an IP address:

"Provider=sqloledb;Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog= pubs;UserID=sa;Password=asdasd;"

(DBMSSOCN=TCP/IP instead of Named Pipes, at the end of the Data Source is the port to use (1433 is the default))
SqlConnection (.NET) 

Standard Security:

"Data Source=Aron1;Initial Catalog= pubs;UserId=sa;Password=asdasd;"
Trusted Connection:

"Data Source=Aron1;Initial Catalog=pubs;Integrated Security=SSPI;"

(use serverName\instanceName as Data Source to use an specifik SQLServer instance, only SQLServer2000)
Connect via an IP address:

"Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog= pubs;UserID=sa;Password=asdasd;"

(DBMSSOCN=TCP/IP instead of Named Pipes, at the end of the Data Source is the port to use (1433 is the default))
Declare the SqlConnection:

C#:

using System.Data.SqlClient;

SqlConnection oSQLConn = new SqlConnection();

oSQLConn.ConnectionString="my connectionstring";

oSQLConn.Open(); 

VB.NET:

Imports System.Data.SqlClient

Dim oSQLConn As SqlConnection = New SqlConnection()

oSQLConn.ConnectionString="my connectionstring"

oSQLConn.Open()
Data Shape 

MS Data Shape

"Provider=MSDataShape;Data Provider=SQLOLEDB;Data Source=Aron1;Initial Catalog= pubs;UserID=sa;Password=asdasd;"

Read more
How to define wich network protocol to use

Example:

"Provider=sqloledb;Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog= pubs;UserID=sa;Password=asdasd;"

Name Network
library dbnmpntw Win32 Named Pipes dbmssocn Win32 Winsock TCP/IP dbmsspxn Win32 SPX/IPX dbmsvinn Win32 Banyan Vines dbmsrpcn Win32 Multi-Protocol (Windows RPC)

Important note! 

When connecting through the SQLOLEDB provider use the syntax Network Library=dbmssocn

and when connecting through MSDASQL provider use the syntax Network=dbmssocn

               All SqlConnection connectionstring properties
This table shows all connectionstring properties for the ADO.NET SqlConnection object. Most of the properties are also used in ADO. All properties and descriptions is from msdn.   

2009-09-04                   

注：源自原百度博客“至美心”