数据库连接代码大全

数据库连接代码大全

SQL Server

ODBC

Standard Security:

"Driver={SQL Server};Server=Aron1;Database=pubs;Uid=sa;Pwd=asdasd;"

Trusted connection:

"Driver={SQL

Server};Server=Aron1;Database=pubs;Trusted_Connection=yes;"

Prompt for username and password:

oConn.Properties("Prompt") = adPromptAlways

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

OLE DB, OleDbConnection (.NET)

Standard Security:

"Provider=sqloledb;Data Source=Aron1;Initial Catalog=pubs;User Id=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;User ID=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;User Id=sa;Password=asdasd;"

- or -

"Server=Aron1;Database=pubs;User

ID=sa;Password=asdasd;Trusted_Connection=False"

(booth connection strings produces the same result)

Trusted Connection:

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

- or -

"Server=Aron1;Database=pubs;Trusted_Connection=True;"

(booth connection strings produces the same result)

(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;User ID=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();

https://www.360docs.net/doc/4819079157.html,:

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;User ID=sa;Password=asdasd;"

Want to learn data shaping? Check out 4GuyfFromRolla's great article about Data Shaping >>

Read more

How to define which network protocol to use

Example:

"Provider=sqloledb;Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog=pubs;User ID=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 https://www.360docs.net/doc/4819079157.html, SqlConnection object. Most of the properties are also used in ADO. All properties and descriptions is from msdn.

Name Default Description

Application Name The name of the application, or '.Net SqlClient Data Provider' if no application name is provided.

AttachDBFilename

-or-

extended properties

-or-

Initial File Name The name of the primary file, including the full path name, of an attachable database. The database name must be specified with the keyword 'database'.

Connect Timeout

-or-

Connection Timeout 15 The length of time (in seconds) to wait for a connection to the server before terminating the attempt and generating an error. Connection Lifetime 0 When a connection is returned to the pool, its creation time is compared with the current time, and the connection is destroyed if that time span (in seconds) exceeds the value specified by connection lifetime. Useful in clustered configurations to force load balancing between a running server and a server just brought on-line.

Connection Reset 'true' Determines whether the database connection is reset when being removed from the pool. Setting to 'false' avoids making an additional server round-trip when obtaining a connection, but the programmer must be aware that the connection state is not being reset.

Current Language The SQL Server Language record name.

Data Source

-or-

Server

-or-

Address

-or-

Addr

-or-

Network Address The name or network address of the instance of SQL Server to which to connect.

Enlist 'true' When true, the pooler automatically enlists the connection in the creation thread's current transaction context.

Initial Catalog

-or-

Database The name of the database.

Integrated Security

-or-

Trusted_Connection 'false' Whether the connection is to be a secure connection or not. Recognized values are 'true', 'false', and 'sspi', which is equivalent to 'true'.

Max Pool Size 100 The maximum number of connections allowed in the pool. Min Pool Size 0 The minimum number of connections allowed in the pool. Network Library

-or-

Net 'dbmssocn' The network library used to establish a connection to an instance of SQL Server. Supported values include dbnmpntw (Named Pipes), dbmsrpcn (Multiprotocol), dbmsadsn (Apple Talk), dbmsgnet (VIA), dbmsipcn (Shared Memory) and dbmsspxn (IPX/SPX), and dbmssocn (TCP/IP).

The corresponding network DLL must be installed on the system to which you connect. If you do not specify a network and you use a local server (for example, "." or "(local)"), shared memory is used.

Packet Size 8192 Size in bytes of the network packets used to communicate with an instance of SQL Server.

Password

-or-

Pwd The password for the SQL Server account logging on.

Persist Security Info 'false' When set to 'false', security-sensitive information, such as the password, is not returned as part of the connection if the connection is open or has ever been in an open state. Resetting the connection string resets all connection string values including the password.

Pooling 'true' When true, the SQLConnection object is drawn from the appropriate pool, or if necessary, is created and added to the appropriate pool. User ID The SQL Server login account.

Workstation ID the local computer name The name of the workstation connecting to SQL Server.

Note

Use ; to separate each property.

If a name occurs more than once, the value from the last one in the connectionstring will be used.

If you are building your connectionstring in your app using values from user input fields, make sure the user can't change the connectionstring by inserting an additional property with another value within the user value.

Access

ODBC

Standard Security:

"Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\mydatabase.mdb;Uid=Admin;Pwd=;"

Workgroup:

"Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\mydatabase.mdb;SystemDB=C:\mydatabase.mdw;" Exclusive:

"Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\mydatabase.mdb;Exclusive=1;Uid=admin;Pwd="

OLE DB, OleDbConnection (.NET)

Standard security:

"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\somepath\mydb.mdb;User Id=admin;Password=;"

Workgroup (system database):

"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\somepath\mydb.mdb;Jet OLEDB:System Database=system.mdw;"

With password:

"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\somepath\mydb.mdb;Jet OLEDB:Database Password=MyDbPassword;"

Oracle

ODBC

New version:

"Driver={Microsoft ODBC for Oracle};Server=OracleServer.world;Uid=Username;Pwd=asdasd;"

Old version:

"Driver={Microsoft ODBC Driver for Oracle};ConnectString=OracleServer.world;Uid=myUsername;Pwd=myPassw ord;"

OLE DB, OleDbConnection (.NET)

Standard security:

"Provider=msdaora;Data Source=MyOracleDB;User Id=UserName;Password=asdasd;"

This one's from Microsoft, the following are from Oracle

Standard Security:

"Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;User Id=Username;Password=asdasd;"

Trusted Connection:

"Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;OSAuthent=1;"

OracleConnection (.NET)

Standard:

"Data Source=MyOracleDB;Integrated Security=yes;"

This one works only with Oracle 8i release 3 or later

Specifying username and password:

"Data Source=MyOracleDB;User Id=username;Password=passwd;Integrated Security=no;"

This one works only with Oracle 8i release 3 or later

Declare the OracleConnection:

C#:

using System.Data.OracleClient;

OracleConnection oOracleConn = new OracleConnection();

oOracleConn.ConnectionString = "my connectionstring";

oOracleConn.Open();

https://www.360docs.net/doc/4819079157.html,:

Imports System.Data.OracleClient

Dim oOracleConn As OracleConnection = New OracleConnection() oOracleConn.ConnectionString = "my connectionstring"

oOracleConn.Open()

Missing the System.Data.OracleClient namespace? Download .NET Managed Provider for Oracle ?

Great article! "Features of Oracle Data Provider for .NET" by Rama Mohan G. at C# Corner

Core Labs OraDirect (.NET)

Standard:

"User ID=scott; Password=tiger; Host=ora; Pooling=true; Min Pool Size=0;Max Pool Size=100; Connection Lifetime=0"

Read more at Core Lab and the product page.

Data Shape

MS Data Shape:

"Provider=MSDataShape.1;Persist Security Info=False;Data Provider=MSDAORA;Data Source=orac;user id=username;password=mypw" Want to learn data shaping? Check out 4GuyfFromRolla's great article about Data Shaping >>

MySQL

ODBC

ODBC 2.50 Local database:

"Driver={mySQL};Server=localhost;Option=16834;Database=mydatabase;"

ODBC 2.50 Remote database:

"Driver={mySQL};Server=https://www.360docs.net/doc/4819079157.html,;Port=3306;Option=131072;Stm t=;Database=my-database;Uid=username;Pwd=password;"

ODBC 3.51 Local database:

"DRIVER={MySQL ODBC 3.51 Driver};SERVER=localhost;DATABASE=myDatabase;USER=myUsername;PAS SWORD=myPassword;OPTION=3;"

ODBC 3.51 Remote database:

"DRIVER={MySQL ODBC 3.51 Driver};SERVER=https://www.360docs.net/doc/4819079157.html,;PORT=3306;DATABASE=myDatabase;US ER=myUsername;PASSWORD=myPassword;OPTION=3;"

OLE DB, OleDbConnection (.NET)

Standard:

"Provider=MySQLProv;Data Source=mydb;User Id=UserName;Password=asdasd;"

MySqlConnection (.NET)

eInfoDesigns.dbProvider:

"Data Source=server;Database=mydb;User ID=username;Password=pwd;Command Logging=false"

This one is used with eInfoDesigns dbProvider, an add-on to .NET

Declare the MySqlConnection:

C#:

using eInfoDesigns.dbProvider.MySqlClient;

MySqlConnection oMySqlConn = new MySqlConnection();

oMySqlConn.ConnectionString = "my connectionstring";

oMySqlConn.Open();

https://www.360docs.net/doc/4819079157.html,:

Imports eInfoDesigns.dbProvider.MySqlClient

Dim oMySqlConn As MySqlConnection = New MySqlConnection() oMySqlConn.ConnectionString = "my connectionstring"

oMySqlConn.Open()

SevenObjects MySqlClient (.NET)

Standard:

"Host=server; UserName=myusername; Password=mypassword;Database=mydb;"

This is a freeware https://www.360docs.net/doc/4819079157.html, data provider from SevenObjects

Core Labs MySQLDirect (.NET)

Standard:

"User ID=root; Password=pwd; Host=localhost; Port=3306; Database=test;Direct=true; Protocol=TCP; Compress=false; Pooling=true; Min Pool Size=0;Max Pool Size=100; Connection Lifetime=0"

Read more at Core Lab and the product page.

Interbase

ODBC, Easysoft

Local computer:

"Driver={Easysoft IB6 ODBC};Server=localhost;Database=localhost:C:\mydatabase.gdb;Uid=usern ame;Pwd=password"

Remote Computer:

"Driver={Easysoft IB6 ODBC};Server=ComputerName;Database=ComputerName:C:\mydatabase.g db;Uid=username;Pwd=password"

Read more about this driver: Easysoft ODBC-Interbase driver >>

ODBC, Intersolv

Local computer:

"Driver={INTERSOLV InterBase ODBC Driver (*.gdb)};Server=localhost;Database=localhost:C:\mydatabase.gdb;Uid=user name;Pwd=password"

Remote Computer:

"Driver={INTERSOLV InterBase ODBC Driver (*.gdb)};Server=ComputerName;Database=ComputerName:C:\mydatabase. gdb;Uid=username;Pwd=password"

This driver are provided by DataDirect Technologies >> (formerly Intersolv) OLE DB, SIBPROvider

Standard:

"provider=sibprovider;location=localhost:;data

source=c:\databases\gdbs\mygdb.gdb;user

id=SYSDBA;password=masterkey"

Specifying character set:

"provider=sibprovider;location=localhost:;data

source=c:\databases\gdbs\mygdb.gdb;user

id=SYSDBA;password=masterkey;character set=ISO8859_1"

Specifying role:

"provider=sibprovider;location=localhost:;data

source=c:\databases\gdbs\mygdb.gdb;user

id=SYSDBA;password=masterkey;role=DIGITADORES"

Read more about SIBPROvider >>

Read more about connecting to Interbase in this Borland Developer Network article https://www.360docs.net/doc/4819079157.html,/article/0,1410,27152,00.html

IBM DB2

OLE DB, OleDbConnection (.NET) from ms

TCP/IP:

"Provider=DB2OLEDB;Network Transport Library=TCPIP;Network Address=XXX.XXX.XXX.XXX;Initial Catalog=MyCtlg;Package Collection=MyPkgCol;Default Schema=Schema;User ID=MyUser;Password=MyPW"

APPC:

"Provider=DB2OLEDB;APPC Local LU Alias=MyAlias;APPC Remote LU Alias=MyRemote;Initial Catalog=MyCtlg;Package Collection=MyPkgCol;Default Schema=Schema;User ID=MyUser;Password=MyPW"

IBM's OLE DB Provider (shipped with IBM DB2 UDB v7 or above)

TCP/IP:

Provider=IBMDADB2;Database=sample;HOSTNAME=db2host;PROTOCOL=TC PIP;PORT=50000;uid=myUserName;pwd=myPwd;

ODBC

Standard:

"driver={IBM DB2 ODBC DRIVER};Database=myDbName;hostname=myServerName;port=myPortNu m;protocol=TCPIP; uid=myUserName; pwd=myPwd"

Sybase

ODBC

Standard Sybase System 12 (or 12.5) Enterprise Open Client:

"Driver={SYBASE ASE ODBC Driver};Srvr=Aron1;Uid=username;Pwd=password"

Standard Sybase System 11:

"Driver={SYBASE SYSTEM 11};Srvr=Aron1;Uid=username;Pwd=password;" Do you know a userguide for Sybase System 11, 12, 12.5? E-mail the URL to https://www.360docs.net/doc/4819079157.html, now!! >>

Intersolv 3.10:

"Driver={INTERSOLV 3.10 32-BIT Sybase};Srvr=Aron1;Uid=username;Pwd=password;"

Sybase SQL Anywhere (former Watcom SQL ODBC driver):

"ODBC; Driver=Sybase SQL Anywhere 5.0; DefaultDir=c:\dbfolder\;Dbf=c:\mydatabase.db;Uid=username;Pwd=passwor d;Dsn="""""

Note! The two double quota following the DSN parameter at the end are escaped quotas (VB syntax), you may have to change this to your language specific escape syntax. The empty DSN parameter is indeed critical as not including it will result in error 7778.

Read more in the Sybase SQL Anywhere User Guide >>

OLE DB

Adaptive Server Anywhere (ASA):

"Provider=ASAProv;Data source=myASA"

Read more in the ASA User Guide >>

Adaptive Server Enterprise (ASE) with Data Source .IDS file:

"Provider=Sybase ASE OLE DB Provider; Data source=myASE"

Note that you must create a Data Source .IDS file using the Sybase Data Administrator. These .IDS files resemble ODBC DSNs.

Adaptive Server Enterprise (ASE):

"Provider=Sybase.ASEOLEDBProvider;Srvr=myASEserver,5000;Catalog=myD Bname;User Id=username;Password=password"

- some reports on problem using the above one, try the following as an alternative -

"Provider=Sybase.ASEOLEDBProvider;Server

Name=myASEserver,5000;Initial Catalog=myDBname;User Id=username;Password=password"

This one works only from Open Client 12.5 where the server port number feature works,燼llowing fully qualified connection strings to be used without defining燼ny .IDS Data Source files.

AseConnection (.NET)

Standard:

"Data

Source='myASEserver';Port=5000;Database='myDBname';UID='username';P WD='password';"

Declare the AseConnection:

C#:

using Sybase.Data.AseClient;

AseConnection oCon = new AseConnection();

oCon.ConnectionString="my connection string";

oCon.Open();

https://www.360docs.net/doc/4819079157.html,:

Imports System.Data.AseClient

Dim oCon As AseConnection = New AseConnection()

oCon.ConnectionString="my connection string"

oCon.Open()

Informix

ODBC

Informix 3.30:

"Dsn='';Driver={INFORMIX 3.30 32 BIT};Host=hostname;Server=myserver;Service=service-name;Protocol=olso ctcp;Database=mydb;UID=username;PWD=myPwd

Informix-CLI 2.5:

"Driver={Informix-CLI 2.5 (32 Bit)};Server=myserver;Database=mydb;Uid=username;Pwd=myPwd"

OLE DB

IBM Informix OLE DB Provider:

"Provider=Ifxoledbc.2;password=myPw;User ID=myUser;Data Source=dbName@serverName;Persist Security Info=true"

Ingres

ODBC

DSN-less

"Provider=MSDASQL.1;DRIVER=Ingres;SRVR=xxxxx;DB=xxxxx;Persist Security Info=False;uid=xxxx;pwd=xxxxx;SELECTLOOPS=N;Extended Properties="""SERVER=xxxxx;DATABASE=xxxxx;SERVERTYPE=INGRES"" Mimer SQL

ODBC

Standard Security:

"Driver={MIMER};Database=mydb;Uid=myuser;Pwd=mypw;"

Prompt for username and password:

"Driver={MIMER};Database=mydb;"

Lightbase

Standard

Standard:

"user=USERLOGIN;password=PASSWORD;UDB=USERBASE;server=SERVERN AME"

PostgreSQL

Core Labs PostgreSQLDirect (.NET)

Standard:

"User ID=root; Password=pwd; Host=localhost; Port=5432; Database=testdb;Pooling=true; Min Pool Size=0; Max Pool Size=100; Connection Lifetime=0"

Read more at Core Lab and the product page.

DSN

ODBC

DSN:

"DSN=myDsn;Uid=username;Pwd=;"

File DSN:

"FILEDSN=c:\myData.dsn;Uid=username;Pwd=;"

Firebird

ODBC - IBPhoenix Open Source

Standard:

"DRIVER=Firebird/InterBase(r)

driver;UID=SYSDBA;PWD=masterkey;DBNAME=D:\FIREBIRD\examples\TES T.FDB"

IBPhoenix ODBC; More info, download etc >>

.NET - Firebird .Net Data Provider

Standard:

"User=SYSDBA;Password=masterkey;Database=SampleDatabase.fdb;DataSo urce=localhost;Port=3050;Dialect=3;Charset=NONE;Role=;Connection lifetime=15;Pooling=true;MinPoolSize=0;MaxPoolSize=50;Packet

Size=8192;ServerType=0"

Firebird https://www.360docs.net/doc/4819079157.html, project >>

Firebird https://www.360docs.net/doc/4819079157.html, downloads >>

Excel

ODBC

Standard:

"Driver={Microsoft Excel Driver (*.xls)};DriverId=790;Dbq=C:\MyExcel.xls;DefaultDir=c:\mypath;"

TIP! SQL syntax: "SELECT * FROM [sheet1$]" - i.e. worksheet name followed by a "$" and wrapped in "[" "]" brackets.

OLE DB

Standard:

"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\MyExcel.xls;Extended Properties=""Excel 8.0;HDR=Yes;IMEX=1"""

"HDR=Yes;" indicates that the first row contains columnnames, not data "IMEX=1;" tells the driver to always read "intermixed" data columns as text TIP! SQL syntax: "SELECT * FROM [sheet1$]" - i.e. worksheet name followed by a "$" and wrapped in "[" "]" brackets.

Text

ODBC

Standard:

"Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq=c:\txtFilesFolder\;Extensions=asc,csv,tab,txt;"

OLE DB

Standard:

"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\txtFilesFolder\;Extended Properties=""text;HDR=Yes;FMT=Delimited"""

"HDR=Yes;" indicates that the first row contains columnnames, not data

DBF / FoxPro

ODBC

standard:

"Driver={Microsoft dBASE Driver (*.dbf)};DriverID=277;Dbq=c:\mydbpath;" OLE DB, OleDbConnection (.NET)

standard:

"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\folder;Extended Properties=dBASE IV;User ID=Admin;Password="

AS/400

OLE DB

IBM Client Access OLE DB provider:

"PROVIDER=IBMDA400; DATA SOURCE=MY_SYSTEM_NAME;Uid=myUserName;Pwd=myPwd"

Where MY_SYSTEM_NAME is the name given to the system connection in OperationsNavigator

ODBC

IBM Client Access ODBC driver:

"Driver={Client Access ODBC Driver (32-bit)};System=my_system_name;Uid=myUserName;Pwd=myPwd" Exchange

OLE DB

Exchange OLE DB provider:

"ExOLEDB.DataSource"

Specify store in the connection open command like this: conn.open "http://servername/mypublicstore"

Check out this article at msdn >> and this one at Addison-Wesley >>

Visual FoxPro

OLE DB, OleDbConnection (.NET)

Database container (.DBC):

"Provider=vfpoledb.1;Data

Source=C:\MyDbFolder\MyDbContainer.dbc;Collating Sequence=machine"

Free table directory:

"Provider=vfpoledb.1;Data Source=C:\MyDataDirectory\;Collating Sequence=general"

Force the provider to use an ODBC DSN:

""Provider=vfpoledb.1;DSN=MyDSN""

Read more (Microsoft msdn) >>

ODBC

Database container (.DBC):

"Driver={Microsoft Visual FoxPro Driver};SourceType=DBC;SourceDB=c:\myvfpdb.dbc;Exclusive=No;NULL=N O;Collate=Machine;BACKGROUNDFETCH=NO;DELETED=NO"