数据库连接字符串大全
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top - SQL Server
| - OLE DB, OleDbConnection (.NET)
| - 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)
| | - 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))
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| - SqlConnection (.NET)
| - Trusted Connection:
"Data Source=Aron1;Initial Catalog=pubs;Integrated Security=SSPI;"
- or -
"Server=Aron1;Database=pubs;Trusted_Connection=True;"
(both 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 connection string"; oSQLConn.Open();
VB.NET: Imports System.Data.SqlClient Dim oSQLConn As SqlConnection = New SqlConnection() oSQLConn.ConnectionString="my connection string" oSQLConn.Open()
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| - 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 >>
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| - Read more
- How to define which network protocol to use
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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
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- All SqlConnection connection string properties
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This table shows all connection string properties for the ADO.NET SqlConnection object. Most of the properties are also used in ADO. All properties and descriptions is from msdn.
Name | Default | Description |
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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 connection string will be used. If you are building your connection string in your app using values from user input fields, make sure the user can't change the connection string by inserting an additional property with another value within the user value.
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top - SQL Server 2005
- SQL Native Client ODBC Driver
| - SQL Native Client OLE DB Provider
| | | | | - Attach a database file on connect to a local SQL Server Express instance:
"Provider=SQLNCLI;Server=./SQLExpress;AttachDbFilename=c:/asd/qwe/mydbfile.mdf;Database=dbname;Trusted_Connection=Yes;"
- or -
"Provider=SQLNCLI;Server=./SQLExpress;AttachDbFilename=|DataDirectory|mydbfile.mdf;Database=dbname;Trusted_Connection=Yes;"
(use |DataDirectory| when your database file resides in the data directory)
Why is the "Database" parameter needed? Answer: If the database was previously attached, SQL Server does not reattach it (it uses the attached database as the default for the connection).
Download the SQL Native Client here >> (the package contains booth the ODBC driver and the OLE DB provider)
Using SQL Server 2005 Express? Don't miss the server name syntax: SERVERNAME/SQLEXPRESS (Substitute "SERVERNAME" with the name of the computer)
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| - SqlConnection (.NET)
| | - 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))
| | - Attach a database file on connect to a local SQL Server Express instance:
"Server=./SQLExpress;AttachDbFilename=c:/asd/qwe/mydbfile.mdf;Database=dbname;Database=dbname;Trusted_Connection=Yes;"
- or -
"Server=./SQLExpress;AttachDbFilename=|DataDirectory|mydbfile.mdf;Database=dbname;Trusted_Connection=Yes;"
(use |DataDirectory| when your database file resides in the data directory)
Why is the "Database" parameter needed? Answer: If the database was previously attached, SQL Server does not reattach it (it uses the attached database as the default for the connection).
| - Using "User Instance" on a local SQL Server Express instance:
"Data Source=./SQLExpress;integrated security=true;attachdbfilename=|DataDirectory|/mydb.mdf;user instance=true;"
The "User Instance" functionality creates a new SQL Server instance on the fly during connect. This works only on a local SQL Server 2005 instance and only when connecting using windows authentication over local named pipes. The purpose is to be able to create a full rights SQL Server instance to a user with limited administrative rights on the computer. To enable the functionality: sp_configure 'user instances enabled','1' (0 to disable)
Using SQL Server 2005 Express? Don't miss the server name syntax: SERVERNAME/SQLEXPRESS (Substitute "SERVERNAME" with the name of the computer)
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| - Context Connection - connecting to "self" from within your CLR stored prodedure/function
| - Read more
- When to use SQL Native Client?
| - COM applications, all other then .Net applications
Use the SQL Native Client if you are accessing an SQL Server 2005 and need the new features of SQL Server 2005 such as MARS, encryption, XML data type etc. Continue use your current provider (OLE DB / ODBC through the MDAC package) if you are not connecting to an SQL Server 2005 (that's quite obvious eh..) or if you are connecting to an SQL Server 2005 but are not using any of the new SQL Server 2005 features.
For more details on the differences between MDAC and SQL Native Client, read this msdn article >>
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top - Access
| - OLE DB, OleDbConnection (.NET)
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top - Oracle
| - 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
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| - 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 connection string"; oOracleConn.Open();
VB.NET: Imports System.Data.OracleClient Dim oOracleConn As OracleConnection = New OracleConnection() oOracleConn.ConnectionString = "my connection string" 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
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| - 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.
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| - 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 >>
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top - MySQL
| - OLE DB, OleDbConnection (.NET)
| - Connector/Net 1.0 (.NET)
| - Specifying port:
"Server=Server;Port=1234;Database=Test;Uid=UserName;Pwd=asdasd;"
Default port is 3306. Enter value -1 to use a named pipe connection.
| - Declare the MySqlClient connection:
C#: using MySql.Data.MySqlClient; MySqlConnection oMySqlConn = new MySqlConnection(); oMySqlConn.ConnectionString = "Server=Server;Database=Test;Uid=UserName;Pwd=asdasd;"; oMySqlConn.Open();
VB.NET: Imports MySql.Data.MySqlClient Dim oMySqlConn As MySqlConnection = New MySqlConnection() oMySqlConn.ConnectionString = "Server=Server;Database=Test;Uid=UserName;Pwd=asdasd;" oMySqlConn.Open()
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| - 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 connection string"; oMySqlConn.Open();
VB.NET: Imports eInfoDesigns.dbProvider.MySqlClient Dim oMySqlConn As MySqlConnection = New MySqlConnection() oMySqlConn.ConnectionString = "my connection string" oMySqlConn.Open()
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| - SevenObjects MySqlClient (.NET)
- Standard:
"Host=server; UserName=myusername; Password=mypassword;Database=mydb;"
This is a freeware ADO.Net data provider from SevenObjects
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| - 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.
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top - Interbase
- ODBC, Easysoft
| - Remote Computer:
"Driver={Easysoft IB6 ODBC};Server=ComputerName;Database=ComputerName:C:/mydatabase.gdb;Uid=username;Pwd=password"
Read more about this driver: Easysoft ODBC-Interbase driver >>
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| - ODBC, Intersolv
| - 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)
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| - OLE DB, SIBPROvider
| | - Specifying role:
"provider=sibprovider;location=localhost:;data source=c:/databases/gdbs/mygdb.gdb;user id=SYSDBA;password=masterkey;role=DIGITADORES"
Read more about SIBPROvider >>
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| Read more about connecting to Interbase in this Borland Developer Network article http://community.borland.com/article/0,1410,27152,00.html |
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top - IBM DB2
- OLE DB, OleDbConnection (.NET) from ms
| - IBM's OLE DB Provider (shipped with IBM DB2 UDB v7 or above)
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top - Sybase
| - OLE DB
- Adaptive Server Anywhere (ASA):
| - 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=myDBname;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.
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| - AseConnection (.NET)
| - Declare the AseConnection:
C#: using Sybase.Data.AseClient; AseConnection oCon = new AseConnection(); oCon.ConnectionString="my connection string"; oCon.Open();
VB.NET: Imports System.Data.AseClient Dim oCon As AseConnection = New AseConnection() oCon.ConnectionString="my connection string" oCon.Open()
Read more! Adaptive Server Enterprise ADO.NET Data Provider Documentation >>
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top - 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.
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| | - Npgsql by pgFoundry (.NET)
| - Without SSL:
"Server=127.0.0.1;Port=5432;Userid=myuserid;password=mypw;Protocol=3;SSL=false;Pooling=true;MinPoolSize=1; MaxPoolSize=20;Encoding=UNICODE;Timeout=15;SslMode=Disable"
Read more in the Npgsql: User's Manual and on the pgFoundry website.
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top - Firebird
- ODBC - IBPhoenix Open Source
| - .NET - Firebird .Net Data Provider
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top - Excel
| - 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.
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top - Text
| - 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
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top - DBF / FoxPro
| - OLE DB, OleDbConnection (.NET)
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top - AS/400 (iSeries)
- OLE DB, OleDbConnection (.NET)
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top - Visual FoxPro
- OLE DB, OleDbConnection (.NET)
| - ODBC
| - Free Table directory:
"Driver={Microsoft Visual FoxPro Driver};SourceType=DBF;SourceDB=c:/myvfpdbfolder;Exclusive=No;Collate=Machine;NULL=NO;DELETED=NO;BACKGROUNDFETCH=NO"
"Collate=Machine" is the default setting, for other settings check the list of supported collating sequences >>
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原文出处:http://www.connectionstrings.com/ 为方便查阅,做了简单整理。
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