c#连接数据库代码集合

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=ye s;"
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;Pass word=asdasd;"
trusted Connection:
"Provider=sqloledb;Data Source=Aron1;Initial Catalog=pubs;Integrated Secu rity=SSPI;"
(use serverName\instanceName as Data Source to use an specifik SQLServe r 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=DB MSSOCN;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_Conne ction=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 SQLServe r instance, only SQLServer2000)
connect via an IP address:
"Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Ca talog=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();
:
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;Initia l 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=DB MSSOCN;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 L ibrary=dbmssocn
and when connecting through MSDASQL provider use the syntax Network=d bmssocn
All SqlConnection connectionstring properties
This table shows all connectionstring properties for the SqlConnect ion 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 Pro vider' if no application name is provided.
AttachDBFilename
-or-
extended properties
-or-
Initial File Name The name of the primary file, including the full path nam e, of an attachable database. The database name must be specified with th e keyword 'database'.
Connect Timeout
-or-
Connection Timeout 15 The length of time (in seconds) to wait for a conne ction to the server before terminating the attempt and generating an error.
Connection Lifetime 0 When a connection is returned to the pool, its creatio n time is compared with the current time, and the connection is destroyed if that time span (in seconds) exceeds the value specified by connection life time. Useful in clustered configurations to force load balancing between a r unning server and a server just brought on-line.
Connection Reset 'true' Determines whether the database connection is rese t when being removed from the pool. Setting to 'false' avoids making an a dditional server round-trip when obtaining a connection, but the programme r 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 Ser
ver to which to connect.
Enlist 'true' When true, the pooler automatically enlists the connection in th e 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 connec tion or not. Recognized values are 'true', 'false', and 'sspi', which is equival ent to 'true'.
Max Pool Size 100 The maximum number of connections allowed in the poo l.
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 ins tance of SQL Server. Supported values include dbnmpntw (Named Pipes), d bmsrpcn (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 y ou 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 communicat e 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 informatio n, such as the password, is not returned as part of the connection if the co nnection is open or has ever been in an open state. Resetting the connecti on string resets all connection string values including the password. Pooling 'true' When true, the SQLConnection object is drawn from the appr opriate 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 conn ecting to SQL Server.
note
Use ; to separate each property.
If a name occurs more than once, the value from the last one in the conne ctionstring will be used.
If you are building your connectionstring in your app using values from use r input fields, make sure the user can't change the connectionstring by inse rting an additional property with another value within the user value.
Access
ODBC
standard Security:
"Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\mydatabase.mdb;Uid=A dmin;Pwd=;"
workgroup:
"Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\mydatabase.mdb;Syste mDB=C:\mydatabase.mdw;"
exclusive:
"Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\mydatabase.mdb;Exclusi ve=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 O LEDB:System Database=system.mdw;"
with password:
"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\somepath\mydb.mdb;Jet O LEDB:Database Password=MyDbPassword;"
Oracle
ODBC
new version:
"Driver={Microsoft ODBC for Oracle};Server=OracleServer.world;Uid=Userna me;Pwd=asdasd;"
old version:
"Driver={Microsoft ODBC Driver for Oracle};ConnectString=OracleServer.wor ld;Uid=myUsername;Pwd=myPassword;"
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;Pa ssword=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();
:
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=MSDAO
RA;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=;Port=3306;Option=131072;Stmt =;Database=my-database;Uid=username;Pwd=password;"
odbc 3.51 Local database:
"DRIVER={MySQL ODBC 3.51 Driver};SERVER=localhost;DATABASE=myDat abase;USER=myUsername;PASSWORD=myPassword;OPTION=3;"
odbc 3.51 Remote database:
"DRIVER={MySQL ODBC 3.51 Driver};SERVER=;PORT=330 6;DATABASE=myDatabase;USER=myUsername;PASSWORD=myPassword;OP TION=3;"
OLE DB, OleDbConnection (.NET)
standard:
"Provider=MySQLProv;Data Source=mydb;User Id=UserName;Password=asd asd;"
MySqlConnection (.NET)
einfodesigns.dbprovider:
"Data Source=server;Database=mydb;User ID=username;Password=pwd;Co mmand 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();
:
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=m ydb;"
this is a freeware 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:\myda tabase.gdb;Uid=username;Pwd=password"
remote Computer:
"Driver={Easysoft IB6 ODBC};Server=ComputerName;Database=ComputerN ame:C:\mydatabase.gdb;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;Data base=localhost:C:\mydatabase.gdb;Uid=username;Pwd=password"
remote Computer:
"Driver={INTERSOLV InterBase ODBC Driver (*.gdb)};Server=ComputerNam e;Database=ComputerName:C:\mydatabase.gdb;Uid=username;Pwd=passwo rd"
this driver are provided by DataDirect Technologies >> (formerly Intersolv) OLE DB, SIBPROvider
standard:
"provider=sibprovider;location=localhost:;data source=c:\databases\gdbs\my gdb.gdb;user id=SYSDBA;password=masterkey"
specifying character set:
"provider=sibprovider;location=localhost:;data source=c:\databases\gdbs\my gdb.gdb;user id=SYSDBA;password=masterkey;character set=ISO8859_1"
specifying role:
"provider=sibprovider;location=localhost:;data source=c:\databases\gdbs\my gdb.gdb;user id=SYSDBA;password=masterkey;role=DIGITADORES"
Read more about SIBPROvider >>
read more about connecting to Interbase in this Borland Developer Network article /article/0,1410,27152,00.html
IBM DB2
OLE DB, OleDbConnection (.NET) from ms
tcp/ip:
"Provider=DB2OLEDB;Network Transport Library=TCPIP;Network Address=X XX.XXX.XXX.XXX;Initial Catalog=MyCtlg;Package Collection=MyPkgCol;Defaul t 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 Sche ma=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=TCP IP;PORT=50000;uid=myUserName;pwd=myPwd;
ODBC
standard:
"driver={IBM DB2 ODBC DRIVER};Database=myDbName;hostname=myServ erName;port=myPortNum;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=passw ord"
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 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=password;Dsn="""""
note! The two double quota following the DSN parameter at the end are es caped quotas (VB syntax), you may have to change this to your language specific escape syntax. The empty DSN parameter is indeed critical as not i ncluding 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 A dministrator. 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 f eature 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='userna me';PWD='password';"
declare the AseConnection:
C#:
using Sybase.Data.AseClient;
AseConnection oCon = new AseConnection();
oCon.ConnectionString="my connection string";
oCon.Open();
:
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=olsoctcp;Database=mydb;UID=username;PW D=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=dbNa me@serverName;Persist Security Info=true"
Ingres
ODBC
dsn-less
"Provider=MSDASQL.1;DRIVER=Ingres;SRVR=xxxxx;DB=xxxxx;Persist Securi ty 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=testd b;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;DBNAM E=D:\FIREBIRD\examples\TEST.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 lifetim e=15;Pooling=true;MinPoolSize=0;MaxPoolSize=50;Packet Size=8192;Server Type=0"
Firebird project >>
Firebird downloads >>
Excel
ODBC
standard:
"Driver={Microsoft Excel Driver (*.xls)};DriverId=790;Dbq=C:\MyExcel.xls;D efaultDir=c:\mypath;"
tip! SQL syntax: "SELECT * FROM [sheet1$]" - i.e. worksheet name followe d by a "$" and wrapped in "[" "]" brackets.
OLE DB
standard:
"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\MyExcel.xls;Extended Pro perties=""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$]" - i.e. worksheet name followe d by a "$" and wrapped in "[" "]" brackets.
Text
ODBC
standard:
"Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq=c:\txtFilesFolder\;Extensi ons=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 Propertie s=dBASE IV;User ID=Admin;Password="
AS/400
OLE DB
ibm Client Access OLE DB provider:
"PROVIDER=IBMDA400; DATA SOURCE=MY_SYSTEM_NAME;Uid=myUserNam e;Pwd=myPwd"
Where MY_SYSTEM_NAME is the name given to the system connection in O perationsNavigator
ODBC
ibm Client Access ODBC driver:
"Driver={Client Access ODBC Driver (32-bit)};System=my_system_name;Ui d=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;Collati ng 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:\my vfpdb.dbc;Exclusive=No;NULL=NO;Collate=Machine;BACKGROUNDFETCH=NO; DELETED=NO"
free Table directory:
"Driver={Microsoft Visual FoxPro Driver};SourceType=DBF;SourceDB=c:\my vfpdbfolder;Exclusive=No;Collate=Machine;NULL=NO;DELETED=NO;BACKGR OUNDFETCH=NO"
"collate=machine" is the default setting, for other settings check the list of supported collating sequences >>
microsoft Visual Foxpro site: /vfoxpro
Pervasive
ODBC
standard:
"Driver={Pervasive ODBC Client Interface};ServerName=srvname;dbq=@db name"
Pervasive ODBC info >>
OLE DB
standard:
"Provider=PervasiveOLEDB;Data Source=C:\path"
Pervasive OLE DB info >>
UDL
UDL
udl:
"File Name=c:\myDataLink.udl;"。