常用数据库连接

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"
       (both 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;"
       (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 ōSQLConn = 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()

    
    
    

•  Data Shape
  
  
  •  MS Data Shape
    "Provider=MSDataShape;Data Provider=SQLOLEDB;Data Source=Aron1;Initial Catalog=pubs;User ID=sa;Password=asdasd;"

•  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 syntaxNetwork Library=dbmssocn
      and when connecting through MSDASQL provider use the syntaxNetwork=dbmssocn
      
      
  •  All SqlConnection connection string properties
    
    
    • 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 descrīptions is from msdn.
      
      

      Name	Default	Descrīption
      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.

•  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=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;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 ōOracleConn = new OracleConnection();
      oOracleConn.ConnectionString = "my connection string";
      oOracleConn.Open();

      
      
      

      VB.NET:
      Imports System.Data.OracleClient
      Dim oOracleConn As ōracleConnection = New OracleConnection()
      oOracleConn.ConnectionString = "my connection string"
      oOracleConn.Open()

  •  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"

   

  •  Data Shape
    
    
    •  MS Data Shape:
      "Provider=MSDataShape.1;Persist Security Info=False;Data Provider=MSDAORA;Data Source=orac;user id=username;password=mypw"
    •  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=TCPIP;PORT=50000;uid=myUserName;pwd=myPwd;
          
          
          
      •  ODBC
        
        
        •  Standard:
          
          "driver={IBM DB2 ODBC DRIVER};Database=myDbName;hostname=myServerName;port=myPortNum;protocol=TCPIP; uid=myUserName; pwd=myPwd"