Connecting with Different Database Servers in .Net

Today, we will see how to connect with Different Databases in Ado.Net Framework.

1. For  SQL Server

Using ODBC
-------------

 // ODBC -- Standard Connection
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = "Driver={SQL Server}; Server=ServerName; DataBase=DataBaseName; Uid=UserName; Pwd=Secret";
conn.Open();

 // ODBC -- Trusted Connection
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = "Driver={SQL Server}; Server=ServerName; DataBase=DataBaseName; Uid=admin; Pwd=password";
conn.Open();
// or

OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = "Driver={SQL Server}; Server=ServerName; DataBase=DataBaseName; Trusted_Connection=Yes;";
conn.Open();

Using OLEDB
---------------------

 // OleDb -- Standard Connection
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Driver=SQLOLEDB; Data Source=ServerName; Initial Catalog=DataBaseName; User id=UserName; Password=Secret;";
conn.Open();
 // OleDb -- Trusted Connection
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Driver=SQLOLEDB; Data Source=ServerName; Initial Catalog=DataBaseName; Integrated Security=SSPI;";
conn.Open();

Using .Net DataProvider
------------------------------

 // .NET DataProvider -- Standard Connection
using System.Data.SqlClient;
SqlConnection conn = new SqlDbConnection();
conn.ConnectionString ="Data Source=ServerName; Initial Catalog=DataBaseName; User id=UserName; Password=Secret;";
conn.Open();
 // .NET DataProvider -- Trusted Connection
using System.Data.SqlClient;
SqlConnection conn = new SqlConnection();
conn.ConnectionString = "Data Source=ServerName; Initial Catalog=DataBaseName; Integrated Security=SSPI;";
conn.Open();

2. For Oracle

Using ODBC
---------------------

 // ODBC -- New Microsoft Driver

using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = "Driver={Microsoft ODBC for Oracle};Server=OracleServer.world;Uid=UserName;Pwd=Secret;";
conn.Open();

 // ODBC -- Oracle Driver

using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = "Driver={Oracle ODBC Driver};Dbq=myDataBase;Uid=UserName;Pwd=Secret;";
conn.Open();

Using OLEDB

 // OleDb -- Oracle Driver -- Standard Connection
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Driver=OraOLEDB.Oracle;Data Source=ServerName;User id=UserName;Password=Secret;";
conn.Open();

 // OleDb -- Oracle Driver -- Trusted Connection
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Driver=OraOLEDB.Oracle;Data Source=ServerName;OSAuthent=1;";
conn.Open();
// or
using System.Data.OleDb;

OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Driver=OraOLEDB.Oracle;Data Source=ServerName;User id=admin;Password=pwd";
conn.Open();

3. For DB2

Using ODBC
-------------
 // ODBC without DSN
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = "Driver={IBM DB2 ODBC DRIVER};DataBase=DataBaseName; HostName=ServerName; Protocol=TCPIP;Port=PortNumber;Uid=UserName;Pwd=Secret";
conn.Open();

Using OLEDB
--------------

 // OleDb -- Microsoft Driver
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Driver=DB2OLEDB; Network Transport Library=TCPIP; Network Address=xxx.xxx.xxx.xxx; Package Collection=CollectionName; Initial Catalog=DataBaseName; User id=UserName; Password=Secret;";
conn.Open();

// OleDb -- IBM Driver
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Driver=IBMDADB2; DataBase=DataBaseName; HostName=ServerName; Protocol=TCPIP; Port=PortNumber; Uid=UserName; Pwd=Secret;";
conn.Open();

Using .Net DataProvider
-----------------------
 // .NET DataProvider from IBM
using IBM.Data.DB2;
Db2Connection conn = new Db2Connection();
conn.ConnectionString = "DataBase=DataBaseName;Uid=UserName;Pwd=Secret";

conn.Open();

4. For MySQL

Using ODBC
------------
 // ODBC -- MyODBC Driver -- remote database
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = "Driver={MySql}; Server=db.domain.com; Option=131072; Port=3306; Stmt=; DataBase=DataBaseName; Uid=UserName; Pwd=Secret;" ;
conn.Open();

Using OLEDB
------------
 // OleDb
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Provider=MySqlProv; Data Source=ServerName; User id=UserName; Password=Secret";
conn.Open();

Using .Net DataProvider
------------------------

 // .NET DataProvider from CoreLab
using CoreLab.MySql;
MySqlConnection conn = new MySqlConnection();
conn.ConnectionString ="Host=ServerName; DataBase=DataBaseName; Protocol=TCP; Port=3306; Direct=true; Compress=false; Pooling=true; Min Pool Size=0; Max Pool Size=100; Connection Lifetime=0; User id=UserName;Password=Secret";

conn.Open();

5. For Microsoft Access

Using ODBC
--------------
 // ODBC -- Standard Security
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = "Driver={Microsoft Access Driver (*.mdb)}; Dbq=c:\myPath\myDb.mdb; Uid=Admin; Pwd=;password";
conn.Open();

 // ODBC -- Workgroup (System Database)
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = "Driver={Microsoft Access Driver (*.mdb)}; Dbq=c:\myPath\myDb.mdb; SystemDb=c:\myPath\myDb.mdw;";
conn.Open();

Using OLEDB
-------------

 // OleDb with MS Jet -- Standard Security
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=c:\mypath\myDb.mdb; User id=admin;Password=password";
conn.Open();
 // OleDb with MS Jet -- Workgroup (System Database)
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=c:\mypath\myDb.mdb; System Database=c:\mypath\myDb.mdw";
conn.Open();

Summary :

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