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using System.Data;
using System.Data.OleDb;
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string strConnection="Provider=Microsoft.Jet.OleDb.4.0;";
strConnection+=@"Data Source=C:\BegASPNET\Northwind.mdb";
OleDbConnection objConnection=new OleDbConnection(strConnection);
......
objConnection.Open();
objConnection.Close();
......
 
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using System.Data;
using System.Data.SqlClient;
...
string strConnection="user id=sa;password=;";
strConnection+="initial catalog=Northwind;Server=YourSQLServer;";
strConnection+="Connect Timeout=30";
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