使用OLE DB数据提供程序访问MSSQL数据库

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.OleDb;

namespace OleDbProvider
{
class Program
{
static void Main(string[] args)
{
string connString = @"Provider=SQLOLEDB;Data Source=SNH;Password=123456;User ID=sa;Initial Catalog=Northwind";
string sql = @"select * from employees";
OleDbConnection conn = null;
OleDbDataReader reader = null;
try
{
conn = new OleDbConnection(connString);
conn.Open();

OleDbCommand cmd = new OleDbCommand(sql, conn);
reader = cmd.ExecuteReader();

Console.WriteLine("This program demonstrates the use of " + "the OLE DB Data Provider.");
Console.WriteLine("Querying database {0} with query {1}\n", conn.Database, cmd.CommandText);
Console.WriteLine("First Name\tLast Name\n");
while (reader.Read())
{
Console.WriteLine("{0} | {1}", reader["FirstName"].ToString().PadLeft(10), reader[1].ToString().PadLeft(10));
}
}
catch (Exception e)
{
Console.WriteLine("Error: " + e);
}
finally
{
reader.Close();
conn.Close();
}
Console.ReadKey();

}
}
}