C#中的ODBC、OLEDB连接

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

namespace ODBCtest
{
class Program
{
static void Main(string[] args)
{
//ODBC连接
string conString = "DSN=tian"; //tian表示ODBC的用户数据源名
string sql = "select count(*) from stuinfo"; //stuinfo为用户数据源绑定的数据库中的一个表
OdbcConnection con = new OdbcConnection(conString);
con.Open();
OdbcCommand com = new OdbcCommand(sql, con);
int i = Convert.ToInt32(com.ExecuteScalar());
Console.WriteLine(i);

//OLEDB连接
string conString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\tian.mdb"; //连接Access数据库
string sql = "select count(*) from stuinfo";
OleDbConnection con = new OleDbConnection(conString);
con.Open();
OleDbCommand com = new OleDbCommand(sql, con);
int i = Convert.ToInt32(com.ExecuteScalar());
Console.WriteLine(i);
}
}
}