C#使用ODBC与OLEDB连接数据库的方法示例

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);
    }
  }
}