using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//使用ADO.NET技术，必须要导入这两个命名空间
using System.Data;
using System.Data.SqlClient;
//
namespace ADO.NET1
{
  class Program
  {
    static void Main(string[] args)
    {
      //创建数据库连接(连接字符串)
      string sqlCon = "server=.;database=DB_MyStudentLife;uid=sa;pwd=Password_1";
      SqlConnection scon = new SqlConnection(sqlCon);

      //打开数据库连接
       scon.Open();

      //测试，判断数据库的连接状态
      if (scon.State == ConnectionState.Closed)
      {
        
        Console.WriteLine("连接数据库失败");
      }
      if (scon.State == ConnectionState.Open)
      {
        Console.WriteLine("成功打开连接数据库，连接成功");
      }
      Console.ReadKey();
    }
  }
}