C＃学习笔记----C＃连接MySQL数据库

using System.Linq;
using System.Text;
using System.Data;// 引用表的命名空间
using System.Data.SqlClient;


namespace ConnectMySQL
{
    
    internal class Program
    {
    
        static void Main(string[] args)
        {
    
            Console.WriteLine("输入学号：");

            //第一步，声明一个连接的对象字符串
            //连接数据库
            SqlConnectionStringBuilder scsb = new SqlConnectionStringBuilder();

            scsb.DataSource = "127.0.0.1";   //地址
            scsb.UserID = "bigEric"; // 账号名
            scsb.Password = "123456";//登录密码
            scsb.InitialCatalog = "table1";//表名

            SqlConnection sqlCon = new SqlConnection(scsb.ToString());
            //判断是否已有连被打开接
            if (sqlCon.State==ConnectionState.Closed)
            {
    
                sqlCon.Open();
            }
            string stu_no = Console.ReadLine();

            //要使用的SQL语句 
            string sqlStr = "SELECT * FROM students WHERE 学号= '" + stu_no + "'";

            //创建SQL语句的执行
            SqlCommand sqlCommand =new SqlCommand(sqlStr,sqlCon);
            SqlDataReader sdr = null;

            try
            {
    
                sdr = sqlCommand.ExecuteReader();
                while (sdr.Read())
                {
    
                    Console.WriteLine("姓名：" + sdr["姓名"].ToString());
                    Console.WriteLine("班级：" + sdr["班级"].ToString());
                    Console.WriteLine("性别：" + sdr["性别"].ToString());
                    Console.WriteLine("年龄：" + sdr["年龄"].ToString());
                    Console.WriteLine("----------------");
                }

            }
            catch (Exception ex)
            {
    
                Console.WriteLine(ex.Message);
                throw;
            }
            //最后记得关闭数据库
            finally
            {
    
                sqlCon.Close();
            }



        }
    }
}