C＃连接数据库完成增删改查操作

---

前言

介绍C#连接数据库完成增删改查操作

---

一、下载

1、下载程序包

选择菜单栏工具->NuGet包管理器->管理解决方案的NuGet程序包，选择浏览，输入MySql.Data,进行搜索并下载。

二、使用步骤

using System;using MySql.Data.MySqlClient;namespace Demo{    class Program    {        private static MySqlConnectionStringBuilder mysqlbuilder = new MySqlConnectionStringBuilder();        private static MySqlConnection mysqlconnection;        static void Main(String[] args)        {            mysqlbuilder.UserID = "root";            mysqlbuilder.Password = "123456";            mysqlbuilder.Server = "localhost";            mysqlbuilder.Database = "springboot";            mysqlconnection = new MySqlConnection(mysqlbuilder.ConnectionString);            mysqlconnection.Open();            //增加            /*Console.WriteLine("请输入用户名:");            string name = Console.ReadLine();            Console.WriteLine("请输入年龄:");            string age = Console.ReadLine();            string sql = "insert into users(name,age) values(@name,@age)";            MySqlCommand cmd = new MySqlCommand(sql, mysqlconnection);            cmd.Parameters.Add(new MySqlParameter("@name", name));            cmd.Parameters.Add(new MySqlParameter("@age", age));            int rows=cmd.ExecuteNonQuery();            if (rows == 1)            {                Console.WriteLine("注册成功!");            }            else            {                Console.WriteLine("注册失败!");            }*/            //删除            /* Console.WriteLine("请输入id:");             string id = Console.ReadLine();             string sql = "delete from users where [email protected]";             MySqlCommand cmd = new MySqlCommand(sql, mysqlconnection);             cmd.Parameters.Add(new MySqlParameter("@id", id));             int rows = cmd.ExecuteNonQuery();             if (rows < 0)             {                 Console.WriteLine("删除失败!");             }             else             {                 Console.WriteLine("删除成功!");             }             mysqlconnection.Close();*/            //修改            Console.WriteLine("请输入ID:");            string id = Console.ReadLine();            Console.WriteLine("请输入年龄:");            string age = Console.ReadLine();            string sql = "update users set [email protected] where [email protected]";            MySqlCommand cmd = new MySqlCommand(sql, mysqlconnection);            cmd.Parameters.Add(new MySqlParameter("@age", age));            cmd.Parameters.Add(new MySqlParameter("@id", id));            int rows = cmd.ExecuteNonQuery();            if (rows < 0)            {                Console.WriteLine("修改失败!");            }            else            {                Console.WriteLine("修改成功!");            }            mysqlconnection.Close();            //查询            /*   string sql = "select * from users";               MySqlCommand cmd = new MySqlCommand(sql, mysqlconnection);               MySqlDataReader reader = cmd.ExecuteReader();               Console.WriteLine("id\tname\tage");               while(reader.Read())               {                   Console.Write(reader.GetInt32(0) + "\t");                   if(reader.IsDBNull(1))                   {                       Console.Write("\t");                   }                   else                   {                       Console.Write(reader.GetString("name") + "\t");                   }                   if (reader.IsDBNull(2))                   {                       Console.Write(" ");                   }                   else                   {                       Console.WriteLine(reader.GetString(2) + "\t");                   }               }               mysqlconnection.Close();*/        }    }}

---

作者：盖世英雄tr

游戏编程，一个游戏开发收藏夹~

如果图片长时间未显示，请使用Chrome内核浏览器。