WPF基础系列十一：C# 导入/读取Mysql数据

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前言

使用Mysql数据库存取用户数据，实例参考：WPF实例系列一：登录、注册界面设计；对比参考WPF基础系列八：C# 导入/读取excel数据

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一、构建mysql存取数据类

引入NuGet程序集MySql.Data，构建Mysql_Code类，实现mysql数据库的存取数据

using System;
using System.Collections;
using System.Data;
using System.Windows;
//引入MySQL
using MySql.Data.MySqlClient;

namespace sample5
{
   
    public class Mysql_Code
    {
   
        static string constring = "server = 'localhost'; uid = 'root'; pwd = 'djz19960824'; database = 'test';";   //定义连接mysql字符串
        MySqlConnection sqlCnn = new MySqlConnection(constring);    //连接mysql

        #region 读取Mysql数据库信息
        public Hashtable Mysql_read()
        {
   
            string username;
            string password;
            string cmdstring = "select * from code";    //写入sql
            MySqlCommand sqlCmd = new MySqlCommand(cmdstring, sqlCnn);   //创建命令对象  
            Hashtable h = new Hashtable();

            try
            {
   
                sqlCnn.Open();  //打开数据库
                MySqlDataReader rec = sqlCmd.ExecuteReader();

                while (rec.Read())
                {
   
                    username = rec.GetString(0);
                    password = rec.GetString(1);
                    h.