文章目录
前言功能实现步骤一、获取QQ邮箱授权码二、功能界面三、创建发送邮箱验证码的类四、在From1中调用类中的函数，实现功能前言
在程序设计中，发送验证码是常见的一个功能，用户在注册账号或忘记密码时，通常需要发送验证码到手机或邮箱来验证身份，此篇博客介绍在C#WinForm中使用SMTP协议发送QQ邮箱验证码（其他邮箱方法类似）。
关于"发送手机验证码"，可以参考我这篇文章：使用SMS接口发送手机验证码
功能实现步骤
一、获取QQ邮箱授权码
授权码就是一个QQ邮箱推出的、长度为16位的、用于登录第三方客户端的专用密码。
获取QQ邮箱授权码的方法
二、功能界面
三、创建发送邮箱验证码的类
QQ邮箱的SMTP使用了SSL加密，必须启用SSL加密，并且指定端口才能发送。
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;//发送邮件需要引用的命名空间using .Mail;using ;using System.Text.RegularExpressions;using System.Windows.Forms;namespace MailVeriCode{public class MailVeriCodeClass{#region 邮箱验证码功能/// <summary>/// 生成随机验证码/// </summary>/// <param name="CodeLength">验证码长度</param>public static string CreateRandomMailCode(int CodeLength){int randNum;char code;string randomCode = String.Empty;//随机验证码//生成一定长度的随机验证码 //Random random = new Random();//生成随机数对象for (int i = 0; i < CodeLength; i++){//利用GUID生成6位随机数byte[] buffer = Guid.NewGuid().ToByteArray();//生成字节数组int seed = BitConverter.ToInt32(buffer, 0);//利用BitConvert方法把字节数组转换为整数Random random = new Random(seed);//以生成的整数作为随机种子randNum = random.Next();//randNum = random.Next();if (randNum % 3 == 1){code = (char)('A' + (char)(randNum % 26));//随机大写字母}else if (randNum % 3 == 2){code = (char)('a' + (char)(randNum % 26));//随机小写字母}else{code = (char)('0' + (char)(randNum % 10));//随机数字}randomCode += code.ToString();}return randomCode;}/// <summary>/// 发送邮件验证码/// </summary>/// <param name="MyEmailAddress">发件人邮箱地址</param>/// <param name="RecEmailAddress">收件人邮箱地址</param>/// <param name="Subject">邮件主题</param>/// <param name="MailContent">邮件内容</param>/// <param name="AuthorizationCode">邮箱授权码</param>/// <returns></returns>public static bool SendMailMessage(string MyEmailAddress, string RecEmailAddress, string Subject, string Body, string AuthorizationCode){MailMessage mail = new MailMessage();mail.From = new MailAddress(MyEmailAddress);//发件人邮箱地址mail.To.Add(new MailAddress(RecEmailAddress));//收件人邮箱地址mail.Subject = Subject;//邮件标题mail.Body = Body; //邮件内容 mail.Priority = MailPriority.High;//优先级SmtpClient client = new SmtpClient();//qq邮箱:；126邮箱: client.Host = "";client.Port = 587;//SMTP端口465或587client.EnableSsl = true;//使用安全加密SSL连接 client.DeliveryMethod = work;client.Credentials = new NetworkCredential(MyEmailAddress, AuthorizationCode);//验证发件人身份(发件人邮箱，邮箱授权码); try{client.Send(mail);}catch (Exception ex){MessageBox.Show(ex.Message, "发送失败", MessageBoxButtons.OK, MessageBoxIcon.Error);return false;}return true;}/// <summary>/// 验证QQ邮箱/// </summary>/// <param name="mail">邮箱</param>/// <returns></returns>public static bool CheckMail(string mail){string str = @"^[1-9][0-9]{4,}@$";Regex mReg = new Regex(str);if (mReg.IsMatch(mail)){return true;}return false;}#endregion}}
四、在From1中调用类中的函数，实现功能
using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;//需要引用的命名空间using .Mail;using ;namespace MailVeriCode{public partial class Form1 : Form{public Form1(){InitializeComponent();}/// <summary>/// 发送邮箱验证码/// </summary> int seconds1 = 60;//倒计时60sint seconds2 = 60 * 5;//验证码有效时间5分钟string strMailVeriCode; private void btnMailVeriCode_Click(object sender, EventArgs e){string recEMailAddress = txtMail.Text.Trim();//收件人邮箱 strMailVeriCode = MailVeriCodeClass.CreateRandomMailCode(6);string strBody = "验证码：" + strMailVeriCode + "，5分钟内有效,请勿泄漏于他人。如非本人操作，请忽略。系统邮件请勿回复。";//邮件内容 string strSubject = "【代码科技】注册验证";//邮件标题string strMyEmailAddress = "XXXXXXX";//发件人邮箱string strAuthorizationCode = "XXXXXX";//邮箱授权码if (string.IsNullOrEmpty(recEMailAddress))//判断是否输入了邮箱{MessageBox.Show("请输入邮箱！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);txtMail.Focus();}else if (MailVeriCodeClass.CheckMail(recEMailAddress) == false)//判断邮箱格式是否正确{MessageBox.Show("您输入的QQ邮箱有误，请重新输入！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);txtMail.Focus();return;}else//发送验证码{//发送if (MailVeriCodeClass.SendMailMessage(strMyEmailAddress, recEMailAddress, strSubject, strBody, strAuthorizationCode) == true){btnMailVeriCode.Enabled = false;//计时器初始化 timer1.Interval = 1000;timer1.Start();timer2.Interval = 1000;timer2.Start();}else{txtMail.Focus();}}}/// <summary>/// 倒计时—邮箱验证码1分钟只能点击发送1次/// </summary> private void timer1_Tick(object sender, EventArgs e){if (seconds1 > 0){seconds1--;btnMailVeriCode.Text = "剩余" + seconds1.ToString() + "秒";}else{timer1.Stop();btnMailVeriCode.Text = "获取验证码";btnMailVeriCode.Enabled = true;}}/// <summary>/// 手机SMS验证码5分钟内有效；但是如果有新的验证码出现,旧验证码就会失效 /// </summary>private void timer2_Tick(object sender, EventArgs e){if (seconds2 == 0){timer2.Stop();//旧的验证码过期,生成一个新的验证码strMailVeriCode = MailVeriCodeClass.CreateRandomMailCode(6);}}/// <summary>/// 确认邮箱验证码/// </summary>private void btnConfirm_Click(object sender, EventArgs e){string mailVeriCode = txtMailVeriCode.Text.Trim();//邮箱验证码 if (string.IsNullOrEmpty(mailVeriCode) == true){MessageBox.Show("请输入验证码", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);txtMailVeriCode.Focus();}else if (mailVeriCode.ToLower() != strMailVeriCode.ToLower())//判断邮箱验证码是否输入正确；不区分字母大小写{MessageBox.Show("您输入的验证码有误！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);txtMailVeriCode.Focus();return;}else{MessageBox.Show("验证成功!");}}}}
参考文章： /weixin_42449444/article/details/90722070
