九、忘记密码功能的实现

发布时间：2024-04-05 15:01

一、页面设计

login页面，和第二篇博文(用户登录和注册)页面基本一样，只不过多了一个按钮
其中忘记密码？点我找回 为button3
\"九、忘记密码功能的实现_第1张图片\"
retrieve_password页面
\"九、忘记密码功能的实现_第2张图片\"

change_password页面
\"九、忘记密码功能的实现_第3张图片\"
页面如下：
\"九、忘记密码功能的实现_第4张图片\"

二、数据库

因为是忘记密码，也就是修改密码而已，数据表仍为yy_user不变
id设置为主键自增
\"九、忘记密码功能的实现_第5张图片\"
随便添加些数据
\"九、忘记密码功能的实现_第6张图片\"
\"九、忘记密码功能的实现_第7张图片\"

三、代码如下

login页面代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;

namespace fiber_yy
{
    
    public partial class login : Form
    {
        public string name = \"\";

        public static string str_conn = \"server=CY-20190824RMES;Initial Catalog=fiber_yy;User ID=sa;pwd=beyond\";
        SqlConnection conn = new SqlConnection(str_conn);
        public string identification = null;

        public login()
        {
            InitializeComponent();
            
        }


        private void button1_Click(object sender, EventArgs e)//登录
        {
            conn.Open();
            string sex = \"\";
            string phone = \"\";
            string day = DateTime.Now.ToLocalTime().ToString();

            //string time = DateTime.Now.ToLongTimeString().ToString();

            string username = textBox1.Text;
            string password = textBox2.Text;
            string identify = textBox3.Text;

            if (username.Equals(\"\") || password.Equals(\"\") || identify.Equals(\"\"))
            {
                MessageBox.Show(\"提示：请输入用户名、密码、验证码！\", \"警告\");
            }

            else
            {
                string sqlSel = \"select count(*) from yy_user where username = \'\" + username + \"\' and password = \'\" + password + \"\'\";
                SqlCommand cmd = new SqlCommand(sqlSel, conn);

                if (Convert.ToInt32(cmd.ExecuteScalar()) > 0 )//账号密码正确
                {
                    string sql = \"select username,sex,phone from yy_user where username = \'\" + username + \"\'\";
                    SqlCommand com = new SqlCommand(sql, conn);
                    SqlDataReader read = com.ExecuteReader();
                    while (read.Read())//获取yy_user表中的username,sex,phone
                    {
                        //int number = Convert.ToInt32(read[\"username\"]);//查询列名1的数据,方法为: read(变量名)[\"列名\"]; 该方法返回的是object类型
                        name = read[\"username\"].ToString();
                        //MessageBox.Show(name);
                        sex = read[\"sex\"].ToString();
                        //MessageBox.Show(sex);
                        phone = read[\"phone\"].ToString();
                        //MessageBox.Show(phone);
                    }
                    read.Close();


                    if (identify==identification)//判断验证码是否输入正确
                    {
                        string INSERT_sql = string.Format(\"INSERT INTO yy_user_record VALUES (\'{0}\',\'{1}\',\'{2}\',\'{3}\')\", name,sex,phone, DateTime.Now.ToLocalTime());
                        SqlCommand INSERT_cmd = new SqlCommand(INSERT_sql, conn);
                        int count = INSERT_cmd.ExecuteNonQuery();
                        if (count > 0)
                        {
                            MessageBox.Show(name);
                            MessageBox.Show(\"记录用户登录！\");
                            new main_page().Show();
                            this.Hide();
                        }
                        else
                        {
                            MessageBox.Show(\"记录用户失败\");
                        }

                    }
                    else 
                    {
                        MessageBox.Show(\"验证码输入错误\");
                    }
                                        
                }
                else
                {
                    MessageBox.Show(\"请检查账号密码\");
                }
            }

        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {
            Random r = new Random();
            string str = null;
            for (int i = 0; i < 5; i++)
            {
                int n = r.Next(0, 10);
                str += n;//包括字符串在内
            }
            identification = str;
            Bitmap b = new Bitmap(100, 15);
            Graphics g = Graphics.FromImage(b);

            for (int i = 0; i < 5; i++)
            {
                String[] fonts = { \"宋体\", \"黑体\", \"隶书\", \"仿宋\", \"微软雅黑\" };//字体数组
                Color[] colors = { Color.Red, Color.Black, Color.Blue,Color.YellowGreen ,Color.Green };//颜色数组
                Font f = new Font(fonts[r.Next(0, 5)], 25, FontStyle.Bold);
                SolidBrush s = new SolidBrush(colors[r.Next(0, 5)]);//定义一个单独的画笔，使每个字符的颜色随机
                Point p = new Point(i * 20, 0);//每个字符间隔20
                g.DrawString(str[i].ToString(), Font, s, p);
            }

            for (int a = 0; a < 5; a++)
            {
                Point p1 = new Point(r.Next(0, b.Width), r.Next(0, b.Height));
                Point p2 = new Point(r.Next(0, b.Width), r.Next(0, b.Height));//线的两点不能超过图片的长和宽
                Pen pen = new Pen(Brushes.Cyan);//青色线段
                g.DrawLine(pen, p1, p2);
            }

            pictureBox1.Image = b;

        }

        private void button2_Click(object sender, EventArgs e)
        {
            
            new Form1().Show();
            this.Hide();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            new retrieve_password().Show();
            this.Hide();
        }
    }
}

retrieve_password页面代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;

namespace fiber_yy
{
    public partial class retrieve_password : Form
    {
        public string name = \"\";
        public static string str_conn = \"server=CY-20190824RMES;Initial Catalog=fiber_yy;User ID=sa;pwd=beyond\";
        SqlConnection conn = new SqlConnection(str_conn);
        public string identification = null;
        public string phone = \"\";
        public string phone_db = \"\";
        public string username = \"\";
        public string username_db = \"\";
        public string identify = \"\";

        public retrieve_password()
        {
            InitializeComponent();
        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {
            Random r = new Random();
            string str = null;
            for (int i = 0; i < 5; i++)
            {
                int n = r.Next(0, 10);
                str += n;//包括字符串在内
            }
            identification = str;
            Bitmap b = new Bitmap(100, 15);
            Graphics g = Graphics.FromImage(b);

            for (int i = 0; i < 5; i++)
            {
                String[] fonts = { \"宋体\", \"黑体\", \"隶书\", \"仿宋\", \"微软雅黑\" };//字体数组
                Color[] colors = { Color.Red, Color.Black, Color.Blue, Color.YellowGreen, Color.Green };//颜色数组
                Font f = new Font(fonts[r.Next(0, 5)], 25, FontStyle.Bold);
                SolidBrush s = new SolidBrush(colors[r.Next(0, 5)]);//定义一个单独的画笔，使每个字符的颜色随机
                Point p = new Point(i * 20, 0);//每个字符间隔20
                g.DrawString(str[i].ToString(), Font, s, p);
            }

            for (int a = 0; a < 5; a++)
            {
                Point p1 = new Point(r.Next(0, b.Width), r.Next(0, b.Height));
                Point p2 = new Point(r.Next(0, b.Width), r.Next(0, b.Height));//线的两点不能超过图片的长和宽
                Pen pen = new Pen(Brushes.Cyan);//青色线段
                g.DrawLine(pen, p1, p2);
            }

            pictureBox1.Image = b;

            
        }

        private void button1_Click(object sender, EventArgs e)
        {
            username = textBox1.Text;
            phone = textBox2.Text;
            identify = textBox3.Text;
            //MessageBox.Show(identify);
            //MessageBox.Show(identification);
            
            if (identify == identification)//判断验证码是否输入正确
            {
                conn.Open();
                string sql = \"select username,phone from yy_user where username = \'\" + username + \"\'\";
                SqlCommand com = new SqlCommand(sql, conn);
                SqlDataReader read = com.ExecuteReader();
                while (read.Read())//获取yy_user表中的username,sex,phone
                {
                    //int number = Convert.ToInt32(read[\"username\"]);//查询列名1的数据,方法为: read(变量名)[\"列名\"]; 该方法返回的是object类型
                    username_db = read[\"username\"].ToString();
                    //MessageBox.Show(name);
                    //sex = read[\"sex\"].ToString();
                    //MessageBox.Show(sex);
                    phone_db = read[\"phone\"].ToString();
                    //MessageBox.Show(phone);
                }
                read.Close();
                MessageBox.Show(phone_db);
                if(phone_db==phone)
                {
                    //conn.Close();
                    MessageBox.Show(\"校验通过\");
                    new change_password(username).Show();
                    this.Hide();
                }
                else 
                {
                    MessageBox.Show(\"注册手机号不对\");
                }
            }
            else
            {
                MessageBox.Show(\"验证码输入错误\");
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            new login().Show();
            this.Hide();
        }
    }
    
}

change_password页面代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;
namespace fiber_yy
{
    public partial class change_password : Form
    {
        public string name = \"\";
        public static string str_conn = \"server=CY-20190824RMES;Initial Catalog=fiber_yy;User ID=sa;pwd=beyond\";
        SqlConnection conn = new SqlConnection(str_conn);
        //public string identification = null;
       
        public string password = \"\";
        public string password1 = \"\";

        public string username = \"\";
        //OleDbCommand cmd = new OleDbCommand();
        //cmd.Connection = conn;

        

        public change_password()
        {
            InitializeComponent();
        }


        public change_password(string yy)
        {
            InitializeComponent();
            username = yy;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show(username);

            password = textBox1.Text;
            password1 = textBox2.Text;

            if (password.Length <= 3 || password.Length >= 16)
            {
                label3.Text = \"密码长度应该在3~16字符之间\";
            }
            else if(password != password1)
            {
                label3.Text = \"两次输入密码不一致\";

                //MessageBox.Show(\"两次输入密码不一致\");
            }
            else if(password==password1)
            {
                conn.Open();
                string sql = \"update yy_user set password = \'\"+ password + \"\'   where username = \'\" + username + \"\'\";
                SqlCommand com = new SqlCommand(sql, conn);

                com.ExecuteNonQuery();//返回值为操作的条数
                MessageBox.Show(\"修改成功\");
                conn.Close();


                new login().Show();
                this.Hide();
            }
        }
    }
}

四、效果展示

程序运行
\"九、忘记密码功能的实现_第8张图片\"
登录
\"九、忘记密码功能的实现_第9张图片\"
忘记密码？点我找回
\"九、忘记密码功能的实现_第10张图片\"
\"九、忘记密码功能的实现_第11张图片\"
通过手机号来校验
\"九、忘记密码功能的实现_第12张图片\"
验证码输入错误
\"九、忘记密码功能的实现_第13张图片\"
调试时输出数据库中的注册手机号
\"九、忘记密码功能的实现_第14张图片\"
与输入框中的手机号对比
\"九、忘记密码功能的实现_第15张图片\"
校验成功，跳转到修改密码change_password页面
\"九、忘记密码功能的实现_第16张图片\"
两次密码必须一致
调试时，获取登录用户的账号
\"九、忘记密码功能的实现_第17张图片\"\"九、忘记密码功能的实现_第18张图片\"
\"九、忘记密码功能的实现_第19张图片\"

新密码必须在3-16字符之间

修改成功
\"九、忘记密码功能的实现_第20张图片\"

点击确定自动返回登录页面
\"九、忘记密码功能的实现_第21张图片\"
原始数据库
\"九、忘记密码功能的实现_第22张图片\"
右击yy_user表
选择前1000行
可看到密码已经修改成功
\"九、忘记密码功能的实现_第23张图片\"

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