C#窗体程序连接SQL Server数据库实现账号登录、账号注册、修改密码、账号注销和实名认证(不定时更新)

这是本人用C#窗体做的一个登录程序,如标题所示,它包含了账号登录、注册账号、修改密码、注销账号和实名认证五个功能。对于有一定基础知识的小伙伴来说,应该不算太难,里面有注释说明,可能咋一看感觉代码运行的逻辑有点乱,不过没关系,相信对你会有所帮助。以下是详细的操作过程。

一、配置数据库文件和程序代码

1、由于这个登录程序连接了SQL Server数据库,所以需要配置一下相关数据,创建一个“账号登录”数据库,新建一个“登录注册表”和“实名信息表”,并记住这个服务器名称,等下会用到,如下图所示。

在这里插入图片描


登录注册表设置两个列名:username(账号)和password(密码)以及对应的数据类型(可自定义)。

在这里插入图片描述


实名信息表要设置3个列名,分别是:username(账号)、Name(姓名)、IDcard(身份证号)。设置username列名是为了关联这两张表。

实名信息表列表格式

SQL查询显示结果,password和userpwd(即username+password)均显示为密文;如果账号未实名,则Name和IDcard两栏没有数据。

在这里插入图片描述

2、然后打开VS2019,新建一个窗体程序(我新建的窗体是CT12),在里面设置一下App.config的SQL数据库连接信息,如下图所示。

在这里插入图片描述

App.config里面的代码格式:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
	</startup>
	<connectionStrings>
		<add name="sqlserver" connectionString="server=SQLEXPRESS;database=账号登录;integrated security = true;"/>
		//这是以windows身份验证登录连接,SQLEXPRESS是服务器名称,“账号登录”是新建的数据库名称.
	</connectionStrings>
</configuration>

二、配置C#窗体控件布局和源代码

该登录程序包含了6个窗体,分别为:Form1——登录界面、Form2——注册界面、Form3——主界面、Form4——修改密码界面、Form5——账号注销界面、Form6——实名认证界面。

注意:由于连接了SQL数据库,这5个窗体之间数据相互传递、相互关联,如果只截取一段窗体代码运行,则会直接报错。

1、窗体Form1:账号登录界面

label1——账号,label2——密码,
textBox1——对应账号输入,textBox2——对应密码输入,
button1——登录,button2——重置,
button3——退出,button4——注册。
checkBox1——是否显示密码

窗体Form1的控件布局:

Form1窗体控件布局

窗体Form1源代码

using System;
using System.Configuration;
using System.Data.SqlClient;
using System.Windows.Forms;
using System.Drawing;
using System.ComponentModel;
using System.Security.Cryptography;
using System.Text;
using System.Diagnostics;

namespace CT12
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
            this.Text = "账号登录";
            ScreenSize();
            textBox2.PasswordChar = '*';//密码显示为"*"
        }

        public void ScreenSize()    //设置窗体样式和居中显示
        {
            int x = Screen.GetBounds(this).Width;
            int y = Screen.GetBounds(this).Height;
            this.MinimumSize = new Size(x / 2, y / 2);
            this.MaximumSize = new Size(x / 2, y / 2);
            this.CenterToParent();
            this.CenterToScreen();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            ScreenSize();   //调用函数
            this.ActiveControl = textBox1;  //焦点在控件textBox1上面
        }

        private void Button4_Click(object sender, EventArgs e) //跳转注册界面
        {
            this.Hide();
            Form2 sd = new Form2();
            sd.Show();
        }

        private void Button3_Click(object sender, EventArgs e)  //退出程序
        {
            Process.GetCurrentProcess().Kill();
        }

        private void Button2_Click(object sender, EventArgs e)      //重置登录信息
        {
            textBox1.Text = "";
            textBox2.Text = "";
            this.ActiveControl = textBox1;
        }

        public string MD5Encrypt(string rawPass, string salt)      //MD5加盐加密
        {
            MD5 md5 = MD5.Create();
            byte[] bs = Encoding.UTF8.GetBytes(rawPass + salt);
            byte[] ts = md5.ComputeHash(bs);
            StringBuilder std = new StringBuilder();
            foreach (byte i in ts)
            {
                std.Append(i.ToString("x2"));
            }
            return std.ToString();  //返回密文
        }

        readonly string Stu = ConfigurationManager.ConnectionStrings["sqlserver"].ConnectionString;     //创建数据库连接

        public static string username;  //设置Form1的一个参数,登录成功后将显示在主界面Form3
        public static string password;

        private void Button1_Click(object sender, EventArgs e)  //登录代码
        {
            SqlConnection conn = new SqlConnection(Stu);    //创建数据库游标对象conn
            conn.Open(); //打开数据库
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "select * from 登录注册表 where username='" + textBox1.Text.Trim() + "'";
            SqlDataReader sdt = cmd.ExecuteReader();
            if (textBox1.Text == "")
            {
                MessageBox.Show("账号不得为空!", "提示");
                this.ActiveControl = textBox1;
            }
            else if (textBox2.Text == "")
            {
                MessageBox.Show("密码不得为空!", "提示");
                this.ActiveControl = textBox2;
            }
            else if (sdt.Read() == true)    //读取到记录
            {
                string result = sdt.GetString(sdt.GetOrdinal("password"));
                if (MD5Encrypt(textBox2.Text.Trim(), textBox1.Text.Trim()) == result)
                {
                    MessageBox.Show("登录成功!", "提示");
                    username = textBox1.Text.Trim();       //将textBox1的值赋给参数username
                    password = textBox2.Text.Trim();        //将textBox2的值赋给参数password
                    conn.Close();         //关闭数据库连接
                    this.Hide();         //隐藏当前窗口
                    Form3 sd = new Form3();
                    sd.Show();         //显示主界面Form3
                }
                else
                {
                    MessageBox.Show("账号密码错误!", "提示");
                    textBox2.Text = "";
                    this.ActiveControl = textBox2;
                }
            }
            else
            {
                DialogResult dr = MessageBox.Show("账号不存在,是否选择注册一个新账号?", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);
                if (dr == DialogResult.OK)
                {
                    this.Hide();
                    Form2 er = new Form2();
                    er.Show();
                    conn.Close();
                }
                else
                {
                    textBox1.Text = "";
                    textBox2.Text = "";
                    this.ActiveControl = textBox1;
                }
            }
            conn.Close();   //关闭游标对象连接
        }

        private void CheckBox1_CheckedChanged(object sender, EventArgs e)   //是否显示密码输入为“*”
        {
            if (checkBox1.Checked)
            {
                textBox2.PasswordChar = '\0';
            }
            else
            {
                textBox2.PasswordChar = '*';
            }
        }

        protected override void OnClosing(CancelEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }
    }
}



窗体Form1运行效果截图

账号登录成功


在这里插入图片描述


在这里插入图片描述


2、窗体Form2:账号注册界面

label1——新用户名,label2——用户密码,label3——确认密码
textBox1(对应新用户名),textBox2(对应用户密码),textBox3(对应确认密码)
button1——确认,button2——重置,button3——返回

窗体Form2的控件布局

在这里插入图片描述

窗体Form2源代码

using System;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Diagnostics;
using System.Drawing;
using System.Security.Cryptography;
using System.Text;
using System.Windows.Forms;

namespace CT12
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
            this.Text = "账号注册";
            ScreenSize();
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            ScreenSize();
            textBox2.PasswordChar = '*';    //textBox2——用户密码显示为"*"
            textBox3.PasswordChar = '*';    //textBox3——确认密码显示为"*"
            this.ActiveControl = textBox1;  //焦点在输入框textBox1上
        }

        public void ScreenSize()    //设置窗体大小尺寸和居中显示
        {
            int x = Screen.GetBounds(this).Width;       //获取屏幕宽度
            int y = Screen.GetBounds(this).Height;      //获取屏幕高度
            this.MinimumSize = new Size(x / 2, y / 2);      //设置窗口最小尺寸
            this.MaximumSize = new Size(x / 2, y / 2);      //设置窗口最大尺寸
            this.CenterToParent();
            this.CenterToScreen();
        }

        private void Button2_Click(object sender, EventArgs e)  //重置输入框信息
        {
            textBox1.Text = "";
            textBox2.Text = "";
            textBox3.Text = "";
            this.ActiveControl = textBox1;
        }

        private void Button3_Click(object sender, EventArgs e)  //返回登录界面Form1
        {
            this.Hide();
            Form1 sd = new Form1();
            sd.Show();
        }

        public string MD5Encrypt(string rawPass, string salt)   //MD5加盐加密操作
        {
            MD5 md5 = MD5.Create();
            byte[] bs = Encoding.UTF8.GetBytes(rawPass + salt);
            byte[] hs = md5.ComputeHash(bs);
            StringBuilder stb = new StringBuilder();
            foreach (byte b in hs)
            {
                stb.Append(b.ToString("x2"));
            }
            return stb.ToString();
        }

        readonly string Stu = ConfigurationManager.ConnectionStrings["sqlserver"].ConnectionString;

        private void Button1_Click(object sender, EventArgs e)
        {
            //创建数据库对象连接
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            string sql = "Select username from 登录注册表 where username='" + textBox1.Text.Trim() + "'";
            SqlCommand cmd = new SqlCommand(sql, conn);      //判断账号是否已存在
            cmd.CommandType = CommandType.Text;
            SqlDataReader sdt = cmd.ExecuteReader();
            if (textBox1.Text == "")
            {
                MessageBox.Show("注册账号不得为空!", "提示");
            }
            else if (textBox2.Text == "")
            {
                MessageBox.Show("注册账号密码不得为空!", "提示");
            }
            else if (textBox3.Text == "" || textBox2.Text != textBox3.Text)
            {
                MessageBox.Show("请重新确认密码", "提示");
                textBox2.Text = "";
                textBox3.Text = "";
            }
            /*else if(textBox1.Text.Length<8)
            {
                MessageBox.Show("请输入8位以上的新用户名!","提示");
                textBox1.Text = "";
            }
            else if (Regex.IsMatch(textBox2.Text.ToString(),@"^\w+_$") == false)
            {
                MessageBox.Show("请输入8~16位由字母、数字和下划线组成的密码!");
                textBox2.Text = "";
                textBox3.Text = "";
            }
            else if(textBox2.Text.Length<8||textBox2.Text.Length>16)
            {
                MessageBox.Show("请输入8~16位由字母、数字和下划线组成的密码!");
                textBox2.Text = "";
                textBox3.Text = "";
            }*/
            else
            {
                if (sdt.Read())
                {
                    MessageBox.Show("该账号已注册,请重新输入新账号!", "提示");
                    textBox1.Text = "";
                }
                else
                {
                    //插入的信息分别为账号,密文,账号+密文
                    Insert(textBox1.Text.Trim(), MD5Encrypt(textBox2.Text.Trim(), textBox1.Text.Trim()));
                    //调用函数Insert()保存注册信息到数据库
                    conn.Close();
                    this.Hide();
                    Form1 df = new Form1();
                    df.Show();
                }
            }
            conn.Close();
        }

        public void Insert(string txt1, string txt2)   //数据库插入注册成功后的账号信息
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            try
            {
                string InsertStr = string.Format("insert into 登录注册表 values('{0}','{1}')", txt1, txt2);
                SqlCommand comm = conn.CreateCommand();
                comm.CommandText = InsertStr;
                SqlCommand mycom = new SqlCommand(InsertStr, conn);
                mycom.ExecuteNonQuery();
                MessageBox.Show("账号注册成功!", "提示");
                conn.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                conn.Close();
            }
            conn.Close();
        }

        private void CheckBox1_CheckedChanged(object sender, EventArgs e)   //textBox2文本框输入显示为"*"
        {
            if (checkBox1.Checked)
                textBox2.PasswordChar = '\0';
            else
                textBox2.PasswordChar = '*';
        }

        private void CheckBox2_CheckedChanged(object sender, EventArgs e)   //textBox3文本框输入为"*"
        {
            if (checkBox2.Checked)
                textBox3.PasswordChar = '\0';
            else
                textBox3.PasswordChar = '*';
        }

        protected override void OnClosing(CancelEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }

        private void Form2_FormClosing(object sender, FormClosingEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }
    }
}



窗体Form2运行效果截图

账号注册成功


账号已注册


3、窗体Form3:主界面

checkBox1——当前账号,Label1——显示账号
textBox1——显示姓名,textBox2——显示身份证号
Button1——修改密码,Button2——注销账号,Button5——实名认证,
Button3——返回,Button4——退出

窗体Form3的控件布局

在这里插入图片描述

窗体Form3的源代码


using System;
using System.ComponentModel;
using System.Configuration;
using System.Data.SqlClient;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

namespace CT12
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
            this.Text = "账号信息";
            ScreenSize();
        }

        public void ScreenSize()
        {
            int x = Screen.GetBounds(this).Width;
            int y = Screen.GetBounds(this).Height;
            this.MinimumSize = new Size(x / 2, y / 2);
            this.CenterToParent();
            this.CenterToScreen();
        }

        private void Form3_Load(object sender, EventArgs e)
        {
            ScreenSize();
            ShowUser(Form1.username);
            this.HideDcard(Form1.username);
            ShowName();
        }

        public void ShowName()
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "select Name,IDcard from 实名信息表 where username='" + Form1.username + "'";
            SqlDataReader reader = cmd.ExecuteReader();
            if (reader.Read() == true)
            {
                this.textBox2.Text = reader.GetString(reader.GetOrdinal("Name"));
                //实名认证成功后,主界面Form3默认显示姓名
            }
            else
            {
                this.textBox2.Text = "";
            }
            conn.Close();
        }

        private void Button1_Click(object sender, EventArgs e)  //跳转窗体Form4:修改密码界面
        {
            this.Hide();
            Form4 df = new Form4();
            df.Show();
        }

        private void Button2_Click(object sender, EventArgs e)  //跳转窗体Form5:注销账号界面
        {
            this.Hide();
            Form5 sd = new Form5();
            sd.Show();
        }

        private void Button4_Click(object sender, EventArgs e)  //强制退出所有窗口程序和线程
        {
            Process.GetCurrentProcess().Kill();
        }

        private void Button3_Click(object sender, EventArgs e)  //返回窗体Form1:登录界面
        {
            DialogResult dr = MessageBox.Show("是否返回登录界面?", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
            if (dr == DialogResult.Yes)
            {
                this.Hide();
                Form1 sdd = new Form1();
                sdd.Show();
            }
        }

        private void Button5_Click_1(object sender, EventArgs e)
        {
            this.Hide();
            Form6 asd = new Form6();
            asd.Show();
        }


        public void ShowUser(string text)
        {
            char StarChar = '*';
            string value = text;
            int startlen = 1, endlen = 1;
            int lenth = value.Length - startlen - endlen;
            string str1 = value.Substring(startlen, lenth);
            string str2 = string.Empty;
            for (int i = 0; i < str1.Length; i++)
            {
                str2 += StarChar;
            }
            label1.Text = value.Replace(str1, str2);
        }

        readonly string Stu = ConfigurationManager.ConnectionStrings["sqlserver"].ConnectionString;

        private void CheckBox1_CheckedChanged(object sender, EventArgs e)   //是否显示账号
        {
            if (checkBox1.Checked)
            {
                label1.Text = Form1.username;
            }
            else
            {
                ShowUser(Form1.username);   //调用方法显示*号
            }
        }

        private void CheckBox2_CheckedChanged(object sender, EventArgs e)       //是否显示身份证号
        {
            SqlConnection con = new SqlConnection(Stu);
            con.Open();
            SqlCommand cmd = con.CreateCommand();
            cmd.CommandText = "select Name,IDcard from 实名信息表 where username='" + Form1.username + "'";
            SqlDataReader reader = cmd.ExecuteReader();
            if (reader.Read() == true)
            {
                if (checkBox2.Checked)
                {
                    textBox2.Text = reader.GetString(reader.GetOrdinal("Name"));
                    ShowIDcard(Form1.username);  //调用方法函数,显示完整身份证号
                }
                else
                {
                    HideDcard(Form1.username);  //显示加密后的身份证号
                }
            }
            con.Close();
        }

        public void ShowIDcard(string text)  //显示完整的实名信息
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "select Name,IDcard from 实名信息表 where username='" + text + "'";
            SqlDataReader reader = cmd.ExecuteReader();
            if (reader.Read() == true)
            {
                textBox3.Text = reader.GetString(reader.GetOrdinal("IDcard"));
            }
            conn.Close();
        }

        public void HideDcard(string text)  //用'*'号加密身份证号
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "select Name,IDcard from 实名信息表 where username='" + text + "'";
            SqlDataReader reader = cmd.ExecuteReader();
            if (reader.Read() == true)
            {
                string sdd = "*";
                string IDcard = reader.GetString(reader.GetOrdinal("IDcard"));
                for (int i = 0; i < IDcard.Length - 3; i++)
                {
                    sdd += "*";
                }
                textBox3.Text = IDcard.Substring(0, 1) + sdd + IDcard.Substring(IDcard.Length - 2, 2);
            }
            else
            {
                textBox3.Text = "";
            }
            conn.Close();
        }

        private void Form3_FormClosing(object sender, FormClosingEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }

        protected override void OnClosing(CancelEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }
    }
}





窗体Form3界面效果截图

Form3


4、窗体Form4:修改密码界面

label2——旧密码,label3——新密码
textBox2(对应旧密码),textBox3(对应新密码)
Button1——确认,Button2——重置,Button3——取消

窗体Form4的控件布局

Form4控件布局

窗体Form4的源代码


using System;
using System.Configuration;
using System.Data.SqlClient;
using System.Diagnostics;
using System.Drawing;
using System.Security.Cryptography;
using System.Text;
using System.Windows.Forms;

namespace CT12
{
    public partial class Form4 : Form
    {
        public Form4()
        {
            InitializeComponent();
            this.Text = "修改密码";
            ScreenSize();
        }

        public void ScreenSize()
        {
            int x = Screen.GetBounds(this).Width;
            int y = Screen.GetBounds(this).Height;
            this.MinimumSize = new Size(x / 2, y / 2);
            this.CenterToParent();
            this.CenterToScreen();
        }

        private void Form4_Load(object sender, EventArgs e)
        {
            ScreenSize();
            textBox2.PasswordChar = '*';
            textBox3.PasswordChar = '*';
            this.ActiveControl = textBox2;
        }

        private void Button3_Click(object sender, EventArgs e)  //返回窗体Form3:主界面
        {
            this.Hide();
            Form3 df = new Form3();
            df.Show();
        }

        private void Button2_Click(object sender, EventArgs e)  //重置textBox文本框的输入信息
        {
            this.ActiveControl = textBox2;
            textBox2.Text = "";
            textBox3.Text = "";
        }

        public string MD5Encrypt(string rawPass, string salt)      //MD5加盐加密
        {
            MD5 md5 = MD5.Create();
            byte[] bs = Encoding.UTF8.GetBytes(rawPass + salt);
            byte[] ts = md5.ComputeHash(bs);
            StringBuilder std = new StringBuilder();
            foreach (byte i in ts)
            {
                std.Append(i.ToString("x2"));
            }
            return std.ToString();  //返回密文
        }

        readonly string Stu = ConfigurationManager.ConnectionStrings["sqlserver"].ConnectionString;  //创建数据库连接

        private void Button1_Click(object sender, EventArgs e)
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            string sql = "Select * from 登录注册表 where username='" + Form1.username.Trim() + "'";
            SqlCommand cmd = new SqlCommand(sql, conn);     //调用登录窗体Form1参数username,判断当前账号密码是否正确
            SqlDataReader reader = cmd.ExecuteReader();
            if (textBox2.Text == "")
            {
                MessageBox.Show("账号密码不得为空!", "提示");
                this.ActiveControl = textBox2;
            }
            else if (textBox3.Text == "")
            {
                MessageBox.Show("请输入新密码!", "提示");
                this.ActiveControl = textBox3;
            } 
            else if (reader.Read())
            {
                string result = reader.GetString(reader.GetOrdinal("password"));
                if (MD5Encrypt(textBox2.Text.Trim(), Form1.username) == result)
                {
                    Change(Form1.username, MD5Encrypt(textBox3.Text, Form1.username));
                    //调用Change()函数方法保存修改后的账号信息到数据库
                    this.Hide();
                    Form1 sd = new Form1();
                    sd.Show();
                    conn.Close();
                }
                else
                {
                    MessageBox.Show("账号密码错误!", "提示");
                    textBox2.Text = "";
                    textBox3.Text = "";
                    this.ActiveControl = textBox2;
                }
            }
            else
            {
                MessageBox.Show("账号密码错误!", "提示");
                textBox2.Text = "";
                textBox3.Text = "";
                this.ActiveControl = textBox2;
            }
            conn.Close();
        }

        public void Change(string txt1, string txt2)     //数据库保存修改后的账号信息
        {//txt1为当前账号,txt2为加密后的密文,txt3为当前账号+密文
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            try
            {
                string InsertStr = string.Format("update 登录注册表 set password='{0}' WHERE username='{1}';", txt2.ToString(), txt1.ToString());
                SqlCommand comm = conn.CreateCommand();
                SqlCommand mycom = new SqlCommand(InsertStr, conn);
                mycom.ExecuteNonQuery();
                conn.Close();
                MessageBox.Show("账号密码修改成功!", "提示");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                textBox2.Text = "";
                textBox3.Text = "";
            }

        }

        private void CheckBox1_CheckedChanged(object sender, EventArgs e)   //textBox2文本框输入是否显示为"*"
        {
            if (checkBox1.Checked)
            {
                textBox2.PasswordChar = '\0';
            }
            else
            {
                textBox2.PasswordChar = '*';
            }
        }

        private void CheckBox2_CheckedChanged(object sender, EventArgs e)   // //textBox3文本框输入是否显示为"*"
        {
            if (checkBox1.Checked)
            {
                textBox3.PasswordChar = '\0';
            }
            else
            {
                textBox3.PasswordChar = '*';
            }
        }

        private void Form4_FormClosing(object sender, FormClosingEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }
    }
}




窗体Form4运行效果截图

在这里插入图片描述


在这里插入图片描述


5、窗体Form5:账号注销界面

label2——账号密码,textBox2——对应当前账号密码,
button1——注销,button2——重置,button3——取消

窗体Form5的控件布局

控件布局

窗体Form5的源代码


using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Diagnostics;
using System.Drawing;
using System.Security.Cryptography;
using System.Text;
using System.Windows.Forms;

namespace CT12
{
    public partial class Form5 : Form
    {
        public Form5()
        {
            InitializeComponent();
            this.Text = "账号注销";
            ScreenSize();
        }

        public void ScreenSize()
        {
            int x = Screen.GetBounds(this).Width;
            int y = Screen.GetBounds(this).Height;
            this.MinimumSize = new Size(x / 2, y / 2);
            this.CenterToParent();
            this.CenterToScreen();
        }

        private void Form5_Load(object sender, EventArgs e)
        {
            ScreenSize();
            this.ActiveControl = textBox2;
        }

        private void Button3_Click(object sender, EventArgs e)  //返回窗体Form3:主界面
        {
            this.Hide();
            Form3 sd = new Form3();
            sd.Show();
        }

        private void Button2_Click(object sender, EventArgs e)  //重置textBox文本框的信息
        {
            textBox2.Text = "";
            this.ActiveControl = textBox2;
        }

        public string MD5Encrypt(string rawPass, string salt)      //MD5加盐加密
        {
            MD5 md5 = MD5.Create();
            byte[] bs = Encoding.UTF8.GetBytes(rawPass + salt);
            byte[] ts = md5.ComputeHash(bs);
            StringBuilder std = new StringBuilder();
            foreach (byte i in ts)
            {
                std.Append(i.ToString("x2"));
            }
            return std.ToString();  //返回密文
        }

        readonly string Stu = ConfigurationManager.ConnectionStrings["sqlserver"].ConnectionString;

        private void Button1_Click(object sender, EventArgs e)  //账号注销功能
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            string sql = "Select * from 登录注册表 where username='" + Form1.username + "'";
            SqlCommand cmd = new SqlCommand(sql, conn);     //判断当前账号密码是否正确
            cmd.CommandType = CommandType.Text;
            SqlDataReader reader = cmd.ExecuteReader();
            if (textBox2.Text == "")
            {
                MessageBox.Show("账号密码不得为空!", "提示");
            }
            else if (reader.Read() == true)
            {
                string result = reader.GetString(reader.GetOrdinal("password"));
                if (MD5Encrypt(textBox2.Text.Trim(), Form1.username) == result)
                {
                    MessageBox.Show("账号注销成功!", "提示");
                    Delete();   //调用方法,删除注销后的账号信息
                    conn.Close();   //关闭数据库对象连接
                    this.Hide();
                    Form1 sd = new Form1();
                    sd.Show();

                }
                else
                {
                    MessageBox.Show("账号密码错误!", "提示");
                    textBox2.Text = "";
                    this.ActiveControl = textBox2;
                }
            }
            else
            {
                MessageBox.Show("账号密码错误!", "提示");
                textBox2.Text = "";
                this.ActiveControl = textBox2;
            }
            conn.Close();
        }

        public void Delete() //数据库删除注销后的账号信息
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            try
            {
                string sql2 = "delete from 登录注册表 where username='" + Form1.username + "'";
                SqlCommand cmd1 = new SqlCommand(sql2, conn);
                cmd1.ExecuteNonQuery();
                conn.Close();
                Delete2();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        public void Delete2()      //删除注销账号的实名信息
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            try
            {
                string sql1 = "delete from 实名信息表 where username='" + Form1.username + "'";
                SqlCommand cmd = new SqlCommand(sql1, conn);
                cmd.ExecuteNonQuery();
                conn.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }


        private void Form5_FormClosing(object sender, FormClosingEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }
    }
}



6、窗体Form6:实名认证界面

label1——姓名,label2——身份证号
textBox1——对应姓名,textBox2——对应身份证号
button1——绑定,button2——重置,button3——返回

窗体Form6的控件布局

Form6控件布局

窗体Form6源代码

using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Diagnostics;
using System.Drawing;
using System.Security.Cryptography;
using System.Text;
using System.Windows.Forms;

namespace CT12
{
    public partial class Form6 : Form
    {
        public Form6()
        {
            InitializeComponent();
            this.Text = "实名认证";
            ScreenSize();
        }

        private void Form6_Load(object sender, EventArgs e)
        {
            ScreenSize();
        }

        public void ScreenSize()
        {
            int x = Screen.GetBounds(this).Width;
            int y = Screen.GetBounds(this).Height;
            this.MinimumSize = new Size(x / 2, y / 2);
            this.CenterToParent();
            this.CenterToScreen();
        }
        private void Button3_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form3 sd = new Form3();
            sd.Show();
        }

        private void Button2_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            textBox2.Text = "";
        }

        public string MD5Encrypt(string rawPass, string salt)      //MD5加盐加密
        {
            MD5 md5 = MD5.Create();
            byte[] bs = Encoding.UTF8.GetBytes(rawPass + salt);
            byte[] ts = md5.ComputeHash(bs);
            StringBuilder std = new StringBuilder();
            foreach (byte i in ts)
            {
                std.Append(i.ToString("x2"));
            }
            return std.ToString();  //返回密文
        }

        readonly string Stu = ConfigurationManager.ConnectionStrings["sqlserver"].ConnectionString;

        public static string name;  //创建参数name,实名认证成功后显示在主界面Form3
        public static string IDcard;    //创建参数IDcard,实名认证成功后显示在主界面Form3

        private void Button1_Click(object sender, EventArgs e)      //绑定操作
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            string sql1 = "Select IDcard from 实名信息表 where IDcard='" + textBox2.Text + "'";
            SqlCommand cmd = new SqlCommand(sql1, conn);
            cmd.CommandType = CommandType.Text;
            SqlDataReader stt;
            stt = cmd.ExecuteReader();
            if (textBox1.Text == "")
            {
                MessageBox.Show("提示", "真实姓名不得为空!");
                this.ActiveControl = textBox1;
            }
            else if (textBox2.Text == "")
            {
                MessageBox.Show("身份证号码不得为空!", "提示");
                this.ActiveControl = textBox2;
            }
            /*else if (Regex.IsMatch(textBox1.Text.ToString(),@"[\u4E00-\u9FA5]+$") == false)
            {
                MessageBox.Show("请输入真实有效的姓名!","提示");
                textBox1.Text = "";
                this.ActiveControl = textBox1;
            }
            else if (Regex.IsMatch(textBox2.Text.ToString(),@"^\d+$") == false && textBox2.Text.Length != 18)
            {
                MessageBox.Show("请输入真实有效的身份证号码!","提示");
                textBox2.Text = "";
                this.ActiveControl = textBox2;
            }*/
            else
            {
                if (stt.Read() == true)     //读取到一条记录就返回
                {
                    MessageBox.Show("该身份证号已绑定其他账号,请重新绑定!", "提示");
                    textBox1.Text = "";
                    textBox2.Text = "";
                }
                else
                {
                    Verfy();    //调用函数判断当前账号是否已经实名认证
                    conn.Close();
                }
            }
            conn.Close();
        }

        public void Verfy()     //判断账号是否已经实名认证
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            string sql2 = "Select Name,IDcard from 实名信息表 where username='" + Form1.username + "'";
            SqlCommand cmd1 = new SqlCommand(sql2, conn);
            cmd1.CommandType = CommandType.Text;
            SqlDataReader sdt;
            sdt = cmd1.ExecuteReader();
            if (sdt.Read() == true)
            {
                MessageBox.Show("该账号已实名认证!", "提示");
                textBox1.Text = "";
                textBox2.Text = "";
            }
            else
            {
                Insert(Form1.username, textBox1.Text, textBox2.Text);   //调用方法Insert()
                name = textBox1.Text;
                IDcard = textBox2.Text;
                conn.Close();
                this.Hide();
                Form3 sw = new Form3();
                sw.Show();
            }
            conn.Close();
        }

        public void Insert(string txt1, string txt2, string txt3)       //保存实名后的信息到数据库
        {
            SqlConnection conn = new SqlConnection(Stu);
            conn.Open();
            try
            {
                MessageBox.Show("实名认证成功!", "提示");
                string InsertStr = string.Format("insert into 实名信息表 values('{0}','{1}','{2}')", txt2, txt3);
                SqlCommand mycom = new SqlCommand(InsertStr, conn);
                mycom.ExecuteNonQuery();
                conn.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void Form6_FormClosing(object sender, FormClosingEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }
    }
}



Form6运行效果截图

在这里插入图片描述


在这里插入图片描述


在这里插入图片描述


总结

以上就是今天要跟大家分享的内容,可能代码有点多,代码逻辑看起来比较乱,花了几个星期时间写的,期间修修改改了很多次,尚且还有不足之处,仅供学习和参考;感兴趣的小伙伴可以来看看,希望对你有所帮助,也欢迎大家的批评指正。

本人声明:未经本人许可,禁止转载!!!如果要引用部分代码,请标明出处!!

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