文章目录
一、配置窗体控件布局和源代码1、窗体Form2：账号注册界面2、窗体Form1：账号登录界面3、窗体Form3：主界面4、窗体Form4：修改密码界面5、窗体Form5：账号注销界面 二、总结今天我们来用泛型List来实现窗体登录程序，模板和之前的差不多，但是具体代码实现过程有些不同。
一、配置窗体控件布局和源代码
该登录程序包含了5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。
注意：由于是通过泛型List来实现账号密码的存储，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。
这次和之前不同，我们先来设置一下注册界面Form2的控件布局和源代码，这是第一步，也是关键的一步。
1、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
窗体Form2源代码
using System;using System.Collections.Generic;using System.Diagnostics;using System.Drawing;using System.Windows.Forms;namespace CT22{public partial class Form2 : Form{public Form2(){InitializeComponent();this.Text = "注册界面";textBox2.PasswordChar = '*';//密码显示为"*"textBox3.PasswordChar = '*';ScreenSize();}private void Form2_Load(object sender, EventArgs e){ScreenSize();this.ActiveControl = textBox1;}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 Button2_Click(object sender, EventArgs e)//重置输入信息{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 static List<string> username = new List<string>();//创建一个公共的泛型List：username,存储输入的账号，作为参数在各窗体之间传递。public static List<string> password = new List<string>();//创建一个公共的泛型List：password,存储输入的密码，作为参数在各窗体之间传递。public static List<string> userpwd = new List<string>();//创建一个公共的泛型List：userpwd，存储输入的账号+密码，作为参数在各窗体之间传递，同时也是为了验证账号和密码是否匹配。private void Button1_Click(object sender, EventArgs e){if (textBox1.Text == ""){MessageBox.Show("注册账号不得为空!", "提示");this.ActiveControl = textBox1;}else if (textBox2.Text == ""){MessageBox.Show("账号密码不得为空!", "提示");this.ActiveControl = textBox2;}else if (textBox3.Text == "" || textBox2.Text != textBox3.Text){MessageBox.Show("请重新确认密码!", "提示");textBox3.Text = "";this.ActiveControl = textBox3;}/*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 (username.Contains(textBox1.Text)){MessageBox.Show("该账号已注册!", "提示");textBox1.Text = "";textBox2.Text = "";textBox3.Text = "";}else{MessageBox.Show("账号注册成功!", "提示");username.Add(textBox1.Text);//存储输入的账号password.Add(textBox2.Text);//存储输入的密码userpwd.Add(textBox1.Text + textBox2.Text);//存储输入的（账号+密码）this.Hide();//隐藏当前窗口，不能用close(),Form1 sd = new Form1();//跳转窗体Fomr1sd.Show();}}private void Form2_FormClosing(object sender, FormClosingEventArgs e){Process.GetCurrentProcess().Kill();//关闭程序，中断所有进程}private void Form2_FormClosed(object sender, FormClosedEventArgs e){Process.GetCurrentProcess().Kill();}private void CheckBox1_CheckedChanged(object sender, EventArgs e){if (checkBox1.Checked){textBox2.PasswordChar = '\0';}else{textBox2.PasswordChar = '*';}}private void CheckBox2_CheckedChanged(object sender, EventArgs e){if (checkBox1.Checked){textBox3.PasswordChar = '\0';}else{textBox3.PasswordChar = '*';}}}}
2、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：
窗体Form1源代码
using System;using System.Diagnostics;using System.Drawing;using System.Windows.Forms;namespace CT22{public partial class Form1 : Form{public Form1(){InitializeComponent();this.Text = "登录界面";textBox2.PasswordChar = '*';ScreenSize();}private void Form1_Load(object sender, EventArgs e){ScreenSize();this.ActiveControl = textBox1;//鼠标光标在控件textBxo1上面}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 Button2_Click(object sender, EventArgs e){textBox1.Text = "";textBox2.Text = "";}private void Button3_Click(object sender, EventArgs e){Process.GetCurrentProcess().Kill();//退出程序，关闭所有后台线程}private void Button4_Click(object sender, EventArgs e){this.Hide();Form2 sd = new Form2();sd.Show();}public static string username;//设置一个在其他窗体之间传递的参数username，public static string password;//设置一个在其他窗体之间传递的参数passwordprivate void Button1_Click(object sender, EventArgs e){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 (!Form2.username.Contains(textBox1.Text)){DialogResult st = 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 (st == DialogResult.OK){this.Hide();Form2 er = new Form2();er.Show();}else{textBox1.Text = "";textBox2.Text = "";this.ActiveControl = textBox1;}}else if (Form2.userpwd.Contains(textBox1.Text + textBox2.Text)){MessageBox.Show("账号登录成功!", "提示");username = textBox1.Text;//参数username接收输入的账号，password = textBox2.Text;//参数password接收输入的密码this.Hide();Form3 sd = new Form3();sd.Show();}else{MessageBox.Show("账号密码错误!", "提示");textBox2.Text = "";this.ActiveControl = textBox2;}}private void CheckBox1_CheckedChanged(object sender, EventArgs e){if (checkBox1.Checked){textBox2.PasswordChar = '\0';}else{textBox2.PasswordChar = '*';}}}}
3、窗体Form3：主界面
label1——当前账号，textBox1——显示当前账号， Button1——修改密码，Button2——注销账号， Button4——返回，Button3——退出
窗体Form3的控件布局
窗体Form3的源代码
using System;using System.Diagnostics;using System.Drawing;using System.Windows.Forms;namespace CT22{public partial class Form3 : Form{public Form3(){InitializeComponent();this.Text = "主界面";ScreenSize();}private void Form3_Load(object sender, EventArgs e){ScreenSize();this.textBox1.Text = Form1.username;//接收登录界面Form1的参数username.}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 Button4_Click(object sender, EventArgs e){DialogResult dr = MessageBox.Show("是否返回登录界面？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);if (dr == DialogResult.OK){this.Hide();Form1 er = new Form1();er.Show();}}private void Button1_Click(object sender, EventArgs e){this.Hide();Form4 sd = new Form4();//跳转修改密码界面Form4sd.Show();}private void Button2_Click(object sender, EventArgs e){this.Hide();Form5 sd = new Form5();//跳转账号注销界面Form5sd.Show();}private void Button3_Click(object sender, EventArgs e){Process.GetCurrentProcess().Kill();}private void Form3_FormClosed(object sender, FormClosedEventArgs e){Process.GetCurrentProcess().Kill();}private void Form3_FormClosing(object sender, FormClosingEventArgs e){Process.GetCurrentProcess().Kill();}}}
4、窗体Form4：修改密码界面
label1——旧密码，label2——新密码 textBox1(对应旧密码)，textBox2(对应新密码) Button1——确认，Button2——重置，Button3——取消
窗体Form4的控件布局
窗体Form4源代码
using System;using System.Diagnostics;using System.Drawing;using System.Windows.Forms;namespace CT22{public partial class Form4 : Form{public Form4(){InitializeComponent();this.Text = "修改密码";ScreenSize();}private void Form4_Load(object sender, EventArgs e){ScreenSize();this.ActiveControl = textBox1;}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 Button2_Click(object sender, EventArgs e){textBox1.Text = "";textBox2.Text = "";}private void Button3_Click(object sender, EventArgs e){this.Hide();Form3 sd = new Form3();sd.Show();}private void Button1_Click(object sender, EventArgs e){if (textBox1.Text == ""){MessageBox.Show("请输入账号密码!", "提示");this.ActiveControl = textBox1;}else if (textBox2.Text == ""){MessageBox.Show("请输入新密码!", "提示");}else if (Form2.userpwd.Contains(Form1.username + textBox1.Text)){MessageBox.Show("账号密码修改成功!请重新登录!");for (int i = 0; i < Form2.password.Count; i++)//删除旧密码{if (textBox1.Text == Form2.password[i])Form2.password.Remove(Form2.password[i]);}for (int j = 0; j < Form2.userpwd.Count; j++) //删除账号+旧密码{if (Form1.username + textBox1.Text == Form2.userpwd[j])Form2.userpwd.Remove(Form2.userpwd[j]);}Form2.userpwd.Add(Form1.username + textBox2.Text);this.Hide();Form1 sd = new Form1();sd.Show();}else{MessageBox.Show("账号密码错误!", "提示");textBox1.Text = "";textBox2.Text = "";this.ActiveControl = textBox1;}}private void Form4_FormClosed(object sender, FormClosedEventArgs e){Process.GetCurrentProcess().Kill();}private void Form4_FormClosing(object sender, FormClosingEventArgs e){Process.GetCurrentProcess().Kill();}}}
5、窗体Form5：账号注销界面
label1——账号密码，textBox1——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
窗体Form5源代码
using System;using System.Drawing;using System.Windows.Forms;namespace CT22{public partial class Form5 : Form{public Form5(){InitializeComponent();ScreenSize();this.Text = "注销界面";}private void Form5_Load(object sender, EventArgs e){ScreenSize();this.ActiveControl = textBox1;}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 Button2_Click(object sender, EventArgs e){textBox1.Text = "";this.ActiveControl = textBox1;}private void Button3_Click(object sender, EventArgs e){this.Hide();Form3 sd = new Form3();sd.Show();}private void Button1_Click(object sender, EventArgs e){if (textBox1.Text == ""){MessageBox.Show("请输入账号密码!", "提示");this.ActiveControl = textBox1;}else if (Form2.userpwd.Contains(Form1.username + textBox1.Text)){DialogResult st = MessageBox.Show("是否要注销账号?", "提示", MessageBoxButtons.OKCancel,MessageBoxIcon.Information);if (st == DialogResult.OK){MessageBox.Show("账号注销成功!", "提示");for (int i = 0; i < Form2.username.Count; i++){if (Form1.username.Equals(Form2.username[i]))Form2.username.Remove(Form2.username[i]);}for (int i = 0; i < Form2.password.Count; i++){if (textBox1.Text.Equals(Form2.password[i]))Form2.password.Remove(Form2.password[i]);}for (int i = 0; i < Form2.userpwd.Count; i++){if ((Form1.username + textBox1.Text).Equals(Form2.userpwd[i]))Form2.userpwd.Remove(Form2.userpwd[i]);}this.Hide();Form1 sd = new Form1();sd.Show();}else{textBox1.Text = "";this.ActiveControl = textBox1;}}}}}
二、总结
以上就是今天要跟大家分享的内容，之前我用C#窗体连接数据库来实现账号登录和注册（点击即可查看），但是这次的登录程序没有连接数据库，而是通过创建泛型List来存储账号密码，因为在之前的文章（点击即可查看）中我也提过，只要找到存储数据的途径，剩下的就好办了。
个人声明：以上内容未经本人允许禁止转载！！！如果要引用部分代码，请标明出处！！
