C# 管理系统(winform版)

登录界面

namespace 管理系统
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load_1(object sender, EventArgs e)
        {
            comboBox1.SelectedIndex = 0; // 设置角色第一个选项为索引0的字符
            comboBox1.DropDownStyle = ComboBoxStyle.DropDownList; // 设置不能输入
        }
        const string admTt = "111111", pwdTt = "admin";
        const string admSt = "222222", pwdSt = "admin";

        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string id = maskedTextBox1.Text;
            string pwd = textBox1.Text;
            if (id.Equals("") || pwd.Equals(" "))
            {
                MessageBox.Show("请输入必选项");
                return;
            }
            string selestyle = comboBox1.SelectedItem.ToString(); // 获取下拉框内容
            switch (selestyle)
            {
                case "老师":
                    if (admTt.Equals(id)&&pwdTt.Equals(pwd))
                    {
                        Main teacher = new Main();
                        teacher.Show(); // teacher界面显示
                        this.Hide(); // 登录框隐藏
                    }
                    else
                    {
                        MessageBox.Show("登录失败");
                    }
                    break;
                case "学生":
                    if (admSt.Equals(id)&&pwdSt.Equals(pwd))
                    {
                        Student student = new Student();
                        student.Show();// student界面显示
                        this.Hide();
                    }
                    else
                    {
                        MessageBox.Show("登录失败");
                    }
                    break;
                default:
                    break;
            }
        }
    }
}

namespace TeacherManage
{
    public partial class Main : Form
    {
        public Main()
        {
            InitializeComponent();
        }

        private void Main_Load(object sender, EventArgs e)
        {
            this.Text = "Teacher";
            groupBox1.Visible = false; //  修改密码框 隐藏
            groupBox2.Visible = false; // 添加学生框 隐藏
            groupBox3.Visible = false;// 个人信息 隐藏
            foreach (TreeNode tree in treeView1.Nodes) //遍历根节点集合 获取班级根节点名称
            {
                comboBox1.Items.Add(tree.Text); // 班级根节点名称添加到下拉框中
            }
            comboBox1.SelectedIndex = 0; //默认显示索引为0的第一个名称*/
            comboBox1.DropDownStyle = ComboBoxStyle.DropDownList; // 设置不能输入
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            toolStripStatusLabel7.Text = DateTime.Now.ToString(); // 添加时间
        }

        private void 修改密码ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            groupBox1.Visible = true; // 修改框显示
            groupBox2.Visible = false;// 添加学生隐藏
            groupBox3.Visible = false;// 个人信息隐藏
        }
        // 修改密码
        private void button1_Click(object sender, EventArgs e)
        {
            string oldpwd = textBox1.Text; // 初始密码
            string newpwd = textBox2.Text; // 新密码
            string repwd = textBox3.Text; // 确认密码
            if (oldpwd.Equals("")|| newpwd.Equals("")|| repwd.Equals(""))
            {
                MessageBox.Show("请填写必填项");
                return;
            }
            if (oldpwd.Equals("admin"))
            {
                if (newpwd.Equals(repwd))
                {
                    DialogResult result= MessageBox.Show("修改成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    if (result== DialogResult.OK) // 点击弹框按钮的确认
                    {
                        groupBox1.Visible = false; // 修改密码框隐藏
                    }
                }
                else
                {
                    MessageBox.Show("新密码与确认密码不匹配");
                }
            }
            else
            {
                MessageBox.Show("原密码错误请联系管理员");
            }
        }
        private void 切换用户ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form1 form = new Form1();
            form.Show(); // 登录框显示
            this.Hide();  // teacher界面隐藏
        }

        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();// 关闭界面
        }

        private void 添加学生ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            groupBox2.Visible=true; //添加学生框显示
            groupBox1.Visible = false; // 修改密码框隐藏
            groupBox3.Visible = false; //个人信息 隐藏
        }
        // 添加学生
        private void button2_Click(object sender, EventArgs e)
        {
            string name = textBox4.Text; // 添加学生的姓名
            if (name.Equals(""))
            {
                MessageBox.Show("请输入姓名");
                return;
            }
            string cname = comboBox1.Text.ToString(); // 获取下拉框中班级名
            foreach (TreeNode it in treeView1.Nodes) // 遍历班级根节点
            {
                if (it.Text==cname) // 班级根节点与下拉框中班级名相同时
                {
                    it.Nodes.Add(name); // 将学生名添加到此班级名中
                }
            }
        }

        private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TreeNode node = treeView1.SelectedNode; // 点击的此节点
            foreach (TreeNode item in treeView1.Nodes) // 获取根节点
            {
                if (item.Text==node.Text) // 点击的节点值与根节点值相同时
                {
                    MessageBox.Show("不能删除班级");
                    return;
                }
            }
            node.Remove(); // 删除节点
        }
        // 关闭所有页面
        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            groupBox1.Visible = false;
            groupBox2.Visible = false;
            groupBox3.Visible = false;
        }
        private void 紫色ToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            this.BackColor = Color.FromArgb(80, 00, 80);
        }

        private void 黄色ToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            this.BackColor = Color.Yellow;
        }

        private void 粉色ToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            this.BackColor = Color.Pink;
        }

        private void 自定义颜色ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            colorDialog1.ShowDialog(); // 显示显色控件 选择颜色
            this.BackColor = colorDialog1.Color;
        }

        private void 设置字体ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            fontDialog1.ShowDialog();
            this.Font = fontDialog1.Font;
        }

        private void 个人信息ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            groupBox3.Visible = true;
            groupBox1.Visible = false;
            groupBox2.Visible = false;
        }
    }
}

namespace StudentManage
{
    public partial class Student : Form
    {
        public Student()
        {
            InitializeComponent();
        }

        private void Student_Load(object sender, EventArgs e)
        {
            groupBox1.Visible = false;// 个人信息
            groupBox2.Visible = false; // 修改密码
            groupBox3.Visible = false; // 添加学科
            menuStrip1.BackColor = Color.Green;
            statusStrip1.BackColor = Color.Green;
            foreach (TreeNode tree in treeView1.Nodes) // 遍历根节点
            {
                comboBox1.Items.Add(tree.Text);// 将获取的数根节点添加到下拉框中
            }
            comboBox1.SelectedIndex = 0;
            comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;// 设置为不能输入

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            toolStripStatusLabel4.Text = DateTime.Now.ToString();
        }

        private void 个人信息ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            groupBox1.Visible = true;
            groupBox2.Visible = false;
            groupBox3.Visible = false;
        }
        private void 退出ToolStripMenuItem1_Click_1(object sender, EventArgs e)
        {
            this.Close();
        }

        private void 切换用户ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form1 form = new Form1();
            form.Show();
            this.Hide();
        }

        private void 修改密码ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            groupBox2.Visible = true;
            groupBox1.Visible = false;
            groupBox3.Visible = false;
        }
        //确认修改密码
        private void button1_Click(object sender, EventArgs e)
        {
            string lopwd = textBox1.Text; // 原始密码
            string newpwd = textBox2.Text; // 新密码
            string repwd = textBox3.Text; // 确认新密码
            if (lopwd.Equals("")||newpwd.Equals("")||repwd.Equals(""))
            {
                MessageBox.Show("请填写必选项");
                return;
            }
            if (lopwd.Equals("admin"))
            {
                if (newpwd.Equals(repwd))
                {
                    DialogResult rest = MessageBox.Show("修改成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    if (rest==DialogResult.OK)
                    {
                        groupBox2.Visible = false;// 修改密码框隐藏
                    }
                    else
                    {
                        textBox1.Text = "";
                        textBox2.Text = "";
                        textBox3.Text = "";
                        MessageBox.Show("新密码与确认密码不匹配");
                    }
                }
            }
            else
                {
                    textBox1.Text = "";
                    textBox2.Text = "";
                    textBox3.Text = "";
                MessageBox.Show("请联系管理员");
                }
        }

        private void 添加学科ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            groupBox3.Visible = true;
            groupBox1.Visible = false;
            groupBox2.Visible = false;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string suBject = comboBox1.Text.ToString();// 科目
            string coUrse = textBox4.Text; //课程
            if (coUrse.Equals(""))
            {
                MessageBox.Show("请填写必选项");
            }
            foreach ( TreeNode it in treeView1.Nodes)
            {
                if (it.Text.Equals(suBject))
                {
                    it.Nodes.Add(coUrse); 
                    textBox4.Text = ""; 
                }
            }
        }
        private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TreeNode treeNo = treeView1.SelectedNode;
            foreach (TreeNode tree in treeView1.Nodes)
            {
                if (tree.Text==treeNo.Text)
                {
                    MessageBox.Show("无法删除");
                    return;
                }
            }
            treeNo.Remove();
        }
    }
}