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   源码介绍

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非常精美的一款学生管理综合程序

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 学生综合程序
{
    public partial class FrmMain : Form
    {
        /// <summary>
        /// 窗体实例化
        /// </summary>
        /// <param name="userName"></param>
        public FrmMain(string userName)
        {
            InitializeComponent();

            this.tslblFirst.Text = String.Format("登录用户：{0} 登录时间：{1}",
                userName, DateTime.Now);
        }

        /// <summary>
        /// 窗体加载
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FrmMain_Load(object sender, EventArgs e)
        {
            //给TreeView控件添加两个节点：男、女
            TreeNode node = new TreeNode();
            node.Text = "男生";
            node.ImageIndex = 0;
            this.tvStudent.Nodes.Add(node);

            node = new TreeNode();
            node.Text = "女生";
            node.ImageIndex = 1;
            this.tvStudent.Nodes.Add(node);
        }

        private void tvStudent_AfterSelect(object sender, TreeViewEventArgs e)
        {
            //让树中的节点在选中后，不改变图标
            e.Node.SelectedImageIndex =
                e.Node.ImageIndex;
        }

        /// <summary>
        /// 添加学生
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tsbtnAddStudent_Click(object sender, EventArgs e)
        {
            FrmStudent frmStudent = new FrmStudent();
            DialogResult dr = frmStudent.ShowDialog();
            if (DialogResult.OK != dr)
            {
                return;
            }

            Student student = frmStudent.student;
            #region 向列表中增加一行
            ListViewItem lvi = new ListViewItem();
            lvi.Text = student.no;
            lvi.SubItems.Add(student.name);
            lvi.SubItems.Add(student.sex);
            lvi.SubItems.Add(student.grade);
            lvi.SubItems.Add(student.major);
            lvi.SubItems.Add(student.remark);

            lvi.Tag = student;
            lvi.ImageIndex = student.sex == "男" ? 0 : 1;

            this.lvStudent.Items.Add(lvi);
            #endregion

            #region 向树形控件增加一个节点
            TreeNode tn = new TreeNode();
            tn.Text = student.name;
            tn.Tag = student;
            if (student.sex == "男")
            {
                this.tvStudent.Nodes[0].Nodes.Add(tn);
            }
            else
            {
                tn.ImageIndex = 1;
                this.tvStudent.Nodes[1].Nodes.Add(tn);
            }

            //展开树节点
            this.tvStudent.ExpandAll();
            #endregion
        }

        /// <summary>
        /// 修改学生
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tsbtnChangeStudent_Click(object sender, EventArgs e)
        {
            //如果学生列表中没有选中任何行，直接返回
            if (this.lvStudent.FocusedItem == null)
            {
                return;
            }

            ListViewItem lvi = this.lvStudent.FocusedItem;

            Student oldStudent = (Student)lvi.Tag;
            //记录修改前的学生姓名、性别，以便修改完后还能从TreeView中定位到该学生
            FrmStudent frmStudent = new FrmStudent(oldStudent);
            DialogResult dr = frmStudent.ShowDialog();
            if (dr != DialogResult.OK)
            {
                return;
            }

            Student student = frmStudent.student;
            lvi.Text = student.no;
            lvi.SubItems[1].Text = student.name;
            lvi.SubItems[2].Text = student.sex;
            lvi.SubItems[3].Text = student.grade;
            lvi.SubItems[4].Text = student.major;
            lvi.SubItems[5].Text = student.remark;
            
            lvi.Tag = student;
            lvi.ImageIndex = student.sex == "男" ? 0 : 1;

            if (oldStudent.sex == "男")
            {
                foreach (TreeNode tn in this.tvStudent.Nodes[0].Nodes)
                {
                    //找到该学生，并修改他
                    if (tn.Text == oldStudent.name)
                    {
                        tn.Text = student.name;
                        if(student.sex != oldStudent.sex)//如果性别变了
                        {
                            tn.Remove();//将其从男生节点下方移除，
                            this.tvStudent.Nodes[1].Nodes.Add(tn);//添加到女生节点下方
                            tn.ImageIndex = tn.Parent.ImageIndex;//修改其图标
                        }
                    }
                }
            }
            else
            {
                foreach (TreeNode tn in this.tvStudent.Nodes[1].Nodes)
                {
                    //找到该学生，并修改他
                    if (tn.Text == oldStudent.name)
                    {
                        tn.Text = student.name;
                        if (student.sex != oldStudent.sex)//如果性别变了
                        {
                            tn.Remove();//将其从女生节点下方移除，
                            this.tvStudent.Nodes[0].Nodes.Add(tn);//添加到男生节点下方
                            tn.ImageIndex = tn.Parent.ImageIndex;//修改其图标
                        }
                    }
                }
            }
        }

        /// <summary>
        /// 删除学生
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tsbtnDeleteStudent_Click(object sender, EventArgs e)
        {
            if (this.lvStudent.SelectedItems.Count == 0)
                return;

            DialogResult dr = MessageBox.Show("确实要删除选定的学生吗？", "删除确认",
                MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            if (dr != DialogResult.Yes)
                return;

            foreach (ListViewItem lvi in this.lvStudent.SelectedItems)
            {
                lvi.Remove();

                DeleteFromTreeView(lvi.SubItems[1].Text);
            }
        }

        /// <summary>
        /// 将指定的学生从TreeView中删除
        /// </summary>
        /// <param name="name"></param>
        private void DeleteFromTreeView(string name)
        {
            foreach (TreeNode tn in tvStudent.Nodes[0].Nodes)
            {
                if (tn.Text.Equals(name))
                {
                    tn.Remove();
                    return;
                }
            }
            foreach (TreeNode tn in tvStudent.Nodes[1].Nodes)
            {
                if (tn.Text.Equals(name))
                {
                    tn.Remove();
                    return;
                }
            }
        }

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

        private void tsmiHelp_Click(object sender, EventArgs e)
        {
            Process.Start("帮助文档.pdf");
        }

        /// <summary>
        /// 关于对话框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tsmiAbout_Click(object sender, EventArgs e)
        {
            FrmAbout frmAbout = new FrmAbout();
            frmAbout.Show();
        }

        /// <summary>
        /// 按delete键删除选定的学生
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void lvStudent_KeyDown(object sender, KeyEventArgs e)
        {
            switch (e.KeyCode)
            {
                case Keys.Delete:
                    tsbtnDeleteStudent_Click(null, null);
                    break;
            }
        }
    }
}