C# 学生成绩管理系统 完整版
知识点
一种类似指针的数据结构？
文件的读取和写入 避免乱码 ansi
字符串读取后分割的bug 可能是因为编码问题导致的 为了解决这个bug 写入的时候直接用\r\n分割了 但是解决乱码问题之后可能就没有这个bug了 以后可以用\t或者space分割试试
完全面向对象用起来不是很习惯，定义全局变量都要放在一个单独的类里
窗体之间的交互也不是很会 尤其是排序那部分 每一种排序方式都是复制粘贴的 除了那个下拉菜单以外（用的switch）有没有可能定义一个全局函数？
效果
其他窗体的图懒得帖了，等完善总分平均分那部分之后一起吧
代码
program.cs
/* 学生成绩管理系统
* 待添加功能：
*
* 按照姓名查找学生
* 添加时学号重复性检查
* 一键生成学生、分数，学号重复性检查，自动添加
* 排序方式下拉菜单
* 注册账户，登录密码（有点鸡肋）
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace C_sharp学生管理系统
{
public class LinkList
{
public Node Head { set; get; } //单链表头
public int total { set; get; } //总人数
//构造
public LinkList()
{
Head = null;
total = 0;
}
//增加新元素到单链表末尾
public static void Append(int id, string name, int classnum, int chinese, int math, int english, int physics, int politics, int sports)
{
Node foot = new Node(id, name, classnum, chinese, math, english, physics, politics, sports);
Node A = new Node(id, name, classnum, chinese, math, english, physics, politics, sports);
if (PublicValue.Head == null)
{
PublicValue.Head = foot;
return;
}
A = PublicValue.Head;
while (A.Next != null)
{
A = A.Next;
}
A.Next = foot;
}
}
//全局变量
public class PublicValue
{
public static Node Head; //单链表头
public static Node Tail; //单链表尾
public static int total; //学生总数
}
static class Program
{
//应用程序的主入口点
[STAThread]
static void Main()
{
LinkList link = new LinkList();
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new MainForm());
}
}
}
mainform.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Text;
namespace C_sharp学生管理系统
{
public partial class MainForm : Form
{
public MainForm()
{
InitializeComponent();
}
//显示学生名单：从head到null遍历
private void button1_Click(object sender, EventArgs e)
{
Node B = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
B = PublicValue.Head;
textBox1.Text = "";//先清空
textBox1.Text += "学号\t姓名\t班级\t语文\t数学\t英语\t物理\t政治\t体育\t总分\t平均分\r\n";
while (B != null)
{
textBox1.Text += B.id + "\t" + B.name + "\t" + B.classnum + "\t" + B.chinese + "\t" + B.math + "\t" + B.english + "\t" + B.physics + "\t" + B.politics + "\t" + B.sports + "\t" + B.total+ "\t" + B.average.ToString("f2") + "\r\n";
B = B.Next;
}
}
//添加学生
private void add_Click(object sender, EventArgs e)
{
AddStuForm f2 = new AddStuForm();
f2.ShowDialog();
button1_Click(null, null);
}
//修改学生
private void change_Click(object sender, EventArgs e)
{
ChangeStuForm f3 = new ChangeStuForm();
f3.ShowDialog();
button1_Click(null, null);
}
//删除学生
private void delete_Click(object sender, EventArgs e)
{
DelStuForm f4 = new DelStuForm();
f4.ShowDialog();
button1_Click(null, null);
}
private void button4_Click(object sender, EventArgs e)
{
System.Environment.Exit(0);
}
private void button1_Click_1(object sender, EventArgs e)
{
SortForm f5 = new SortForm();
f5.ShowDialog();
button1_Click(null, null);
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void button2_Click(object sender, EventArgs e)
{
FindForm f6 = new FindForm();
f6.ShowDialog();
}
private void button6_Click(object sender, EventArgs e)
{
//清空txt
System.IO.File.WriteAllText(@"data.txt", string.Empty);
//写入
StreamWriter sw = new StreamWriter("data.txt", true, Encoding.Default);
Node B = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
B = PublicValue.Head;
sw.Write(PublicValue.total + "\r\n");
while (B != null)
{
sw.Write(B.id + "\r\n" + B.name + "\r\n" + B.classnum + "\r\n" + B.chinese + "\r\n" + B.math + "\r\n" + B.english + "\r\n" + B.physics + "\r\n" + B.politics + "\r\n" + B.sports + "\r\n");
B = B.Next;
}
//清空缓冲区
sw.Flush();
//关闭流
sw.Close();
MessageBox.Show("保存成功");
}
private void button5_Click(object sender, EventArgs e)
{
int i;
FileStream fs = new FileStream("data.txt", FileMode.Open);
StreamReader sr = new StreamReader(fs, Encoding.Default);
//临时接收
int id;
string name;
int classnum;
int chinese;
int math;
int english;
int physics;
int politics;
int sports;
PublicValue.total = int.Parse(sr.ReadLine());
for (i = 0; i < PublicValue.total; i++)
{
id = int.Parse(sr.ReadLine());
name = sr.ReadLine();
classnum = int.Parse(sr.ReadLine());
chinese = int.Parse(sr.ReadLine());
math = int.Parse(sr.ReadLine());
english = int.Parse(sr.ReadLine());
physics = int.Parse(sr.ReadLine());
politics = int.Parse(sr.ReadLine());
sports = int.Parse(sr.ReadLine());
LinkList.Append(id, name, classnum, chinese, math, english, physics, politics, sports);
}
sr.Close();
MessageBox.Show("导入成功");
button1_Click(null, null);
}
private void button3_Click(object sender, EventArgs e)
{
textBox1.Text = "";//先清空
textBox1.Text += " 学生成绩管理系统\r\n\r\n";
textBox1.Text += " by 寒泉hq\r\n\r\n";
textBox1.Text += " 欢迎关注我的CSDN博客\r\n\r\n";
textBox1.Text += " https://blog.csdn.net/sinat_42483341\r\n\r\n";
textBox1.Text += " 仅供学习使用 保留所有权利\r\n\r\n";
textBox1.Text += " 2019.03.10\r\n\r\n";
}
private void button7_Click(object sender, EventArgs e)
{
button6_Click(null, null);
System.Environment.Exit(0);
}
private void MainForm_Load(object sender, EventArgs e)
{
}
}
//一个节点
public class Node
{
//数据域,当前结点数据
//信息
public int id;
public string name;
public int classnum;
//分数
public int chinese { set; get; }
public int math { set; get; }
public int english { set; get; }
public int physics { set; get; }
public int politics { set; get; }
public int sports { set; get; }
public double total { set; get; }
public double average { set; get; }
//指针
public Node Next { set; get; } //位置域,下一个结点地址
//构造函数
public Node(int id, string name, int classnum, int chinese, int math, int english, int physics, int politics, int sports)
{
this.id = id;
this.name = name;
this.classnum = classnum;
this.chinese = chinese;
this.math = math;
this.english = english;
this.physics = physics;
this.politics = politics;
this.sports = sports;
this.total = this.chinese + this.math + this.english + this.physics + this.politics + this.sports;
this.average = this.total / 6;
this.Next = null;
}
}
}
sortform.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace C_sharp学生管理系统
{
public partial class SortForm : Form
{
public SortForm()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Node temp = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
Node left = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
Node right = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
Node rightmin = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
left = PublicValue.Head;
right = PublicValue.Head;
if (left == null)
{
MessageBox.Show("无法排序，请先存入数据");
}
else
{
for (; left != null; left = left.Next)//最大的数放在左边
{
right = left;
for (rightmin = right; right != null; right = right.Next)//从右边找出最小的数，用prightmax记录其位置
{
if (right.id < rightmin.id)
{
rightmin = right;
}
}
//复制粘贴好几遍，有类似于#define的使用方式吗？
temp.id = rightmin.id;
temp.name = rightmin.name;
temp.classnum = rightmin.classnum;
temp.chinese = rightmin.chinese;
temp.math = rightmin.math;
temp.english = rightmin.english;
temp.physics = rightmin.physics;
temp.politics = rightmin.politics;
temp.sports = rightmin.sports;
temp.total = rightmin.total;//补充
temp.average = rightmin.average;//补充
rightmin.id = left.id;
rightmin.name = left.name;
rightmin.classnum = left.classnum;
rightmin.chinese = left.chinese;
rightmin.math = left.math;
rightmin.english = left.english;
rightmin.physics = left.physics;
rightmin.politics = left.politics;
rightmin.sports = left.sports;
rightmin.total = left.total;//补充
rightmin.average = left.average;//补充
left.id = temp.id;
left.name = temp.name;
left.classnum = temp.classnum;
left.chinese = temp.chinese;
left.math = temp.math;
left.english = temp.english;
left.physics = temp.physics;
left.politics = temp.politics;
left.sports = temp.sports;
left.total = temp.total;//补充
left.average = temp.average;//补充
}
//输出
MessageBox.Show("排序成功");
Node cur = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
textBox1.Text = "";//先清空
textBox1.Text += "学号\t姓名\t班级\t语文\t数学\t英语\t物理\t政治\t体育\t总分\t平均分\r\n";
cur = PublicValue.Head;
while (cur != null)
{
textBox1.Text += cur.id + "\t" + cur.name + "\t" + cur.classnum + "\t" + cur.chinese + "\t" + cur.math + "\t" + cur.english + "\t" + cur.physics + "\t" + cur.politics + "\t" + cur.sports+ "\t"+cur.total + "\t" + cur.average.ToString("f2") + "\r\n";
cur = cur.Next;
}
}
}
//按班级排序
private void button2_Click(object sender, EventArgs e)
{
Node temp = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
Node left = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
Node right = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
Node rightmin = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
left = PublicValue.Head;
right = PublicValue.Head;
if (left == null)
{
MessageBox.Show("无法排序，请先存入数据");
}
else
{
for (; left != null; left = left.Next)//最大的数放在左边
{
right = left;
for (rightmin = right; right != null; right = right.Next)//从右边找出最小的数，用prightmax记录其位置
{
if (right.classnum < rightmin.classnum)
{
rightmin = right;
}
}
//复制粘贴好几遍，有类似于#define的使用方式吗？
temp.id = rightmin.id;
temp.name = rightmin.name;
temp.classnum = rightmin.classnum;
temp.chinese = rightmin.chinese;
temp.math = rightmin.math;
temp.english = rightmin.english;
temp.physics = rightmin.physics;
temp.politics = rightmin.politics;
temp.sports = rightmin.sports;
temp.total = rightmin.total;//补充
temp.average = rightmin.average;//补充
rightmin.id = left.id;
rightmin.name = left.name;
rightmin.classnum = left.classnum;
rightmin.chinese = left.chinese;
rightmin.math = left.math;
rightmin.english = left.english;
rightmin.physics = left.physics;
rightmin.politics = left.politics;
rightmin.sports = left.sports;
rightmin.total = left.total;//补充
rightmin.average = left.average;//补充
left.id = temp.id;
left.name = temp.name;
left.classnum = temp.classnum;
left.chinese = temp.chinese;
left.math = temp.math;
left.english = temp.english;
left.physics = temp.physics;
left.politics = temp.politics;
left.sports = temp.sports;
left.total = temp.total;//补充
left.average = temp.average;//补充
}
//输出
MessageBox.Show("排序成功");
Node cur = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
textBox1.Text = "";//先清空
textBox1.Text += "学号\t姓名\t班级\t语文\t数学\t英语\t物理\t政治\t体育\t总分\t平均分\r\n";
cur = PublicValue.Head;
while (cur != null)
{
textBox1.Text += cur.id + "\t" + cur.name + "\t" + cur.classnum + "\t" + cur.chinese + "\t" + cur.math + "\t" + cur.english + "\t" + cur.physics + "\t" + cur.politics + "\t" + cur.sports + "\t" + cur.total + "\t" + cur.average.ToString("f2") + "\r\n";
cur = cur.Next;
}
}
}
private void button4_Click(object sender, EventArgs e)
{
this.Close();
}
//按总分排序
private void button3_Click(object sender, EventArgs e)
{
Node temp = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
Node left = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
Node right = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
Node rightmin = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
left = PublicValue.Head;
right = PublicValue.Head;
if (left == null)
{
MessageBox.Show("无法排序，请先存入数据");
}
else
{
for (; left != null; left = left.Next)//最大的数放在左边
{
right = left;
for (rightmin = right; right != null; right = right.Next)//从右边找出最小的数，用prightmax记录其位置
{
if (right.total > rightmin.total)//从大到小 其他排序方式只改这一行即可
{
rightmin = right;
}
}
//复制粘贴好几遍，有类似于#define的使用方式吗？
temp.id = rightmin.id;
temp.name = rightmin.name;
temp.classnum = rightmin.classnum;
temp.chinese = rightmin.chinese;
temp.math = rightmin.math;
temp.english = rightmin.english;
temp.physics = rightmin.physics;
temp.politics = rightmin.politics;
temp.sports = rightmin.sports;
temp.total = rightmin.total;//补充
temp.average = rightmin.average;//补充
rightmin.id = left.id;
rightmin.name = left.name;
rightmin.classnum = left.classnum;
rightmin.chinese = left.chinese;
rightmin.math = left.math;
rightmin.english = left.english;
rightmin.physics = left.physics;
rightmin.politics = left.politics;
rightmin.sports = left.sports;
rightmin.total = left.total;//补充
rightmin.average = left.average;//补充
left.id = temp.id;
left.name = temp.name;
left.classnum = temp.classnum;
left.chinese = temp.chinese;
left.math = temp.math;
left.english = temp.english;
left.physics = temp.physics;
left.politics = temp.politics;
left.sports = temp.sports;
left.total = temp.total;//补充
left.average = temp.average;//补充
}
//输出
MessageBox.Show("排序成功");
Node cur = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
textBox1.Text = "";//先清空
textBox1.Text += "学号\t姓名\t班级\t语文\t数学\t英语\t物理\t政治\t体育\t总分\t平均分\r\n";
cur = PublicValue.Head;
while (cur != null)
{
textBox1.Text += cur.id + "\t" + cur.name + "\t" + cur.classnum + "\t" + cur.chinese + "\t" + cur.math + "\t" + cur.english + "\t" + cur.physics + "\t" + cur.politics + "\t" + cur.sports + "\t" + cur.total + "\t" + cur.average.ToString("f2") + "\r\n";
cur = cur.Next;
}
}
}
private void button5_Click(object sender, EventArgs e)
{
int choose=-1;//语文 数学 英语 物理 政治 体育
if (comboBox1.Text == "语文") choose = 0;
else if (comboBox1.Text == "数学") choose = 1;
else if (comboBox1.Text == "英语") choose = 2;
else if (comboBox1.Text == "物理") choose = 3;
else if (comboBox1.Text == "政治") choose = 4;
else if (comboBox1.Text == "体育") choose = 5;
//排序
Node temp = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
Node left = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
Node right = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
Node rightmin = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);
left = PublicValue.Head;
right = PublicValue.Head;
if (left == null)
{
MessageBox.Show("无法排序，请先存入数据");
}
else
{
for (; left != null; left = left.Next)//最大的数放在左边
{
right = left;
for (rightmin = right; right != null; right = right.Next)//从右边找出最小的数，用prightmax记录其位置
{
switch(choose)
{
case -1:
MessageBox.Show("出错了！choose=-1 没有选择");
break;
case 0:
if (right.chinese > rightmin.chinese)//从大到小
{
rightmin = right;
}
break;
case 1:
if (right.math > rightmin.math)//从大到小
{
rightmin = right;
}
break;
case 2:
if (right.english > rightmin.english)//从大到小
{
rightmin = right;
}
break;
case 3:
if (right.physics > rightmin.physics)//从大到小
{
rightmin = right;
}
break;
case 4:
if (right.politics > rightmin.politics)//从大到小
{
rightmin = right;
}
break;
case 5:
if (right.sports > rightmin.sports)//从大到小
{
rightmin = right;
}
break;
}
}
//复制粘贴好几遍，有类似于#define的使用方式吗？
temp.id = rightmin.id;
temp.name = rightmin.name;
temp.classnum = rightmin.classnum;
temp.chinese = rightmin.chinese;
temp.math = rightmin.math;
temp.english = rightmin.english;
temp.physics = rightmin.physics;
temp.politics = rightmin.politics;
temp.sports = rightmin.sports;
temp.total = rightmin.total;//补充
temp.average = rightmin.average;//补充
rightmin.id = left.id;
rightmin.name = left.name;
rightmin.classnum = left.classnum;
rightmin.chinese = left.chinese;
rightmin.math = left.math;
rightmin.english = left.english;
rightmin.physics = left.physics;
rightmin.politics = left.politics;
rightmin.sports = left.sports;
rightmin.total = left.total;//补充
rightmin.average = left.average;//补充
left.id = temp.id;
left.name = temp.name;
left.classnum = temp.classnum;
left.chinese = temp.chinese;
left.math = temp.math;
left.english = temp.english;
left.physics = temp.physics;
left.politics = temp.politics;
left.sports = temp.sports;
left.total = temp.total;//补充
left.average = temp.average;//补充
}
//输出
MessageBox.Show("排序成功");
Node cur = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
textBox1.Text = "";//先清空
textBox1.Text += "学号\t姓名\t班级\t语文\t数学\t英语\t物理\t政治\t体育\t总分\t平均分\r\n";
cur = PublicValue.Head;
while (cur != null)
{
textBox1.Text += cur.id + "\t" + cur.name + "\t" + cur.classnum + "\t" + cur.chinese + "\t" + cur.math + "\t" + cur.english + "\t" + cur.physics + "\t" + cur.politics + "\t" + cur.sports + "\t" + cur.total + "\t" + cur.average.ToString("f2") + "\r\n";
cur = cur.Next;
}
}
}
}
}
findform.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace C_sharp学生管理系统
{
public partial class FindForm : Form
{
public FindForm()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
this.Close();
}
//查找学生
private void button2_Click(object sender, EventArgs e)
{
Node cur = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
cur = PublicValue.Head;
textBox2.Text = "";//先清空
textBox2.Text += "学号\t姓名\t班级\t语文\t数学\t英语\t物理\t政治\t体育\t总分\t平均分\r\n\r\n";
int findId = int.Parse(textBox1.Text);
while (cur != null)
{
if (cur.id == findId)
{
textBox2.Text += cur.id + "\t";
textBox2.Text += cur.name + "\t";
textBox2.Text += cur.classnum + "\t";
textBox2.Text += cur.chinese + "\t";
textBox2.Text += cur.math + "\t";
textBox2.Text += cur.english + "\t";
textBox2.Text += cur.physics + "\t";
textBox2.Text += cur.politics + "\t";
textBox2.Text += cur.sports + "\t";
textBox2.Text += cur.total + "\t";
textBox2.Text += cur.average.ToString("f2") ;
break;
}
cur = cur.Next;
}
if (cur == null)
{
MessageBox.Show("你输入的学号不存在！");
}
}
}
}
delstuform.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace C_sharp学生管理系统
{
public partial class DelStuForm : Form
{
public DelStuForm()
{
InitializeComponent();
}
private void Form4_Load(object sender, EventArgs e)
{
}
//删除 点击查找信息
private void button1_Click(object sender, EventArgs e)
{
Node cur = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
cur = PublicValue.Head;
textBox2.Text = "";//先清空
textBox2.Text += "学号\t姓名\t班级\t语文\t数学\t英语\t物理\t政治\t体育\r\n\r\n";
int findId = int.Parse(textBox1.Text);
while (cur != null)
{
if (cur.id == findId)
{
textBox2.Text += cur.id + "\t";
textBox2.Text += cur.name + "\t";
textBox2.Text += cur.classnum + "\t";
textBox2.Text += cur.chinese + "\t";
textBox2.Text += cur.math + "\t";
textBox2.Text += cur.english + "\t";
textBox2.Text += cur.physics + "\t";
textBox2.Text += cur.politics + "\t";
textBox2.Text += cur.sports;
break;
}
cur = cur.Next;
}
if (cur == null)
{
MessageBox.Show("你输入的学号不存在！");
}
}
//删除学生
private void button2_Click(object sender, EventArgs e)
{
Node cur = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//大哥
Node last = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//小弟
cur = PublicValue.Head;
last = cur;
int findId = int.Parse(textBox1.Text);
//查找
while (cur != null)
{
if (cur.id == findId)//如果找到了
{
PublicValue.total--;
if (cur == PublicValue.Head)//如果删除的是头节点
{
PublicValue.Head = PublicValue.Head.Next;
MessageBox.Show("删除成功");
return;
}
else
{
last.Next = cur.Next;//垃圾回收机制？不需要自己清理内存？
MessageBox.Show("删除成功");
return;
}
}
last = cur;//小弟踩大哥脚印
cur = cur.Next;//大哥先走一步
}
if (cur == null)
{
MessageBox.Show("你删除的学号不存在！");
}
}
private void button3_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
changestuform.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace C_sharp学生管理系统
{
public partial class ChangeStuForm : Form
{
public ChangeStuForm()
{
InitializeComponent();
}
private void Form3_Load(object sender, EventArgs e)
{
}
//输入学号，点击确定
private void button1_Click(object sender, EventArgs e)
{
//遍历查找
Node cur = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
cur = PublicValue.Head;//从头开始查找
int findId = int.Parse(textBox1.Text);
while (cur != null)
{
if (cur.id == findId)
{
textBox2.Text = cur.name;
textBox3.Text = Convert.ToString(cur.classnum);
textBox4.Text = Convert.ToString(cur.chinese);
textBox5.Text = Convert.ToString(cur.math);
textBox6.Text = Convert.ToString(cur.english);
textBox7.Text = Convert.ToString(cur.physics);
textBox8.Text = Convert.ToString(cur.politics);
textBox9.Text = Convert.ToString(cur.sports);
break;
}
cur = cur.Next;
}
if (cur == null)
{
MessageBox.Show("你输入的学号不存在！");
}
}
//修改后点击确定
private void button2_Click(object sender, EventArgs e)
{
//迷之再次遍历查找
Node cur = new Node(0, "0", 0, 0, 0, 0, 0, 0, 0);//毫无意义的赋值
cur = PublicValue.Head;//从头开始查找
int findId = int.Parse(textBox1.Text);
while (cur != null)
{
if (cur.id == findId)
{
cur.name = textBox2.Text;
cur.classnum = int.Parse(textBox3.Text);
cur.chinese = int.Parse(textBox4.Text);
cur.math = int.Parse(textBox5.Text);
cur.english = int.Parse(textBox6.Text);
cur.physics = int.Parse(textBox7.Text);
cur.politics = int.Parse(textBox8.Text);
cur.sports = int.Parse(textBox9.Text);
cur.total = cur.chinese + cur.math + cur.english + cur.physics + cur.politics + cur.sports;
cur.average = cur.total / 6;
MessageBox.Show("修改成功");
break;
}
cur = cur.Next;
}
if (cur == null)
{
MessageBox.Show("修改失败，你输入的学号不存在！请不要改变刚才输入的学号");
}
}
private void button3_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
addstuform.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace C_sharp学生管理系统
{
public partial class AddStuForm : Form
{
public AddStuForm()
{
InitializeComponent();
}
///