第1页 / 共17页
第2页 / 共17页
第3页 / 共17页
第4页 / 共17页
第5页 / 共17页
第6页 / 共17页
第7页 / 共17页
第8页 / 共17页
C# 学生管理系统.docx
实验二
设计一个学生成绩管理系统
⑴有学号,姓名,班级,成绩字段;
⑵初始化一个班级(35 人)的基本信息;
⑶统计 60 分以下,60～70,70～80,80～90,90 分以上学生信息;按四个
字段查询并列出学生信息;
⑷按学生成绩高到低,低到高进行排序.
源代码：
Form1.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace StudentSystem
{
public partial class Form1 : Form
{
private
int i = 35;
Student[] ss = new Student[500];
public Form1()
{
}
InitializeComponent();
private void label1_Click(object sender, EventArgs e)
{
}
private void label5_Click(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
for (int k = i; k < 500; k++)//最多可容纳500个学生
{
}
ss[k] = null;
ss[0]=new Student(20092901,"Pear","0903",99);//最初初始化的35个学生相关信息
ss[1]=new Student(20092902,"Mars","0904",100);
ss[2]=new Student(20092903,"Tomy","0902",51);
ss[3]=new Student(20092904,"Hap", "0903",67);
ss[4]=new Student(20092305,"Hil","0904",78.8 );
ss[5]=new Student(20092906
,"Lil","0902",84);
ss[6] = new Student(20092907,"Lucy","0903" ,66);
ss[7] = new Student(20092908,"Man","0904",78.4);
ss[8] = new Student(20092909,"John","0903",86);
ss[9]=new Student(20092910,"Crds","0903",93);
ss[10]=new Student(20092911,"Amy","0903",99);
ss[11]=new Student(20092912,"Mary","0904",100);
ss[12] = new Student(20092913,"Tom","0902", 54);
ss[13]=new Student(20092914,"Hax","0903",62);
ss[14]=new Student(20092315,"Hill","0904",79);
ss[15]=new Student(20092916,"Lily","0902",86);
ss[16]=new Student(20092917,"Lucy","0903",64);
ss[17]=new Student(20092918, "Mee","0904",
78.4);
ss[18]=new Student(20092919,"John","0903",86);
ss[19]=new Student(20092920,"Che","0903",93);
ss[20]=new Student(20092921,"Apd","0902",95);
ss[21]=new Student(20092922,"Mary","0904",100);
ss[22]=new Student(20092923,"Tom","0902",58);
ss[23]=new Student(20092924,"Hapy","0903",
68);
ss[24]=new Student(20092325,"Hill","0904",78.8);
ss[25]=new Student(20093426,"Lily","0902",
88.5);
ss[26]=new Student(20092927,"Lucy","0903",66.5);
ss[27]=new Student(20092928,"Mano","0904",
78.4);
ss[28]=new Student(20092929,"John","0903",86.5);
ss[29]=new Student(20092930,"Cer","0903",93.5);
ss[30]=new Student(20092931,"Ale","0902",92.5);
ss[31]=new Student(20092932 ,"Mgo","0904",
78.5);
ss[32]=new Student(20092933,"John","0903", 86.7);
ss[33]=new Student(20092934,"Cer","0903",93.0);
ss[34]=new Student(20092935,"Aple","0902",91.5);
comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
comboBox1.Items.Add("六十分以下");
comboBox1.Items.Add("六十到七十");
comboBox1.Items.Add("七十到八十");
comboBox1.Items.Add("八十到九十");
comboBox1.Items.Add("九十到一百");
comboBox2.DropDownStyle = ComboBoxStyle.DropDownList;
comboBox2.Items.Add("递增排序");
comboBox2.Items.Add("递减排序");
comboBox3.DropDownStyle = ComboBoxStyle.DropDownList;
comboBox3.Items.Add("班级");
comboBox3.Items.Add("姓名");
comboBox3.Items.Add("学号");
}
private void label2_Click(object sender, EventArgs e)
{
}
private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
{
if (comboBox2.SelectedIndex == 0)
{
//冒泡
Student temp = new Student();
temp=null;
for (int j = i; j >1; j--)
for (int k = 0; k < j-1; k++)
{
if (ss[k].getGrade() > ss[k + 1].getGrade())
{
temp = ss[k];
ss[k] = ss[k + 1];
ss[k + 1] = temp;
}
}
listBox1.Items.Clear();
listBox1.Items.Insert(0, "增序排列");
listBox1.Items.Insert(1, "ID
Name Class Grade");
for (int j = 0; j < i; j++)
{
listBox1.Items.Insert(j + 2, ss[j].getNum() + "
" + ss[j].getName() + '\t'
+ ss[j].getBj() + '\t' + ss[j].getGrade());
}
}
if (comboBox2.SelectedIndex == 1)
{//冒泡
Student temp = new Student();
for (int j = i; j > 1; j--)
for (int k = 0; k < j-1; k++)
{
}
if (ss[k].getGrade() < ss[k + 1].getGrade())
{
}
temp = ss[k];
ss[k] = ss[k + 1];
ss[k + 1] = temp;
listBox1.Items.Clear();
listBox1.Items.Insert(0, "降序排列");
listBox1.Items.Insert(1, "ID
Name Class Grade");
for (int j = 0; j < i; j++)
{
listBox1.Items.Insert(j+2, ss[j].getNum() +"
" + ss[j].getName() + '\t'+
ss[j].getBj() + '\t' + ss[j].getGrade());
}
}
}
private void button1_Click(object sender, EventArgs e)
{
String id_s = textBox1.Text;
int id = Convert.ToInt32(id_s);
String n = textBox2.Text;
String b = textBox3.Text;
String gr = textBox4.Text;
double g = Convert.ToDouble(gr);
ss[i] = new Student(id, n, b, g);
listBox1.Items.Insert(++i, textBox1.Text + '\t' + textBox2.Text + '\t' +
textBox3.Text + '\t' + textBox4.Text);
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
switch (comboBox1.SelectedIndex)
{
case 0:
listBox1.Items.Clear();
listBox1.Items.Insert(0, "60以下：");
listBox1.Items.Insert(1, "ID
Name
Class
Grade");
int f = 2;
for (int j = 0; j < i; j++)
{
double g1 = ss[j].getGrade() / 10;
int floor = (int)System.Math.Floor(g1);
if (floor < 6)
{
+ ss[j].getName() + '\t' + ss[j].getBj() + '\t' + Convert.ToString(ss[j].getGrade()));
listBox1.Items.Insert(f,Convert.ToString(ss[j].getNum()) + "
"
f++;
}
}
break;
case 1:
listBox1.Items.Clear();
listBox1.Items.Insert(0, "60-70：");
listBox1.Items.Insert(1, "ID
Name
Class
Grade");
int a = 2;
for (int j = 0; j < i; j++)
{
double g1 = ss[j].getGrade() / 10;
int floor = (int)System.Math.Floor(g1);
if (floor >=6&&floor<7)
{
+ '\t' + ss[j].getBj() + '\t' + ss[j].getGrade());
listBox1.Items.Insert(a++,ss[j].getNum() + "
" + ss[j].getName()
}
}
break;
case 2:
listBox1.Items.Clear();
listBox1.Items.Insert(0, "70-80：");
listBox1.Items.Insert(1, "ID
Name
Class
Grade");
int b = 2;
for (int j = 0; j < i; j++)
{
double g1 = ss[j].getGrade() / 10;
int floor = (int)System.Math.Floor(g1);
if (floor >=7&&floor<8)
{
ss[j].getName() + '\t' + ss[j].getBj() + '\t' + ss[j].getGrade());
listBox1.Items.Insert(b++,ss[j].getNum() + "
" +
}
}
break;
case 3:
listBox1.Items.Clear();
listBox1.Items.Insert(0, "80-90：");
listBox1.Items.Insert(1, "ID
Name
Class
Grade");
int c = 2;
for (int j = 0; j < i; j++)
{
double g1 = ss[j].getGrade() / 10;
int floor = (int)System.Math.Floor(g1);
if (floor >=8&&floor<9)
{
+ '\t' + ss[j].getBj() + '\t' + ss[j].getGrade());
listBox1.Items.Insert(c++, ss[j].getNum() + "
" + ss[j].getName()
}
}
break;
case 4:
listBox1.Items.Clear();
listBox1.Items.Insert(0, "90-100：");
listBox1.Items.Insert(1, "ID
Name
Class
Grade");
int d = 2;
for (int j = 0; j < i; j++)
{
double g1 = ss[j].getGrade() / 10;
int floor = (int)System.Math.Floor(g1);
if (floor >= 9)
{
+ '\t' + ss[j].getBj() + '\t' + ss[j].getGrade());
listBox1.Items.Insert(d++,ss[j].getNum() + "
"+ ss[j].getName()
}
}
break;
}
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void button2_Click(object sender, EventArgs e)
{
listBox1.Items.Clear();
listBox1.Items.Insert(0, "全部学生成绩");
listBox1.Items.Insert(1, "ID
Name
Class
Grade");
for (int j = 0; j < i; j++)
{
listBox1.Items.Insert(j+2, ss[j].getNum() + "
" + ss[j].getName() +
'\t' + ss[j].getBj() + '\t' + ss[j].getGrade());
}
}
private void button3_Click(object sender, EventArgs e)
{
if(comboBox3.SelectedIndex==0) {
listBox1.Items.Clear();
listBox1.Items.Insert(0, "按班级查询");
listBox1.Items.Insert(1, "ID
Name
Class
Grade");
int h=2;
for (int j = 0; j < i; j++)
{
if(textBox5.Text.Equals(ss[j].getBj()))
{
+ '\t' + ss[j].getBj() + '\t' + ss[j].getGrade());
listBox1.Items.Insert(h, ss[j].getNum() + "
" + ss[j].getName()
h++;
}
}
}
if(comboBox3.SelectedIndex==1) {
listBox1.Items.Clear();
listBox1.Items.Insert(0, "按姓名查询");
listBox1.Items.Insert(1, "ID
Name
Class
Grade");
int l=2;
for (int j = 0; j < i; j++)
{
if(textBox5.Text.Equals(ss[j].getName()))
{
+ '\t' + ss[j].getBj() + '\t' + ss[j].getGrade());
listBox1.Items.Insert(l, ss[j].getNum() + "
" + ss[j].getName()
l++;
}
}
}
if (comboBox3.SelectedIndex == 2)
{
listBox1.Items.Clear();
listBox1.Items.Insert(0, "按学号查询");
listBox1.Items.Insert(1, "ID
Name
Class
Grade");
int m=2;
for (int j = 0; j < i; j++)
{
if(Convert.ToDouble(textBox5.Text)==ss[j].getNum())
{
listBox1.Items.Insert(m, ss[j].getNum() + "
" + ss[j].getName()
+ '\t' + ss[j].getBj() + '\t' + ss[j].getGrade());
相关推荐
2023年江西萍乡中考道德与法治真题及答案.doc
2012年重庆南川中考生物真题及答案.doc
2013年江西师范大学地理学综合及文艺理论基础考研真题.doc
2020年四川甘孜小升初语文真题及答案I卷.doc
2020年注册岩土工程师专业基础考试真题及答案.doc
2023-2024学年福建省厦门市九年级上学期数学月考试题及答案.doc
2021-2022学年辽宁省沈阳市大东区九年级上学期语文期末试题及答案.doc
2022-2023学年北京东城区初三第一学期物理期末试卷及答案.doc
2018上半年江西教师资格初中地理学科知识与教学能力真题及答案.doc
2012年河北国家公务员申论考试真题及答案-省级.doc
2020-2021学年江苏省扬州市江都区邵樊片九年级上学期数学第一次质量检测试题及答案.doc
2022下半年黑龙江教师资格证中学综合素质真题及答案.doc
