C#实现学生学籍管理系统 （Mysql）
2024-04-23 03:41:20
GitHub地址：https://github.com/Knock-man/studentStatusManagementSyatem
学籍管理系统设计
- 一、模块功能
- 二、数据库设计
- 三、窗体设计
- （一）登录界面
- （二）注册界面
- （三）主菜单
- （四）专业管理模块
- （五）班级管理
- （六）学生管理
- （七）课程管理
- （八）成绩管理
一、模块功能
设计一个用户登录界面，当用户未注册时，点击注册后跳转注册界面，注册后返回登录界面。
登录后菜单功能模块：
二、数据库设计
数据库名称:StudentStatusManagement
各实体属性
专业（专业编号，专业名称，专业描述）
班级（班级编号，班级名称，班级人数，班级描述，班主任）
学生（学生编号，学生名称，性别，年龄,学生描述）
课程（课程编号，课程学分，课程名称，课程说明）
用户（用户编号，用户名，密码）
E-R图设计
关系模式设计
专业（专业编号，专业名称，专业描述）
Major(majorId,majorName,majorExplain)班级（班级编号，班级名称，班级人数，班级描述，班主任，专业编号）
Class(classId,className,classCount,classExplain,teacher,majorId)学生（学生编号，学生名称，性别，年龄，，学生描述，班级编号）
Student(studentId,studentName,sex,age,studentExplain,classId)课程（课程编号，课程学分，课程名称，课程说明）
Course(courseId,courseGrade,courseName,courseExplain)选课（课程号，学生编号，成绩）
Choose(courseId,studentId,grade)用户（用户编号，用户名，密码）
User(userId,userName,userPassword)
建表
#建库
CREATE DATABASE IF NOT EXISTS StudentStatusManagement;
#建专业表
CREATE TABLE IF NOT EXISTS Major(majorId CHAR(10) NOT NULL PRIMARY KEY,majorName CHAR(10),majorExplain CHAR(30)
)
#建课程表
CREATE TABLE IF NOT EXISTS Course(courseId CHAR(10) NOT NULL PRIMARY KEY,courseGrade CHAR(10),courseName CHAR(10),courseExplain CHAR(30)
)
#建用户表
CREATE TABLE IF NOT EXISTS USER(userId INT NOT NULL PRIMARY KEY AUTO_INCREMENT,userName CHAR(20),userPassword CHAR(20)
)
#建班级表
CREATE TABLE IF NOT EXISTS Class(classId CHAR(10) NOT NULL PRIMARY KEY,className CHAR(10),classCount CHAR(10),classExplain CHAR(30),teacher CHAR(10),majorId char(10),FOREIGN KEY(majorId) REFERENCES Major(majorId)
)
#建学生表
CREATE TABLE IF NOT EXISTS Student(studentId char(10) NOT NULL PRIMARY KEY,studentName char(10), sex char(10),age char(10),studentExplain char(30),classId char(10),FOREIGN KEY(classId) REFERENCES Class(classId)
)
#建选课表
CREATE TABLE IF NOT EXISTS Choose(courseId char(10) not null,studentId char(10) not null,grade char(10),PRIMARY KEY(courseId,studentId),FOREIGN KEY(courseId) REFERENCES Course(courseId),FOREIGN KEY(studentId) REFERENCES Student(studentId)
)
三、窗体设计
各窗体控件名：
用户登录：
窗体名:register
用户名：userName
密码：passWord
验证码：verification用户注册：
窗体名：sign
用户名：userName
密码：passWord
确认密码：againPassword主菜单：
窗体名：Menu添加专业：
窗体名：AddProfessional
专业编号：zhuanyeId
专业名称：zhuanyeName
专业描述：describe浏览专业：
窗体名：BrowseMajor修改专业：
窗体名：UpdateMajor添加课程：
窗体名：AddCourse
课程编号:courseId
课程学分：courseCredit
课程名称：courseName
课程说明：describe浏览课程：
窗体名：BrowseCourse添加班级：
窗体名：AddClass
班级号：classId
班级名称：className
班主任：teacher
班级人数：count
所属专业：major
说明：emplain班级浏览：
窗体名：BrowseClass
班级号：classid添加学生：
窗体名：AddStudent
学号：studentId
姓名：studentName
性别：sex
年龄：age
班级编号：classId学生预览：
窗体名：BrowseStudent
学号：studentId录入成绩：
窗体名：AddScore
学号：studentId
课程号：courseId
成绩：Score成绩浏览：
窗体名：BrowseScore
（一）登录界面
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class register : Form{public register(){InitializeComponent();}private void button2_Click(object sender, EventArgs e){this.Hide();sign stu = new sign();stu.Show();}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (userName.Text==""){MessageBox.Show("用户名不能为空", "用户登录", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (passWord.Text == ""){MessageBox.Show("密码不能为空", "用户登录", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (verification.Text == ""){MessageBox.Show("验证码不能为空", "用户登录", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (verification.Text != label4.Text){MessageBox.Show("验证码错误，请重新输入", "用户登录", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else{//查询数据库账户信息string username = userName.Text;string password = passWord.Text;string sql = "SELECT COUNT(*) FROM USER WHERE userName='" + username + "' AND userPassword = '" + password + "'; ";MySqlCommand com = new MySqlCommand(sql, conn);if (Convert.ToInt32(com.ExecuteScalar())==0){MessageBox.Show("用户名或者密码错误，请重新输入", "用户登录", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else{Menu stu = new Menu();stu.Show();this.Hide();}}}private void register_Load(object sender, EventArgs e){Random rd = new Random();label4.Text = Convert.ToString(rd.Next(1000, 10000));}}
}（二）注册界面
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class sign : Form{public sign(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (userName.Text == ""){MessageBox.Show("用户名不能为空", "用户注册", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (passWord.Text == ""){MessageBox.Show("密码不能为空", "用户注册", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (againPassword.Text == ""){MessageBox.Show("请再次输入密码", "用户注册", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (passWord.Text != againPassword.Text){MessageBox.Show("两次密码输入不一致", "用户注册", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else{string username = userName.Text;string password = passWord.Text;//账户存入数据库string sql = "insert into User set userName='" + username + "',userPassword='" + password + "'";MySqlCommand com = new MySqlCommand(sql, conn);com.ExecuteNonQuery();MessageBox.Show("注册成功", "用户注册", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();register stu = new register();stu.Show();}}private void button2_Click(object sender, EventArgs e){this.Hide();register stu = new register();stu.Show();}private void sign_Load(object sender, EventArgs e){}}
}（三）主菜单
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 studentStatusManagementSyatem
{public partial class Menu : Form{public Menu(){InitializeComponent();}private void 添加专业ToolStripMenuItem_Click(object sender, EventArgs e){//打开添加专业窗口page.Text = "添加专业";AddProfessional stu = new AddProfessional();stu.Show();}private void 专业浏览ToolStripMenuItem_Click(object sender, EventArgs e){//打开浏览专业窗口page.Text = "专业浏览";BrowseMajor stu = new BrowseMajor();stu.Show();}private void 添加课程ToolStripMenuItem_Click(object sender, EventArgs e){page.Text = "添加课程";AddCourse stu = new AddCourse();stu.Show();}private void 课程浏览ToolStripMenuItem_Click(object sender, EventArgs e){page.Text = "课程浏览";BrowseCourse stu = new BrowseCourse();stu.Show();}private void 退出系统ToolStripMenuItem_Click(object sender, EventArgs e){this.Hide();register stu = new register();stu.Show();}private void 班级浏览ToolStripMenuItem_Click(object sender, EventArgs e){BrowseClass stu = new BrowseClass();stu.Show();page.Text = "班级浏览";}private void 添加班级ToolStripMenuItem_Click(object sender, EventArgs e){AddClass stu = new AddClass();stu.Show();page.Text = "添加班级";}private void 添加学生ToolStripMenuItem_Click(object sender, EventArgs e){page.Text = "添加学生";AddStudent stu = new AddStudent();stu.Show();}private void 学生浏览ToolStripMenuItem_Click(object sender, EventArgs e){page.Text = "学生预览";BrowseStudent stu = new BrowseStudent();stu.Show();}private void 录入成绩ToolStripMenuItem_Click(object sender, EventArgs e){page.Text = "添加成绩";AddScore stu = new AddScore();stu.Show();}private void 成绩浏览ToolStripMenuItem_Click(object sender, EventArgs e){page.Text = "成绩浏览";BrowseScore stu = new BrowseScore();stu.Show();}private void Menu_Load(object sender, EventArgs e){}}
}（四）专业管理模块
添加专业
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class AddProfessional : Form{public AddProfessional(){InitializeComponent();}private void button2_Click(object sender, EventArgs e){this.Hide();}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (zhuanyeId.Text == ""){MessageBox.Show("专业编号不能为空不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (zhuanyeName.Text == ""){MessageBox.Show("专业名称不能为空不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else{//数据库取数据判断专业是否存在string zhuanyeid = zhuanyeId.Text;string zhuanyename = zhuanyeName.Text;string miaoshu = textBox1.Text;string sql1 = "select count(*) from major where majorId='"+zhuanyeid+"'";MySqlCommand com = new MySqlCommand(sql1, conn);if (Convert.ToInt32(com.ExecuteScalar())>0)//专业存在{MessageBox.Show("此专业已存在", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else//添加进数据库{string sql2 = "insert into major set majorId='" + zhuanyeid + "',majorName='" + zhuanyename + "',majorExplain='" + miaoshu + "'";MySqlCommand com2 = new MySqlCommand(sql2, conn);com2.ExecuteNonQuery();MessageBox.Show("添加成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}}private void AddProfessional_Load(object sender, EventArgs e){}}
}2.浏览专业
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class BrowseMajor : Form{public static string t1;public static string t2;public static string t3;public static string[] array = new string[100];public static int index;public BrowseMajor(){InitializeComponent();}private void button3_Click(object sender, EventArgs e){this.Hide();}private void BrowseMajor_Load(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregion//获取所有专业string sql = "SELECT * FROM major";MySqlCommand com = new MySqlCommand(sql, conn);MySqlDataReader reader = com.ExecuteReader();listBox1.Items.Clear();listBox1.Items.Add(string.Format("专业编号 专业名 专业说明"));int i = 0;while (reader.Read()){listBox1.Items.Add(string.Format("{0,5}\t{1,10}\t{2,10}",reader[0],reader[1],reader[2]));array[i++] = (string)reader[0];//将编号依次存入数组}reader.Close();}private void button2_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (listBox1.SelectedIndex > 0){//删除这个专业的学生string sql3 = "DELETE student FROM Student,Class WHERE Student.classId=Class.classId AND Class.majorId='"+array[listBox1.SelectedIndex - 1]+"'";MySqlCommand comdt = new MySqlCommand(sql3, conn);comdt.ExecuteNonQuery();//先删除在这个专业的所有班级string sql1 = "DELETE FROM Class WHERE class.majorId='"+ array[listBox1.SelectedIndex - 1] + "'";MySqlCommand comd = new MySqlCommand(sql1, conn);comd.ExecuteNonQuery();//删除专业#region 删除string sql = "DELETE FROM major WHERE majorId='" + array[listBox1.SelectedIndex - 1] + "'";MySqlCommand cmd = new MySqlCommand(sql, conn);cmd.ExecuteNonQuery();#endregionMessageBox.Show("删除成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (listBox1.SelectedIndex > 0){//查数据string sql2 = "select * from major where majorId='" + array[listBox1.SelectedIndex - 1] + "'";MySqlCommand cmdd = new MySqlCommand(sql2, conn);MySqlDataReader reader = cmdd.ExecuteReader();while (reader.Read()){t1 = (string)reader[0];t2 = (string)reader[1];t3 = (string)reader[2];}reader.Close();BrowseMajor.index = listBox1.SelectedIndex - 1;UpdateMajor stu = new UpdateMajor();stu.Show(this);this.Hide();} }}
}
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class UpdateMajor : Form{public UpdateMajor(){InitializeComponent();}private void textBox1_TextChanged(object sender, EventArgs e){}private void UpdateMajor_Load(object sender, EventArgs e){textBox1.Text = BrowseMajor.t1;textBox2.Text = BrowseMajor.t2;textBox3.Text = BrowseMajor.t3;}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregion//string newt1 = textBox1.Text;string newt2 = textBox2.Text;string newt3 = textBox3.Text;string sql="UPDATE major SET majorName = '"+newt2+"', majorExplain = '"+newt3+"' WHERE majorid = '"+ BrowseMajor.array[BrowseMajor.index] + "'";MySqlCommand com = new MySqlCommand(sql, conn);com.ExecuteNonQuery();MessageBox.Show("修改成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}
}（五）班级管理
添加班级
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 MySql.Data.MySqlClient;
namespace studentStatusManagementSyatem
{public partial class AddClass : Form{public AddClass(){InitializeComponent();}private void button2_Click(object sender, EventArgs e){this.Hide();}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (classId.Text==""){MessageBox.Show("班级编号不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (className.Text == ""){MessageBox.Show("班级名称不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else{string banjiId = classId.Text;string banjiName = className.Text;string banzhur = teacher.Text;string renshu = count.Text;//获得专业名称string zhuanye = "";if (major.SelectedIndex != -1){zhuanye = major.SelectedItem.ToString();}else{major.SelectedIndex = 0;}//获得专业idstring zhuanyeId="";string sql = "select majorId from major where majorName='" + zhuanye + "'";MySqlCommand comt = new MySqlCommand(sql,conn);MySqlDataReader reader = comt.ExecuteReader();while (reader.Read()){zhuanyeId =(string) reader[0];}reader.Close();MySqlCommand comm = new MySqlCommand();string shuoming = emplain.Text;string sql1 = "select count(*) from Class where ClassId='" + banjiId + "'";MySqlCommand com = new MySqlCommand(sql1, conn);if (Convert.ToInt32(com.ExecuteScalar()) > 0)//班级存在{MessageBox.Show("此班级已存在", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else//添加进数据库{string sql2 = "insert into Class set classId='" + banjiId + "',className='" + banjiName + "',classCount='" + renshu + "',teacher='"+banzhur+"',classExplain='"+shuoming+"',majorId='"+zhuanyeId+"'";MySqlCommand com2 = new MySqlCommand(sql2, conn);com2.ExecuteNonQuery();MessageBox.Show("添加成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide(); }}}private void AddClass_Load(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregion//导入专业进集合MySqlCommand st = new MySqlCommand("select majorName from major", conn);MySqlDataReader reader1 = st.ExecuteReader();major.Items.Clear();while (reader1.Read()){major.Items.Add((string)reader1[0]);}reader1.Close();}}
}班级浏览
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class BrowseClass : Form{public static string t1 = "";public static string t2 = "";public static string t3 = "";public static string t4 = "";public static string t5 = "";public static string t6 = "";public static string[] array = new string[100];public static int index;public BrowseClass(){InitializeComponent();}private void button3_Click(object sender, EventArgs e){this.Hide();}private void button4_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionstring classId = classid.Text;string sql = "select * from Class where classId='" + classId + "'";MySqlCommand com = new MySqlCommand(sql, conn);MySqlDataReader reader = com.ExecuteReader();listBox1.Items.Clear();listBox1.Items.Add("班级编号\t班级名称\t班级人数\t班主任\t 班级说明\t");while(reader.Read()){listBox1.Items.Add(string.Format("{0}\t{1}\t{2}\t\t{3}\t {4}", reader[0], reader[1], reader[2], reader[4], reader[3] ));}if (listBox1.Items.Count == 1){MessageBox.Show("不存在此班级", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}}private void button2_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (listBox1.SelectedIndex>0){//先删除这个班的学生string sql3 = "DELETE student FROM Student WHERE Student.classId='" + array[listBox1.SelectedIndex - 1] + "'";MySqlCommand comdt = new MySqlCommand(sql3, conn);comdt.ExecuteNonQuery();//删除#region 删除string sql = "DELETE FROM Class WHERE ClassId='" + array[listBox1.SelectedIndex-1] + "'";MySqlCommand cmd = new MySqlCommand(sql, conn);cmd.ExecuteNonQuery();#endregionMessageBox.Show("删除成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}private void button1_Click(object sender, EventArgs e){if (listBox1.SelectedIndex>0){index = listBox1.SelectedIndex - 1;#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionstring sql = "select * from Class where classId='" + array[index] + "'";MySqlCommand com = new MySqlCommand(sql, conn);MySqlDataReader reader = com.ExecuteReader();while (reader.Read()){t1 = (string)reader[0];t2 = (string)reader[1];t3 = (string)reader[2];t4 = (string)reader[3];t5 = (string)reader[4];t6 = (string)reader[5];}updateClass stu = new updateClass();stu.Show();this.Hide();}}private void BrowseClass_Load(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregion//获取所有班级string sql = "SELECT * FROM Class";MySqlCommand com = new MySqlCommand(sql, conn);MySqlDataReader reader = com.ExecuteReader();listBox1.Items.Clear();listBox1.Items.Add(string.Format("班级编号\t班级名称\t班级人数\t班主任\t 班级说明\t"));int i = 0;while (reader.Read()){listBox1.Items.Add(string.Format("{0}\t{1}\t{2}\t\t{3}\t {4}", reader[0], reader[1], reader[2], reader[4], reader[3]));array[i++] = (string)reader[0];//将编号依次存入数组}reader.Close();}}
}修改班级信息
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class updateClass : Form{public updateClass(){InitializeComponent();}private void updateClass_Load(object sender, EventArgs e){classId.Text = BrowseClass.t1;className.Text = BrowseClass.t2;count.Text = BrowseClass.t3;emplain.Text = BrowseClass.t4;teacher.Text = BrowseClass.t5;#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregion//导入专业进集合MySqlCommand st = new MySqlCommand("select majorName from major", conn);MySqlDataReader reader1 = st.ExecuteReader();major.Items.Clear();while (reader1.Read()){major.Items.Add((string)reader1[0]);}reader1.Close();}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionstring banjiId = classId.Text;string banjiName = className.Text;string banzhur = teacher.Text;string renshu = count.Text;//获得专业名称string zhuanye = "";if (major.SelectedIndex != -1){zhuanye = major.SelectedItem.ToString();}else{major.SelectedIndex = 0;}//获得专业idstring zhuanyeId = "";string sql = "select majorId from major where majorName='" + zhuanye + "'";MySqlCommand comt = new MySqlCommand(sql, conn);MySqlDataReader reader = comt.ExecuteReader();while (reader.Read()){zhuanyeId = (string)reader[0];}reader.Close();string shuoming = emplain.Text;string sql2 = "update Class set className='" + banjiName + "',classCount='" + renshu + "',teacher='" + banzhur + "',classExplain='" + shuoming + "',majorId='" + zhuanyeId + "' where ClassId='"+ banjiId + "'";MySqlCommand com2 = new MySqlCommand(sql2, conn);com2.ExecuteNonQuery();MessageBox.Show("修改成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}
}（六）学生管理
添加学生
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class AddStudent : Form{public AddStudent(){InitializeComponent();}private void label2_Click(object sender, EventArgs e){}private void comboBox1_SelectedIndexChanged(object sender, EventArgs e){}private void label5_Click(object sender, EventArgs e){}private void button2_Click(object sender, EventArgs e){this.Hide();}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (studentId.Text == ""){MessageBox.Show("学号不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (studentName.Text == ""){MessageBox.Show("学生姓名不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else{// 判断该学生是否已经存在string studentage = age.Text;//获得班级名称string banji = "";if (classId.SelectedIndex != -1){banji = classId.SelectedItem.ToString();}else{classId.SelectedIndex = 0;}//获得班级idstring classid = "";string sql = "select ClassId from Class where className='" + banji + "'";MySqlCommand comt = new MySqlCommand(sql, conn);MySqlDataReader reader = comt.ExecuteReader();while (reader.Read()){classid = (string)reader[0];}reader.Close();string miashu = textBox5.Text;string studentid = studentId.Text;string studentname = studentName.Text;string studentsex = sex.SelectedItem.ToString();string sql1 = "select count(*) from Student where studentId='" + studentid + "'";MySqlCommand com = new MySqlCommand(sql1, conn);if (Convert.ToInt32(com.ExecuteScalar()) > 0)//学生存在{MessageBox.Show("此学生已存在", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else//添加进数据库{string sql2 = "insert into student set studentId='" + studentid + "',studentName='" + studentname + "',sex='" + studentsex + "',age='" + studentage + "',studentExplain='"+ miashu + "',classId='"+classid+"'";MySqlCommand com2 = new MySqlCommand(sql2, conn);com2.ExecuteNonQuery();MessageBox.Show("添加成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}}private void AddStudent_Load(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregion//导入班级进集合MySqlCommand st = new MySqlCommand("select className from Class", conn);MySqlDataReader reader1 = st.ExecuteReader();classId.Items.Clear();while (reader1.Read()){classId.Items.Add((string)reader1[0]);}reader1.Close();}}
}学生浏览
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class BrowseStudent : Form{public static string t1 = "";public static string t2 = "";public static string t3 = "";public static string t4 = "";public static string t5 = "";public static string t6 = "";public static string[] array = new string[100];public BrowseStudent(){InitializeComponent();}private void button3_Click(object sender, EventArgs e){this.Hide();}private void button4_Click(object sender, EventArgs e){string studentid = studentId.Text;#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionstring sql = "select * from Student where studentId='" + studentid + "'";MySqlCommand com = new MySqlCommand(sql, conn);MySqlDataReader reader = com.ExecuteReader();listBox1.Items.Clear();listBox1.Items.Add(" 学号\t\t姓名\t性别\t年龄\t 班级编号\t 说明\t");while (reader.Read()){listBox1.Items.Add(string.Format("{0}\t{1}\t{2}\t{3}\t{4}\t{5}", reader[0], reader[1], reader[2],reader[3],reader[5],reader[4]));}if (listBox1.Items.Count == 1){MessageBox.Show("不存在此学生", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}}private void button2_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (listBox1.SelectedIndex>0){//删除学生的所有成绩string sql1 = "delete from choose where studentId='"+ BrowseStudent.t1 + "'";MySqlCommand cmdt = new MySqlCommand(sql1, conn);cmdt.ExecuteNonQuery();//删除#region 删除string sql = "DELETE FROM Student WHERE studentId='" + BrowseStudent.t1 + "'";MySqlCommand cmd = new MySqlCommand(sql, conn);cmd.ExecuteNonQuery();#endregionMessageBox.Show("删除成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}private void button1_Click(object sender, EventArgs e){if (listBox1.SelectedIndex> 0){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionstring sql = "select * from Student where studentId='" + array[listBox1.SelectedIndex-1] + "'";MySqlCommand com = new MySqlCommand(sql, conn);MySqlDataReader reader = com.ExecuteReader();while (reader.Read()){t1 = (string)reader[0];t2 = (string)reader[1];t3 = (string)reader[2];t4 = (string)reader[3];t5 = (string)reader[4];t6 = (string)reader[5];}UpdateStudent stu = new UpdateStudent();stu.Show(this);this.Hide();}}private void BrowseStudent_Load(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregion//获取所有班级string sql = "SELECT * FROM student";MySqlCommand com = new MySqlCommand(sql, conn);MySqlDataReader reader = com.ExecuteReader();listBox1.Items.Clear();listBox1.Items.Add(string.Format(" 学号\t\t姓名\t性别\t年龄\t 班级编号\t 说明\t"));int i = 0;while (reader.Read()){listBox1.Items.Add(string.Format("{0}\t{1}\t{2}\t{3}\t{4}\t{5}", reader[0], reader[1], reader[2], reader[3], reader[5], reader[4]));array[i++] = (string)reader[0];//将编号依次存入数组}reader.Close();}}}修改学生信息
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class UpdateStudent : Form{public UpdateStudent(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (studentId.Text == ""){MessageBox.Show("学号不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (studentName.Text == ""){MessageBox.Show("学生姓名不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else{// 判断该学生是否已经存在string studentage = age.Text;//获得班级名称string banji = "";if (classId.SelectedIndex != -1){banji = classId.SelectedItem.ToString();}else{classId.SelectedIndex = 0;}//获得班级idstring classid = "";string sql = "select ClassId from Class where className='" + banji + "'";MySqlCommand comt = new MySqlCommand(sql, conn);MySqlDataReader reader = comt.ExecuteReader();while (reader.Read()){classid = (string)reader[0];}reader.Close();string miashu = textBox5.Text;string studentid = studentId.Text;string studentname = studentName.Text;string studentsex = sex.SelectedItem.ToString();string sql1 = "select count(*) from Student where studentId='" + studentid + "'"; string sql2 = "update student set studentName='" + studentname + "',sex='" + studentsex + "',age='" + studentage + "',studentExplain='" + miashu + "',classId='" + classid + "' where studentId='"+ studentid + "'";MySqlCommand com2 = new MySqlCommand(sql2, conn);com2.ExecuteNonQuery();MessageBox.Show("修改成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}private void UpdateStudent_Load(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionstudentId.Text = BrowseStudent.t1;studentName.Text = BrowseStudent.t2;age.Text = BrowseStudent.t4;textBox5.Text = BrowseStudent.t5;//导入班级进集合MySqlCommand st = new MySqlCommand("select className from Class", conn);MySqlDataReader reader1 = st.ExecuteReader();classId.Items.Clear();while (reader1.Read()){classId.Items.Add((string)reader1[0]);}reader1.Close();}}
}（七）课程管理
添加课程
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 MySql.Data.MySqlClient;
namespace studentStatusManagementSyatem
{public partial class AddCourse : Form{public AddCourse(){InitializeComponent();}private void textBox2_TextChanged(object sender, EventArgs e){}private void button2_Click(object sender, EventArgs e){this.Hide();}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (courseId.Text == ""){MessageBox.Show("课程编号不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (courseName.Text == ""){MessageBox.Show("课程名不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (courseCredit.Text == ""){MessageBox.Show("课程学分不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else{//判断课程编号是否已存在string courseid = courseId.Text;string credit = courseCredit.Text;string coursename = courseName.Text;string shuoming = textBox1.Text;//添加入课程表中string sql = "select count(*) from Course where courseId='" + courseid + "'";MySqlCommand com = new MySqlCommand(sql, conn);if (Convert.ToInt32(com.ExecuteScalar()) > 0)//课程存在{MessageBox.Show("此课程已存在", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else//添加进数据库{string sql2 = "insert into Course set courseID='" + courseid + "',courseGrade='" + credit + "',courseName='" + coursename + "',courseExplain='" + shuoming + "'";MySqlCommand com2 = new MySqlCommand(sql2, conn);com2.ExecuteNonQuery();MessageBox.Show("添加成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}}private void AddCourse_Load(object sender, EventArgs e){}}
}课程浏览
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 MySql.Data.MySqlClient;namespace studentStatusManagementSyatem
{public partial class BrowseCourse : Form{public static string t1;public static string t2;public static string t3;public static string t4;string[] array = new string[100];public BrowseCourse(){InitializeComponent();}private void button3_Click(object sender, EventArgs e){this.Hide();}private void BrowseCourse_Load(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregion//获取所有专业string sql = "SELECT * FROM course";MySqlCommand com = new MySqlCommand(sql, conn);MySqlDataReader reader = com.ExecuteReader();listBox1.Items.Clear();listBox1.Items.Add(string.Format("课程编号 课程学分 课程名称 课程说明"));int i = 0;while (reader.Read()){listBox1.Items.Add(string.Format("{0,5}\t{1,10}\t{2,15}\t{3,10}", reader[0], reader[1], reader[2],reader[3]));array[i++] = (string)reader[0];//将编号依次存入数组}reader.Close();}private void button2_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (listBox1.SelectedIndex > 0){//删除所有选课记录string sql1 = "delete from choose where courseId='" + array[listBox1.SelectedIndex - 1] + "'";MySqlCommand comt = new MySqlCommand(sql1, conn);comt.ExecuteNonQuery();//删除#region 删除string sql = "DELETE FROM Course WHERE courseId='" + array[listBox1.SelectedIndex - 1] + "'";MySqlCommand cmd = new MySqlCommand(sql, conn);cmd.ExecuteNonQuery();#endregionMessageBox.Show("删除成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (listBox1.SelectedIndex > 0){//查数据string sql2 = "select * from Course where courseId='" + array[listBox1.SelectedIndex - 1] + "'";MySqlCommand cmdd = new MySqlCommand(sql2, conn);MySqlDataReader reader = cmdd.ExecuteReader();while (reader.Read()){t1 = (string)reader[0];t2 = (string)reader[1];t3 = (string)reader[2];t4 = (string)reader[3];}reader.Close();UpdateCourse stu = new UpdateCourse();stu.Show(this);this.Hide();}}}
}课程信息修改
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 MySql.Data.MySqlClient;
namespace studentStatusManagementSyatem
{public partial class UpdateCourse : Form{public UpdateCourse(){InitializeComponent();}private void UpdateCourse_Load(object sender, EventArgs e){courseId.Text = BrowseCourse.t1;courseCredit.Text = BrowseCourse.t2;courseName.Text = BrowseCourse.t3;textBox1.Text = BrowseCourse.t4;}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionstring courseid = courseId.Text;string credit = courseCredit.Text;string coursename = courseName.Text;string shuoming = textBox1.Text;//添加入课程表中string sql2 = "update Course set courseGrade='" + credit + "',courseName='" + coursename + "',courseExplain='" + shuoming + "' where courseId='"+courseid+"'";MySqlCommand com2 = new MySqlCommand(sql2, conn);com2.ExecuteNonQuery();MessageBox.Show("修改成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}
}（八）成绩管理
录入成绩
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 MySql.Data.MySqlClient;
namespace studentStatusManagementSyatem
{public partial class AddScore : Form{public AddScore(){InitializeComponent();}private void button2_Click(object sender, EventArgs e){this.Hide();}private void button1_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (studentId.Text == ""){MessageBox.Show("学号不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (courseId.Text == ""){MessageBox.Show("课程号不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (Score.Text == ""){MessageBox.Show("成绩不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else{//判断是否已经录入string studentid = studentId.Text;string courseid = courseId.Text;string score = Score.Text;string sql1 = "SELECT COUNT(*) FROM choose WHERE studentId='"+studentid+"' AND courseId='"+courseid+"' ";//判断是否存在此学生string sql = "SELECT COUNT(*) FROM student WHERE studentId = '"+studentid+"'";MySqlCommand com1 = new MySqlCommand(sql,conn);// 判断是否存在此课程string sql3 = "SELECT COUNT(*) FROM course WHERE courseId = '" +courseid +"'";MySqlCommand com2 = new MySqlCommand(sql3, conn);MySqlCommand com = new MySqlCommand(sql1, conn);if (Convert.ToInt32(com1.ExecuteScalar())==0){MessageBox.Show("不存在此学生，请先添加", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (Convert.ToInt32(com2.ExecuteScalar()) == 0){MessageBox.Show("不存在此课程，请先添加", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else if (Convert.ToInt32(com.ExecuteScalar()) > 0)//成绩存在{MessageBox.Show("此成绩已存在", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);}else//添加进数据库{string sql2 = "insert into choose set studentId='" + studentid + "',courseId='" + courseid + "',grade='"+score+"'";MySqlCommand com3 = new MySqlCommand(sql2, conn);com3.ExecuteNonQuery();MessageBox.Show("添加成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}}private void AddScore_Load(object sender, EventArgs e){}}
}浏览成绩
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 MySql.Data.MySqlClient;
namespace studentStatusManagementSyatem
{public partial class BrowseScore : Form{public static string[] id1 = new string[100];public static string[] id2 = new string[100];public static string[] id3 = new string[100];public static int index;public BrowseScore(){InitializeComponent();}private void button3_Click(object sender, EventArgs e){this.Hide();}private void button4_Click(object sender, EventArgs e){string studentid = studentId.Text;#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionstring sql = "SELECT course.courseId,student.studentId,studentName,courseName,grade FROM choose,student,course WHERE choose.courseId=course.courseId AND choose.studentId=student.studentId AND student.studentId='"+studentid+"'";MySqlCommand com = new MySqlCommand(sql, conn);MySqlDataReader reader = com.ExecuteReader();listBox1.Items.Clear();listBox1.Items.Add("课程号\t学号\t\t 姓名\t 课程名\t\t成绩");int i = 0;while (reader.Read()){listBox1.Items.Add(string.Format("{0,5}\t{1,5}\t{2,10}\t{3,10}\t{4,10}", reader[0], reader[1], reader[2], reader[3],reader[4]));id1[i] = (string)reader[0];id2[i] = (string)reader[1];id3[i++] = (string)reader[4];}}private void button2_Click(object sender, EventArgs e){#region 连接数据库//定义连接字符串string connStr = "Database=StudentStatusManagement;Data Source=127.0.0.1;port=3306;User Id=root;";MySqlConnection conn = new MySqlConnection(connStr);//创建Connection对象conn.Open();//打开数据库#endregionif (listBox1.SelectedIndex > 0){//删除#region 删除string sql = "delete FROM choose WHERE choose.courseId='"+ id1[listBox1.SelectedIndex - 1] + "' AND choose.studentId='"+ id2[listBox1.SelectedIndex - 1] + "'";MySqlCommand cmd = new MySqlCommand(sql, conn);cmd.ExecuteNonQuery();#endregionMessageBox.Show("删除成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);this.Hide();}}private void button1_Click(object sender, EventArgs e){if (listBox1.SelectedIndex > 1){index = listBox1.SelectedIndex - 1;UpdateSocore stu = new UpdateSocore();stu.Show(this);this.Hide();}}private void BrowseScore_Load(object sender, EventArgs e){}}
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