学生成绩管理系统代码c#+sql.doc

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Data.SqlClient;namespace 学生成绩管理系统 public partial class Login : Form static public string sn,sub; public Login() InitializeComponent(); Form2 fr2 = new Form2(); Form3 fr3 = new Form3(); Form4 fr4 = new Form4();/创建新窗体 private void Login_Load(object sender, EventArgs e) timer1.Start(); / Timer控件 private void btnlogin_Click(object sender, EventArgs e) /Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa / string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; SqlConnection conn = new SqlConnection(str);/连接数据库 conn.Open(); if( txtname .Text=|txtpassword .Text=) MessageBox.Show (请不要遗漏信息！); if (rbtnmanager.Checked) string cstr=select * from 用户登录 where 类别=管理员and 用户名=+txtname.Text.Trim ()+and 密码=+txtpassword .Text.Trim ()+; SqlCommand comm=new SqlCommand (cstr,conn ); SqlDataReader dr=comm.ExecuteReader (); if (dr.Read() sn = txtname.Text.Trim(); fr4.Show(); this.Visible = false; else MessageBox.Show(输入有误，请重新输入！); txtname.Text = ; txtpassword.Text = ; if (rbtnteacher.Checked) string cstr = select * from 用户登录 where 类别=教师and 用户名= + txtname.Text.Trim() + and 密码= + txtpassword.Text.Trim() + ; SqlCommand comm = new SqlCommand(cstr, conn); SqlDataReader dr = comm.ExecuteReader(); if (dr.Read() sn = txtname.Text.Trim(); sub = dr.GetValue(3).ToString (); fr3.Show(); this.Visible = false; else MessageBox.Show(输入有误，请重新输入！); txtname.Text = ; txtpassword.Text = ; if (rbtnstudent.Checked) string cstr = select * from 用户登录 where 类别=学生and 用户名= + txtname.Text.Trim() + and 密码= + txtpassword.Text.Trim() + ; SqlCommand comm = new SqlCommand(cstr, conn); SqlDataReader dr = comm.ExecuteReader(); if (dr.Read() sn = txtname.Text.Trim();fr2.Show(); this.Visible=false ; else MessageBox.Show(输入有误，请重新输入！); txtname.Text = ; txtpassword.Text = ; conn.Close(); conn.Dispose(); private void button2_Click(object sender, EventArgs e) Application.Exit(); private void timer1_Tick(object sender, EventArgs e) label1.Text = 当前时间为： +DateTime.Now .ToLongDateString() + +DateTime.Now.ToLongTimeString(); using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Data.SqlClient;namespace 学生成绩管理系统 public partial class Form2 : Form public Form2() InitializeComponent(); private void Form2_Load(object sender, EventArgs e) label1.Text = Login.sn + 同学,欢迎您使用本成绩管理系统！;/用窗体掉用静态变量 timer1.Start(); groupBox1.Visible = false; groupBox2.Visible = false; private void button1_Click(object sender, EventArgs e) private void button3_Click(object sender, EventArgs e) /string str = Password=kzl;Persist Security Info=True;User ID=kzl;Initial Catalog=学生成绩管理系统;Data Source=(local); /SqlConnection conn = new SqlConnection(str); /conn.Open(); /SqlDataAdapter da = new SqlDataAdapter(Select * from 学生成绩表 where 姓名=+textBox1 .Text , conn); /DataSet ds = new DataSet(); /da.Fill(ds, usertable); /dataGridView1.DataSource = ; private void toolStripButton1_Click(object sender, EventArgs e) string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; SqlConnection conn = new SqlConnection(str); conn.Open(); SqlDataAdapter da = new SqlDataAdapter(Select * from 学生成绩表 where 姓名= + Login.sn.Trim ()+,conn);/详细信息 DataSet ds = new DataSet(); da.Fill(ds, usertable); dataGridView1.DataSource = ds.Tablesusertable.DefaultView; conn.Close(); conn.Dispose(); private void toolStripButton2_Click(object sender, EventArgs e) private void toolStripButton4_Click(object sender, EventArgs e) groupBox1.Visible = true; private void button1_Click_1(object sender, EventArgs e) string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; SqlConnection conn = new SqlConnection(str); conn.Open(); if (txtnpd.Text != txtnpassword.Text) MessageBox.Show(请确认信密码的正确性！); if (txtnpd.Text =& txtnpassword.Text = ) MessageBox.Show(密码不允许为空！); if (txtnpd.Text = txtnpassword.Text & txtnpd.Text!= ) SqlCommand com = new SqlCommand(update 用户登录 set 密码= + txtnpassword.Text.Trim() + where 用户名= + Login.sn.Trim() + , conn); if (com.ExecuteNonQuery() = 1) MessageBox.Show(密码修改成功！); groupBox1.Visible = false; conn.Close(); conn.Dispose(); private void toolStripButton5_Click(object sender, EventArgs e) this.Close(); Login l = new Login(); l.Visible = true;/？、 private void toolStripButton6_Click(object sender, EventArgs e) / string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; / SqlConnection conn = new SqlConnection(str); / conn.Open(); / SqlDataAdapter da = new SqlDataAdapter(Select * from 学生成绩表 where 姓名= + Login.sn.Trim() + , conn); /DataSet ds = new DataSet(); / da.Fill(ds, usertable); / string s; / for (int i = 2; i = 6; i+) / / if (int.Parse(ds.Tablesusertable.Rows0i.ToString() 60) / s=int.Parse(ds.Tablesusertable.Rows0i.ToString(); / private void groupBox2_Enter(object sender, EventArgs e) private void toolStripButton3_Click(object sender, EventArgs e) groupBox2.Visible = true ; string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; SqlConnection conn = new SqlConnection(str); conn.Open(); SqlDataAdapter da = new SqlDataAdapter(Select * from 学生成绩表 where 姓名= + Login.sn.Trim() + , conn); DataSet ds = new DataSet(); da.Fill(ds, usertable); int max=0,min=1001; double ave=0.0; for (int i = 2; i max) max = int.Parse(ds.Tablesusertable.Rows0i.ToString (); if (int.Parse(ds.Tablesusertable.Rows0i.ToString ()min) min =int.Parse(ds.Tablesusertable.Rows0i.ToString(); txthscore.Text = max.ToString (); txtlscore.Text = min.ToString (); txtall.Text =ds.Tablesusertable.Rows0总分.ToString (); ave = int.Parse(ds.Tablesusertable.Rows0总分.ToString()/(double)5; txtave.Text = ave.ToString(); conn.Close(); conn.Dispose(); private void timer1_Tick(object sender, EventArgs e) label6.Text = 当前时间为： + DateTime.Now.ToLongDateString() + DateTime.Now.ToLongTimeString(); using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Data.SqlClient;namespace 学生成绩管理系统 public partial class Form3 : Form public Form3() InitializeComponent(); private void Form3_Load(object sender, EventArgs e) lblshow.Text = Login.sn + 老师，欢迎使用本成绩管理系统！; textBox2.Text = Login.sub; groupBox3.Visible = false;/修改密码的框 timer1.Start(); /string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; /SqlConnection conn = new SqlConnection(str); /conn.Open(); /SqlDataAdapter da = new SqlDataAdapter(Select * from 学生成绩表 , conn); /DataSet ds = new DataSet(); /da.Fill(ds, chaxun); /dataGridView1.DataSource = ds.Tableschaxun.DefaultView; private void button1_Click_1(object sender, EventArgs e)/查找框 string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; SqlConnection conn = new SqlConnection(str); conn.Open(); if (comboBox1.Text = 学号) SqlCommand cm = new SqlCommand(Select 学号,姓名, + Login.sub + from 学生成绩表 where 学号= + textBox1.Text + , conn); if (cm.ExecuteScalar() = null) MessageBox.Show(查无此人！); else SqlDataAdapter da = new SqlDataAdapter(Select 学号,姓名, + Login.sub + from 学生成绩表 where 学号= + textBox1.Text + , conn); DataSet ds = new DataSet(); da.Fill(ds, chaxun); dataGridView1.DataSource = ds.Tableschaxun.DefaultView; if (comboBox1.Text = 姓名) SqlCommand cm = new SqlCommand(Select 学号,姓名, + Login.sub + from 学生成绩表 where 姓名= + textBox1.Text + , conn); if (cm.ExecuteScalar() = null) MessageBox.Show(查无此人！); else SqlDataAdapter da = new SqlDataAdapter(Select 学号,姓名, + Login.sub + from 学生成绩表 where 姓名= + textBox1.Text + , conn); DataSet ds = new DataSet(); da.Fill(ds, table); dataGridView1.DataSource = ds.Tablestable.DefaultView; conn.Close(); conn.Dispose(); private void textBox1_TextChanged(object sender, EventArgs e) private void 查找_Click(object sender, EventArgs e) groupBox1.Enabled = true;/查找框 private void 所有成绩_Click(object sender, EventArgs e)/菜单栏中的按钮 string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; SqlConnection conn = new SqlConnection(str); conn.Open(); SqlDataAdapter da = new SqlDataAdapter(select 学号,姓名, + Login.sub + from 学生成绩表, conn); DataSet ds = new DataSet(); da.Fill(ds, table); dataGridView1.DataSource = ds.Tablestable.DefaultView; conn.Close(); conn.Dispose(); private void button2_Click(object sender, EventArgs e)/修改 string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; SqlConnection conn = new SqlConnection(str); conn.Open(); SqlCommand com = new SqlCommand(update 学生成绩表 set + Login.sub + = + textBox3.Text + where 姓名= + textBox4.Text + , conn); if (com.ExecuteNonQuery() = 1) MessageBox.Show(修改成功！); else MessageBox.Show(修改失败，请重新输入！); conn.Close(); conn.Dispose(); private void 修改_Click(object sender, EventArgs e) groupBox2.Enabled = true; private void groupBox2_Enter(object sender, EventArgs e) private void button3_Click(object sender, EventArgs e)/修改密码 string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; SqlConnection conn = new SqlConnection(str); conn.Open(); if (txtnpd.Text != txtnpassword.Text) MessageBox.Show(请确认信密码的正确性！); if (txtnpd.Text = & txtnpassword.Text = ) MessageBox.Show(密码不允许为空！); if (txtnpd.Text = txtnpassword.Text & txtnpd.Text != ) SqlCommand com = new SqlCommand(update 用户登录 set 密码= + txtnpassword.Text.Trim() + where 用户名= + Login.sn.Trim() + , conn); if (com.ExecuteNonQuery() = 1) MessageBox.Show(密码修改成功！); groupBox3.Visible = false; conn.Close(); conn.Dispose(); private void 修改密码_Click(object sender, EventArgs e) groupBox3.Visible = true; private void 成绩统计_Click(object sender, EventArgs e) string str = Data Source=LEE-PC;Initial Catalog=学生成绩管理系统;User ID=sa;Password=sa; SqlConnection conn = new SqlConnection(str); conn.Open(); SqlDataAdapter da = new SqlDataAdapter(select 学号,姓名, + Login.sub + from 学生成绩表 order by + Login.sub + desc, conn); DataSet ds = new DataSet(); da.Fill(ds, table); dataGridView1.DataSource = ds.Tablestable.DefaultView; conn.Close(); conn.Dispose(); private void 退出_Click(object sender, EventArgs e) this.Close(); Login l = new Login(); l.Visible = true; private void timer1_Tick(object sender, EventArgs e) label8.Text = 当前时间为：n + DateTime.Now.ToLongDateString() + n + DateTime.Now.ToLongTimeString(); private void lblshow_Click(object sender, EventArgs e) private void ToolStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e) using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Data.SqlClient;namespace 学生成绩管理系统 public partial class Form4 : Form public Form4() InitializeComponent(); private void groupBox2_Enter(object sender, EventArgs e) private void Form4_Load(object sender, EventArgs e) timer1.Start(); label1.Text = Login.sn + 管理员，欢迎使用本成绩管理系统！; groupBox2.Enabled = false; private void radioButton1_CheckedChanged(object sender, EventArgs e) if (radioButton1.Checked) groupBox2.Enabled = true; txtkm.Enabled = true ; private void radioButton2_CheckedChanged(object sender, EventArgs e) if (radioButton2.Checked) groupBox2.Enabled = true; txtkm.Enabled = false; private void button2_Click(object sender, EventArgs e) txtkm.Text = txtmm.Text = txtyhm.Text = ; private void button3_Click(object sender, EventArgs e) this.Close(); Login l = new Login(); l.Visible = true; private void label2_Click(object sender, EventArgs e) private void timer1_Tick(object sender, EventArgs e) label2.Text = 当前时间为： + DateTime.Now.ToLongDateString() + + DateTime.Now.ToLongTimeString(); private vo