MySchool管理系统
1.FrmLogin窗体(登陆窗体)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
//引入命名空间
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace MySchool
{
public partial class FrmLogin : Form
{
public FrmLogin()
{
InitializeComponent();
}
private void btnLogin_Click(object sender, EventArgs e)
{
//验证用户名和密码是否匹配
//准备连接字符串
string str = "data source=.;initial catalog=Myschool;uid=sa;pwd=";
//准备连接对象
SqlConnection con = new SqlConnection(str);
//准备发送的SQL语句
string sql = "select count(1) from Student where studentName=‘"+txtUserName.Text+"‘ and loginPwd=‘"+txtPwd.Text+"‘";
//准备命令对象
SqlCommand cmd = new SqlCommand(sql,con);
//try catch 捕获异常处理
try
{
con.Open();
//执行命令
int count = Convert.ToInt32(cmd.ExecuteScalar());
if (count > 0)
{
//登陆成功 进入管理员界面
this.Hide();
FrmAdmin frm = new FrmAdmin();
//在主窗体呈现在用户肉眼之前 悄悄改变用户名文本框中的值
frm.name = txtUserName.Text;
frm.Show();
//Tool是自定义的一个工具类
Tool.pwd = txtPwd.Text;
Tool.stuname = txtUserName.Text;
}
else
{
MessageBox.Show("登录失败!");
}
}
catch (Exception)
{
MessageBox.Show("连接失败!");
}
finally
{
con.Close();
}
}
//Load里面的代码在被用户看到之前就已经被执行了
private void FrmLogin_Load(object sender, EventArgs e)
{
txtUserName.Text = "张玲";
txtPwd.Text = "000001";
}
private void txtUserName_TextChanged(object sender, EventArgs e)
{
}
private void txtPwd_TextChanged(object sender, EventArgs e)
{
}
}
}
2.登陆后进入的管理员主窗体(FrmAdmin)
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 MySchool
{
public partial class FrmAdmin : Form
{
public FrmAdmin()
{
InitializeComponent();
}
//定义一个公有变量保存登陆的用户名
public string name;
private void FrmAdmin_Load(object sender, EventArgs e)
{
//在顶部显示欢迎用户文字
this.Text = this.Text + " 欢迎您"+name;
}
private void FrmAdmin_FormClosing(object sender, FormClosingEventArgs e)
{
//点击关闭 关闭整个程序进程
Application.Exit();
}
private void toolStripDropDownButton1_Click(object sender, EventArgs e)
{
// 为AddStudent窗体设置MDI
FrmAddStudemt frm = new FrmAddStudemt();
frm.MdiParent = this;
frm.Show();
}
private void 编辑学生信息ToolStripMenuItem_Click(object sender, EventArgs e)
{
}
private void 按姓名模糊查询ToolStripMenuItem_Click(object sender, EventArgs e)
{
//为姓名模糊查询设置MDI
FrmSearchByStuName frm = new FrmSearchByStuName();
frm.MdiParent = this;
frm.Show();
}
private void tsmiselectinfoByAge_Click(object sender, EventArgs e)
{
//为根据学生年龄查询出符合的学生信息
FrmSelectByAge frm = new FrmSelectByAge();
frm.MdiParent = this;
frm.Show();
}
//点击新建学生信息按钮触发的事件
private void tsmiaddstu_Click(object sender, EventArgs e)
{
FrmAddStudemt frm = new FrmAddStudemt();
frm.MdiParent = this;
frm.Show();
}
//点击按学生姓名查询学生信息按钮触发的事件
private void tsmiSelectByName_Click(object sender, EventArgs e)
{
FrmSearchByStuName frm = new FrmSearchByStuName();
frm.MdiParent = this;
frm.Show();
}
private void tsmiHelp_Click(object sender, EventArgs e)
{
}
private void 关于ToolStripMenuItem_Click(object sender, EventArgs e)
{
//为关于窗体设置MDI
FrmChangePics frm = new FrmChangePics();
frm.MdiParent = this;
frm.Show();
}
private void tsmizhanghuguanli_Click(object sender, EventArgs e)
{
}
private void tsmixiugaiPwd_Click(object sender, EventArgs e)
{
//为修改密码设置MDI
FrmModifyPwd frm = new FrmModifyPwd();
frm.MdiParent = this;
frm.Show();
}
private void tsmiEditStuInfo_Click(object sender, EventArgs e)
{
}
}
}
3.新建用户窗体(FrmAddStudent窗体)
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.Data.SqlClient;
namespace MySchool
{
public partial class FrmAddStudemt : Form
{
public FrmAddStudemt()
{
InitializeComponent();
}
public int stuno;
//加载所有年级信息
public void LoadGradeInfo()
{
//拿到所有年级的名称
string str = "data source=.;initial catalog=MySchool;uid=sa;pwd=";
SqlConnection con = new SqlConnection(str);
string sql = "select gradeName from grade";
SqlCommand cmd = new SqlCommand(sql, con);
try
{
con.Open();
SqlDataReader dr = cmd.ExecuteReader();
if (dr != null)
{
if (dr.HasRows)
{
while (dr.Read())
{
string name = dr["gradeName"].ToString();
//为年级赋初值
cbbStuGrade.Items.Add(name);
}
//循环结束关闭读取器
dr.Close();
}
}
}
catch (Exception)
{
MessageBox.Show("连接失败!");
}
finally
{
con.Close();
}
}
public int gradeid;
//根据学号加载学生的其他信息(用于右键菜单时修改指定的学生基本信息)
public void LoadInfoByStuNo()
{
string str = "data source=.;initial catalog=MySchool;uid=sa;pwd=";
SqlConnection con = new SqlConnection(str);
string sql = "select * from student where studentno="+stuno+"";
SqlCommand cmd = new SqlCommand(sql, con);
try
{
con.Open();
SqlDataReader dr = cmd.ExecuteReader();
if(dr!=null)
{
if(dr.HasRows)
{
while(dr.Read())
{
string stuname=dr["studentname"].ToString();
txtStuName.Text = stuname;
string stuaddress=dr["address"].ToString();
txtStuAddress.Text = stuaddress;
string stuphone=dr["phone"].ToString();
txtStuPhone.Text = stuphone;
string email=dr["Email"].ToString();
txtStuEmail.Text = email;
gradeid = Convert.ToInt32(dr["gradeid"]);
string gradename = GetNameByGradeId();
cbbStuGrade.Text = gradename;
DateTime dt = Convert.ToDateTime(dr["birthday"]);
dtpBirth.Value = dt;
string sex = Convert.ToString(dr["gender"]);
if(sex.Equals("0"))
{
rbFeMale.Checked = true;
}
else if(sex.Equals("1"))
{
rbMale.Checked = true;
}
}
dr.Close();
}
}
}
catch (Exception)
{
throw;
}
}
//根据年级编号拿到年级名称
public string GetNameByGradeId()
{
string str = "data source=.;initial catalog=Myschool;uid=sa;pwd=";
SqlConnection con = new SqlConnection(str);
string sql = "select gradename from grade where gradeid=" + gradeid + "";
SqlCommand cmd = new SqlCommand(sql,con);
string gradename="";
try
{
con.Open();
gradename = Convert.ToString(cmd.ExecuteScalar());
}
catch (Exception)
{
MessageBox.Show("错误！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
con.Close();
}
return gradename;
}
private void FrmAddStudemt_Load(object sender, EventArgs e)
{
LoadGradeInfo();
//拿到选中的学生的学号
txtBStuNo.Text = stuno.ToString();
LoadInfoByStuNo();
}
private void gbzhuce_Enter(object sender, EventArgs e)
{
}
private void label5_Click(object sender, EventArgs e)
{
}
private void txtBAginPwd_TextChanged(object sender, EventArgs e)
{
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void txtBStuNo_TextChanged(object sender, EventArgs e)
{
}
private void gbBaseInfo_Enter(object sender, EventArgs e)
{
}
//添加学生信息
public void Addinfo()
{
//添加学生
string pwd;
string pwdagin;
pwd = txtBStuPwd.Text;//密码
pwdagin = txtBAginPwd.Text;//确认密码
string name = txtStuName.Text;//姓名
//获取性别
string sex = String.Empty;
if (rbMale.Checked)
{
sex = "1";
}
else
{
sex = "0";
}
//根据所选的年级名称拿到相应的年纪编号 并提交到数据库
int gid = GetIdByName();
//获取电话
string phone = txtStuPhone.Text;
//获取地址
string address = txtStuAddress.Text;
//获取出生日期
DateTime birthday = dtpBirth.Value;
//获取Email
string email = txtStuEmail.Text;
//将获取到的数据插入到数据库中
//StudentNo, LoginPwd, StudentName, Gender, GradeId, Phone, Address, Birthday, Email
string str = "data source=.;initial catalog=MySchool;uid=sa;pwd=";
SqlConnection con = new SqlConnection(str);
string sql = @"insert into Student(LoginPwd, StudentName, Gender, GradeId, Phone, Address, Birthday, Email)
values(‘" + pwd + "‘,‘" + name + "‘,‘" + sex + "‘," + gid + ",‘" + phone + "‘,‘" + address + "‘,‘" + birthday + "‘,‘" + email + "‘)";
SqlCommand cmd = new SqlCommand(sql, con);
try
{
con.Open();
int count = Convert.ToInt32(cmd.ExecuteNonQuery());
if (count > 0)
{
MessageBox.Show("添加成功!");
}
else
{
MessageBox.Show("添加失败!");
}
}
catch (Exception)
{
MessageBox.Show("网络异常!");
}
finally
{
con.Close();
}
}
//点击保存按钮时执行相应的操作
private void btnSave_Click(object sender, EventArgs e)
{
//学号文本框为空字符串时执行添加操作
if (txtBStuNo == null)
{
Addinfo();
}
//否则执行右键菜单的额修改操作
else
{
}
}
//该方法将年级名称转化成年级编号
private int GetIdByName()
{
string str = "data source=.;initial catalog=MySchool;uid=sa;pwd=";
SqlConnection con = new SqlConnection(str);
string sql = "select gradeid from grade where gradeName=‘" + cbbStuGrade .Text+ "‘";
SqlCommand cmd = new SqlCommand(sql, con);
int gid = 0;
try
{
con.Open();
gid = Convert.ToInt32(cmd.ExecuteScalar());
}
catch (Exception)
{
MessageBox.Show("网络异常!");
}
finally
{
con.Close();
}
return gid;
}
}
}
4.根据学生姓名模糊查询学生信息
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace MySchool
{
public partial class FrmSearchByStuName : Form
{
public FrmSearchByStuName()
{
InitializeComponent();
}
//加载所有DB数据到ListView 此方法接受相应按钮的SQL语句
public void LoadDataToListViewFromDB(string sql)
{
string str = "data source=.;initial catalog=MySchool;uid=sa;pwd=";
SqlConnection con = new SqlConnection(str);
SqlCommand cmd = new SqlCommand(sql, con);
try
{
con.Open();
SqlDataReader dr = cmd.ExecuteReader();
if (dr != null)
{
if (dr.HasRows)
{
while (dr.Read())
{
//形成变量
//每从DB中读取一条数据，需要形成一个ListView对象，代表的是ListView中的一行
int stuNo = Convert.ToInt32(dr["studentNO"]);
string stuname = Convert.ToString(dr["studentName"]);
string stusex = dr["gender"].ToString();
string gradename = dr["gradename"].ToString();
ListViewItem lvItem = new ListViewItem(stuNo.ToString());
lvItem.SubItems.Add(stuname);
lvItem.SubItems.Add(stusex);
lvItem.SubItems.Add(gradename);
//让lvItem和ListView关联
lvList.Items.Add(lvItem);
}
dr.Close();
}
}
}
catch (Exception)
{
MessageBox.Show("网络异常!");
}
finally
{
con.Close();
}
}
//Load中的代码在窗体展现在用户肉眼之前应经被执行 即将所有学生信息打印出来
private void FrmSearchByStuName_Load(object sender, EventArgs e)
{
string sql = @"select studentno,studentname,gender,gradename from grade,student where grade.GradeId=Student.GradeId";
LoadDataToListViewFromDB(sql);
}
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
//点击查询按钮时触发的事件
private void btnSearch_Click(object sender, EventArgs e)
{
//查询数据前，清空ListView中的数据
lvList.Items.Clear();
string sql = @"select studentno,studentname,gender,gradename
from student,grade
where student.gradeid=grade.gradeid and studentname like ‘%"+txtName.Text+"%‘";
LoadDataToListViewFromDB(sql);
}
private void txtName_TextChanged(object sender, EventArgs e)
{
string sql = @"select studentno,studentname,gender,gradename
from student,grade
where student.gradeid=grade.gradeid";
LoadDataToListViewFromDB(sql);
}
private void contextMenuStrip1_Opening(object sender, CancelEventArgs e)
{
}
private void 修改基本信息ToolStripMenuItem_Click(object sender, EventArgs e)
{
//获取用户选择的学生号
int stuno = Convert.ToInt32(lvList.SelectedItems[0].Text);
FrmAddStudemt frm = new FrmAddStudemt();
//在修改窗体出现之前,悄悄给学号文本框赋上用户选择修改的学生学号
frm.stuno = stuno;
frm.Show();
// MessageBox.Show(stuno.ToString());
}
private void toolStripMenuItem1_Click(object sender, EventArgs e)
{
}
}
}
5.帮助中的关于窗体
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 MySchool
{
public partial class FrmChangePics : Form
{
public FrmChangePics()
{
InitializeComponent();
}
//定义一个变量保存图片索引值
private int index = 0;
private void timer1_Tick(object sender, EventArgs e)
{
if (index < imgList.Images.Count - 1)
{
index++;
}
else
{
index = 0;
}
picImage.Image = imgList.Images[index];
}
private void btnOk_Click(object sender, EventArgs e)
{
this.Close();
}
private void FrmChangePics_Load(object sender, EventArgs e)
{
}
}
}
关于窗体设计,请听下回分解
时间： 2024-10-17 21:27:31