frmAddstu fastu = new frmAddstu(); fastu.MdiParent = this; fastu.Show(); } private void 查询学籍信息 ToolStripMenuItem_Click(object sender, EventArgs e) { frmQuerystu fqstu = new frmQuerystu(); fqstu.MdiParent = this; fqstu.Show(); } private void 重新登录 ToolStripMenuItem_Click(object sender, EventArgs e) { Login2 login = new Login2(this); login.MdiParent = this; login.Show();
public Login(Main yy) { InitializeComponent();
xx=yy; } private void OKLogin_Click(object sender, EventArgs e) { string constr = "Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=SIMS;Data Source=localhost"; SqlConnection con = new SqlConnection(constr); con.Open(); string sqlstr = "select * from USERINFO where USERID= '" + LoginUser .Text + "' and USERPWD='" + LoginPWD .Text +"' "; SqlCommand cmd = new SqlCommand(sqlstr, con); string str = "select USERDES from USERINFO where USERID= '" + LoginUser.Text + "'"; SqlDataAdapter usersql = new SqlDataAdapter(str, con); DataTable userdes = new DataTable(); usersql.Fill(userdes); string strinto = "insert into Ltime(userid,logintime) values ('" + LoginUser .Text + "','" + DateTime .Now.ToString ("yyyy-MM-dd hh:mm:ss")+"')"; SqlCommand cmdin = new SqlCommand(strinto, con); try {
} } 登录 using System; using System.Collections.Generic; using ponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.SqlClient; namespace SIMS { public partial class Login : Form { Main xx; int i = 3;
fqscore.MdiParent = this; fqscore.Show(); } private void 关于系统 ToolStripMenuItem_Click(object sender, EventArgs e) { About about = new About(); about.MdiParent = this; about.Show(); } private void 登录日志 ToolStripMenuItem_Click(object sender, EventArgs e) { LoginLog llog = this; llog.Show(); }
C#程序设计作业 学生管理系统（带系统初始化） 主界面 using System; using System.Collections.Generic; using ponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.SqlClient; namespace SIMS { public partial class Main : Form { public string id; public Main() { InitializeComponent(); } private void Main_Load(object sender, EventArgs e) { Login login = new Login(this); login.MdiParent = this; login.Show(); } private void 退出系统 ToolStripMenuItem_Click(object sender, EventArgs e) { MessageBoxButtons messButton = MessageBoxButtons.OKCancel; DialogResult dr = MessageBox.Show(" 确 定 要 退 出 吗 ?", " 退 出 系 统 ", messButton); if (dr == DialogResult.OK)//如果点击“确定”按钮 { this.Close(); } else//如果点击“取消”按钮 {
} private void 浏览班级信息 ToolStripMenuItem_Click(object sender, EventArgs e) { ViewClass vclass = new ViewClass(); vclass.MdiParent = this; vclass.Show(); } private void 添加班级信息 ToolStripMenuItem_Click(object sender, EventArgs e) { frmAddclass faclass = new frmAddclass(); faclass.MdiParent = this; faclass.Show(); } private void 查询班级信息 ToolStripMenuItem_Click(object sender, EventArgs e) { frmQueryclass fqclass = new frmQueryclass(); fqclass.MdiParent = this; fqclass.Show(); } private void 添加课程信息 ToolStripMenuItem_Click(object sender, EventArgs e)
if (i > 0) { if (cmd.ExecuteScalar() != null) { MessageBox.Show("登录成功"); xx.id = LoginUser.Text.ToString(); if (userdes.Rows[0][0].ToString() == "admin") { xx.用户管理 ToolStripMenuItem.Enabled = true; xx.登录日志 ToolStripMenuItem.Enabled = true; xx.学籍管理 ToolStripMenuItem.Enabled = true; xx.添加学籍 ToolStripMenuItem.Enabled = true ; xx.添加学籍信息 ToolStripMenuItem.Enabled =true ; xx.课程管理 ToolStripMenuItem.Enabled = true; xx.添加课程信息 ToolStripMenuItem.Enabled = true ; xx.浏览课程信息 ToolStripMenuItem.Enabled = true ;
{ frmAddcourse facou = new frmAddcourse(); facou.MdiParent = this; facou.Show(); } private void 浏览课程信息 ToolStripMenuItem_Click(object sender, EventArgs e) { ViewCourse vcourse = new ViewCourse(); vcourse.MdiParent = this; vcourse.Show(); } private void 查询课程信息 ToolStripMenuItem_Click(object sender, EventArgs e) { frmQuerycourse fqcou = new frmQuerycourse(); fqcou.MdiParent = this; fqcou.Show(); } private void 设置年级课程 ToolStripMenuItem_Click(object sender, EventArgs e) { frmGradeCourse fgcou = new frmGradeCourse(); fgcou.MdiParent = this; fgcou.Show(); } private void 浏览成绩信息 ToolStripMenuItem_Click(object sender, EventArgs e) { ViewScore vscore = new ViewScore(); vscore.MdiParent = this; vscore.Show(); } private void 添加成绩信息 ToolStripMenuItem_Click(object sender, EventArgs e) { frmAddscore fascore = new frmAddscore(); fascore.MdiParent = this; fascore.Show(); } private void 修改成绩信息 ToolStripMenuItem_Click(object sender, EventArgs e) { frmQueryscore fqscore = new frmQueryscore();