private void button1_Click(object sender, EventArgs e) { SqlConnection conn = new SqlConnection("server=.;database=Cml;user=sa;pwd=123"); conn.Open(); SqlCommand cmd = conn.CreateCommand(); cmd.CommandText = "select * from yonghu where username='"+textBox1.Text+"' and userpass='"+textBox2.Text+"'"; SqlDataReader dr =cmd.ExecuteReader(); if (dr.Read()) { erzhuye f = new erzhuye(); this.Owner = f; //主窗体归副窗体所有,是为了关闭副窗体的时候,主窗体也一块被关闭 this.Visible = false;//将主窗体隐藏掉 f.WindowState = FormWindowState.Maximized; f.Show(); } else { MessageBox.Show("登陆失败"); } }
private void 学生管理ToolStripMenuItem_Click(object sender, EventArgs e) { Form1 f = new Form1(); //Form1为学生信息 f.MdiParent = this; //将学生信息的父级设为副窗体的 f.Show(); } private void 教师管理ToolStripMenuItem_Click(object sender, EventArgs e) { Teacher f = new Teacher(); //teacher为教师信息 f.MdiParent = this;//将教师信息的父级设为副窗体的 f.Show(); } private void 课程管理ToolStripMenuItem_Click(object sender, EventArgs e) { Course f = new Course(); //Course为课程信息 f.MdiParent = this; //将课程信息的父级设为副窗体的 f.Show(); } private void 成绩管理ToolStripMenuItem_Click(object sender, EventArgs e) { Score f = new Score();//Score为成绩信息 f.MdiParent = this;//将成绩信息的父级设为副窗体的 f.Show(); }