private void ReturnGV_Click(object sender, EventArgs e)
{
this.Hide();
ManHinhChinh manhinhchinh = new ManHinhChinh();
manhinhchinh.ShowDialog();
}
private void btnDangnhap_Click(object sender, EventArgs e)
{
SqlConnection connection = new SqlConnection(@"Data Source=DESKTOP-C33GCG4;Initial Catalog=quanly_Hs_Gv_THPT_3F;Integrated Security=True");
try
{
connection.Open();
string taiKhoan = textBox1.Text;
string matKhau = textBox2.Text;
string sql = "select * from DANGNHAP where TaiKhoan = '" + taiKhoan + "' and MatKhau = '" + matKhau + "'";
SqlCommand cmd = new SqlCommand(sql, connection);
SqlDataReader dta = cmd.ExecuteReader();
if (dta.Read() == true)
{
this.Hide();
ManHinhChinh manHinhChinh = new ManHinhChinh();
manHinhChinh.ShowDialog();
}
else
{
MessageBox.Show("Đăng nhập thất bại!");
}
}
catch (Exception)
{
MessageBox.Show("Lỗi kết nối");
}
}