private void Btquaylai_Click(object sender, EventArgs e)
{
ManHinhChinh mhc = new ManHinhChinh();
this.Hide();
mhc.ShowDialog();
}
private void Btdangnhap_Click(object sender, EventArgs e)
{
SqlConnection cn = new SqlConnection(@"Data Source=ADMIN\SQLEXPRESS;Initial Catalog=QLBHmohinh3lop;Integrated Security=True");
string sql = "select * from TAIKHOAN where taikhoan='" + tbtaikhoan.Text + "' and matkhau='" + tbmatkhau.Text + "'";
cn.Open();
SqlCommand cmd = new SqlCommand(sql, cn);
SqlDataReader reader = cmd.ExecuteReader();
if (reader.Read() == true)
{
ManHinhChinh mhc = new ManHinhChinh();
this.Hide();
mhc.ShowDialog();
//this.Show();
}
else
{
MessageBox.Show("Sai tên tài khoản hoặc mật khẩu");
}
}
