private void btnDangky_Click(object sender, EventArgs e)
{
try
{
command = connection.CreateCommand();
string taiKhoan = txtTaikhoan.Text;
string matKhau = txtMatkhau.Text;
command.CommandText = "INSERT INTO DANGNHAP (TaiKhoan, MatKhau) VALUES ('" + taiKhoan + "', '" + matKhau + "')";
command.ExecuteNonQuery();
this.Hide();
DangNhap dangNhap = new DangNhap();
dangNhap.ShowDialog();
}
catch (Exception)
{
MessageBox.Show("Lỗi kết nối");
}
}