private void button1_Click(object sender, EventArgs e)
{
SqlConnection cn = new SqlConnection(str);
string sql = "SELECT * FROM TaiKhoan where TaiKhoan='" + txtTaiKhoan.Text
+ "'and MatKhau='" + txtMatKhau.Text + "'";
cn.Open();
SqlCommand cmd = new SqlCommand(sql, cn);
SqlDataReader reader = cmd.ExecuteReader();
if (reader.Read())
{
cn.Close();
this.Hide();
FrmMain f = new FrmMain();
f.Show();
}
else
{
MessageBox.Show("Bạn Đăng Nhập không thành công!");
txtMatKhau.Text = "";
txtTaiKhoan.Text = "";
txtTaiKhoan.Focus();
}
}
//
private void FrmChiTietThue_FormClosed(object sender, FormClosedEventArgs e)
{
FrmMain k = new FrmMain();
k.Show();
}
private void FrmNhanVien_FormClosed(object sender, FormClosedEventArgs e)
{
FrmMain f = new FrmMain();
f.Show();
}
private void FrmKhachHang_FormClosed(object sender, FormClosedEventArgs e)
{
FrmMain f = new FrmMain();
f.Show();
}