private void btn_login_Click(object sender, EventArgs e)
{
string username = txt_username.Text;
string password = txt_password.Text;
StoreProcedure.sp_login(username, password);
StoreProcedure.fn_login_admin(username, password);
GlobalVariable._LowImageFilePath = GlobalMethod.GetLowImageFilePath("1");
this.Close();
th = new Thread(openHome);
th.SetApartmentState(ApartmentState.STA);
th.Start();
}