private void btnAdd_Click(object sender, EventArgs e)
 {
     mode = "add";
     if (frmRemax.formToManage == "house")
     {
         frmHouse frmH = new frmHouse();
         frmH.ShowDialog();
     }
     else if (frmRemax.formToManage == "client")
     {
         frmClient frmC = new frmClient();
         frmC.ShowDialog();
     }
     else if (frmRemax.formToManage == "employee")
     {
         frmEmployee frmE = new frmEmployee();
         frmE.ShowDialog();
     }
 }
        private void btnEdit_Click(object sender, EventArgs e)
        {
            mode = "edit";
            string id = dgvResult.Rows[dgvResult.CurrentCell.RowIndex].Cells[0].Value.ToString();

            if (frmRemax.formToManage == "house")
            {
                house = HouseDB.getHouse(id);
                if (frmLogin.agent != null)
                {
                    if (house.IdAgent != frmLogin.agent.Id)
                    {
                        MessageBox.Show("The house added by another agent.You can not edit.");
                    }
                    else
                    {
                        frmHouse frmH = new frmHouse();
                        frmH.ShowDialog();
                    }
                }
                else
                {
                    frmHouse frmH = new frmHouse();
                    frmH.ShowDialog();
                }
            }
            else if (frmRemax.formToManage == "client")
            {
                client = ClientDB.getClient(id);
                frmClient frmC = new frmClient();
                frmC.ShowDialog();
            }
            else if (frmRemax.formToManage == "employee")
            {
                agent = EmployeeDB.getAgent(id);
                frmEmployee frmE = new frmEmployee();
                frmE.ShowDialog();
            }
        }