/// <summary>
 /// Search for Customer information via phone
 /// Fill in TextBox
 /// </summary>
 private void SearchBtn_Click(object sender, RoutedEventArgs e)
 {
     if (ContractsDetailsPhoneNoTbx.Text == "")
     {
         MessageBox.Show("请输入搜索的电话号码!");
     }
     else
     {
         try
         {
             var customer = facade.GetCustomerViaPhone(ContractsDetailsPhoneNoTbx.Text);
             ContractsDetailsNameTbx.Text         = customer.Name;
             ContractsDetailsCreditCardNoTbx.Text = customer.IDcard;
             ContractsDetailsConpanyTbx.Text      = customer.Company;
             ContractsDetailsAddrTbx.Text         = customer.Address;
         }
         catch (Exception)
         {
             MessageBox.Show("找不到旅客信息!请添加新旅客!");
             CheckBoxRegister_Checked(sender, e);
         }
     }
 }