private void cboCustomerID_SelectedIndexChanged(object sender, EventArgs e) { Load_cboPetID(); var item = this.cboCustomerID.GetItemText(this.cboCustomerID.SelectedItem); try { txtCustomerName.Text = bus_cus.Display_Customer(item).Rows[0]["NAME"].ToString(); Birthday.Value = DateTime.Parse(bus_cus.Display_Customer(item).Rows[0]["BIRTHDAY"].ToString()); txtGender.Text = bus_cus.Display_Customer(item).Rows[0]["GENDER"].ToString(); txtAddress.Text = bus_cus.Display_Customer(item).Rows[0]["ADDRESS"].ToString(); txtEmail.Text = bus_cus.Display_Customer(item).Rows[0]["EMAIL"].ToString(); txtPhonenumber.Text = bus_cus.Display_Customer(item).Rows[0]["PHONE_NUMBER"].ToString(); ResetValues_Pet(); } catch (Exception ex) { Console.WriteLine(ex.ToString()); } }