C# (CSharp) UsbRelayDevice.usb_relay_device_close_all_relay_channel Examples

Example #1

        private void buttonCloseAll_Click(object sender, EventArgs e)
        {
            if (SerialExist)
            {
                int deviceHandle = UsbRelayDevice.usb_relay_device_open_with_serial_number(RelaySerial, RelaySerial.Length);

                //Close all channels
                int closeResult = UsbRelayDevice.usb_relay_device_close_all_relay_channel(deviceHandle);

                if (closeResult == 0)
                {
                    MessageBox.Show("All channels are closed.");
                }
                else if (closeResult == 1)
                {
                    MessageBox.Show("Error!");
                }
                UsbRelayDevice.usb_relay_device_close(deviceHandle);
            }
            else
            {
                MessageBox.Show("Get serial number first!");
            }
        }