BITableSquare/BITable/BiTable.cs

using System;
using System.Data;
using System.Linq;
using System.Windows.Forms;
using InTheHand.Net.Bluetooth;
using InTheHand.Net.Sockets;
using System.IO;
using System.Threading.Tasks;
using Newtonsoft.Json;
using System.Drawing;

namespace BITable
{
    public partial class BiTable : Form
    {
        private BluetoothClient client;
        private BluetoothDeviceInfo[] devices;
        private string currentBluetoothDeviceName;

        public BiTable()
        {
            InitializeComponent();
            BluetoothRadio.PrimaryRadio.Mode = RadioMode.Connectable;
            client = new BluetoothClient();
            lblStatus.Text = string.Empty;
        }

        private void ScanBluetoothDevices()
        {
            dgvBluetoothDevices.Invoke(new Action(() =>
            {
                dgvBluetoothDevices.Rows.Clear();
            }));

            devices = client.DiscoverDevices();
            foreach (var device in devices)
            {
                Console.WriteLine(device.DeviceName);
                dgvBluetoothDevices.Invoke(new Action(() =>
                {
                    dgvBluetoothDevices.Rows.Add(device.DeviceName);
                }));
            }
        }

        private void btnScanBluetoothDevices_Click(object sender, EventArgs e)
        {
            Task.Factory.StartNew(new Action(() =>
            {
                btnScanBluetoothDevices.Invoke(new Action(() =>
                {
                    btnScanBluetoothDevices.Enabled = false;
                }));
                ScanBluetoothDevices();
            })).ContinueWith(t =>
            {
                btnScanBluetoothDevices.Invoke(new Action(() =>
                {
                    btnScanBluetoothDevices.Enabled = true;
                }));
            });
        }

        private void dgvBluetoothDevices_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            currentBluetoothDeviceName = dgvBluetoothDevices.Rows[e.RowIndex].Cells[0].Value.ToString();
            var neededDevice = devices.Where(x => x.DeviceName == currentBluetoothDeviceName).FirstOrDefault();
            if (neededDevice != null)
            {
                client.BeginConnect(neededDevice.DeviceAddress, BluetoothService.SerialPort, new AsyncCallback(Connect), client);
            }
        }

        private void Connect(IAsyncResult result)
        {
            if (client.Connected)
            {
                SendRequestToDevice("{\"option\":\"0\", \"value\":\"0B8N62R9\"}\n");
                lblConnectedDevice.Invoke(new Action(() =>
                {
                    lblConnectedDevice.Text = $"Trạng thái: Đã kết nối tới {currentBluetoothDeviceName}";
                }));
            }
            else
            {
                lblConnectedDevice.Invoke(new Action(() =>
                {
                    lblConnectedDevice.Text = $"Trạng thái: Không thuể kết nối tới {currentBluetoothDeviceName}";
                }));
            }
        }

        private string SendRequestToDevice(string jsonObject)
        {
            Stream stream = client.GetStream();
            stream.ReadTimeout = 10000;
            StreamWriter streamWriter = new StreamWriter(stream);
            streamWriter.Write(jsonObject); //"{\"option\":\"0\", \"value\":\"0B8N62R9\"}\n"
            streamWriter.Flush();
            StreamReader streamReader = new StreamReader(stream);
            string result = streamReader.ReadLine();
            return result;
        }

        private string CreateJsonString(int option, int timeout)
        {
            return "{\"option\":\"" + option + "\", \"timeout\":\"" + timeout + "\"}\n";
        }

        private void ShowImageOnUI(RequestResult requestResult)
        {
            foreach (var item in requestResult.Data)
            {
                if (!string.IsNullOrEmpty(item.Base64))
                {
                    if (item.Type == "MT" || item.Type == "MS" || item.Type == "PRE-CMT")
                    {
                        pictureBoxIDCard.Invoke(new Action(() =>
                        {
                            pictureBoxIDCard.Image?.Dispose();
                            pictureBoxIDCard.Image = ParseImageFromBase64(item.Base64);
                        }));
                    }
                    else
                    {
                        pictureBoxFaceImage.Invoke(new Action(() =>
                        {
                            pictureBoxFaceImage.Image?.Dispose();
                            pictureBoxFaceImage.Image = ParseImageFromBase64(item.Base64);
                        }));
                    }
                }
            }
            switch (requestResult.Code)
            {
                case 2:
                    MessageBox.Show("Không chụp được ảnh chân dung", "Cảnh báo");
                    break;
                case 3:
                    MessageBox.Show("Không chụp được ảnh CMT (mặt trước hoặc măt sau)", "Cảnh báo");
                    break;
                case 4:
                    MessageBox.Show("Không chụp được ảnh chân dung và ảnh CMT", "Cảnh báo");
                    break;
                case 5:
                    MessageBox.Show("Không chụp được ảnh mặt trước CMT", "Cảnh báo");
                    break;
                case 6:
                    MessageBox.Show("Không chụp được ảnh mặt sau CMT", "Cảnh báo");
                    break;
                case 7:
                    MessageBox.Show("Không chụp được ảnh preview camera chân dung", "Cảnh báo");
                    break;
                case 8:
                    MessageBox.Show("Không chụp được ảnh preview CMT", "Cảnh báo");
                    break;
                case 400:
                    MessageBox.Show("Request bị sai cú pháp", "Cảnh báo");
                    break;
                case 401:
                    MessageBox.Show("Thiết bị đang xử lý request khác", "Cảnh báo");
                    break;
            }
        }

        private void DoRequest(int option, bool isClearFaceImage, bool isClearIDCard)
        {
            Task.Factory.StartNew(new Action(() =>
            {
                lblStatus.Invoke(new Action(() =>
                {
                    lblStatus.Text = "ĐANG XỬ LÝ";
                }));
                if (isClearIDCard)
                {
                    pictureBoxIDCard.Invoke(new Action(() =>
                    {
                        pictureBoxIDCard.Image?.Dispose();
                        pictureBoxIDCard.Image = null;
                    }));
                }

                if (isClearFaceImage)
                {
                    pictureBoxFaceImage.Invoke(new Action(() =>
                    {
                        pictureBoxFaceImage.Image?.Dispose();
                        pictureBoxFaceImage.Image = null;
                    }));
                }
                string jsonObject = CreateJsonString(option, 6);
                string result = SendRequestToDevice(jsonObject);
                var objectParsed = JsonConvert.DeserializeObject<RequestResult>(result);
                ShowImageOnUI(objectParsed);
            })).ContinueWith(t =>
            {
                lblStatus.Invoke(new Action(() =>
                {
                    lblStatus.Text = string.Empty;
                }));
            });
        }

        private void btnFaceAndPaper_Click(object sender, EventArgs e)
        {
            DoRequest(1, true, true);
        }

        private Bitmap ParseImageFromBase64(string imageBase64)
        {
            byte[] imageData = Convert.FromBase64String(imageBase64);
            using (var ms = new MemoryStream(imageData))
            {
                Bitmap image = new Bitmap(ms);
                return image;
            }
        }

        public class Base64Image
        {
            [JsonProperty("base64")]
            public string Base64 { get; set; }

            [JsonProperty("type")]
            public string Type { get; set; }
        }

        public class RequestResult
        {
            [JsonProperty("data")]
            public Base64Image[] Data { get; set; }

            [JsonProperty("code")]
            public int Code { get; set; }
        }

        private void btnFace_Click(object sender, EventArgs e)
        {
            DoRequest(2, true, false);
        }

        private void btnFontPaper_Click(object sender, EventArgs e)
        {
            DoRequest(3, false, true);
        }

        private void btnBehindPaper_Click(object sender, EventArgs e)
        {
            DoRequest(4, false, true);
        }

        private void btnFaceCamera_Click(object sender, EventArgs e)
        {
            DoRequest(5, true, false);
        }

        private void btnPaperCamera_Click(object sender, EventArgs e)
        {
            DoRequest(6, false, true);
        }
    }
}