ScanClient/code/HXX.Scanner.Biz/biz/pop/biz_pop2.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.Drawing.Imaging;

using NTwain;
using NTwain.Data;
using HXX.Scanner.Common;
using HXX.Scanner.Biz.Socket;

namespace HXX.Scanner.Biz
{
    public class biz_pop2
    {
        private DataSource source = null;
        private TwainSession session = null;
        private bool flag = false;

        public void scan(Device_Scanner scanner,System.Windows.Forms.Form main_window)
        {
            session = new TwainSession(DataGroups.Image);
            session.DataTransferred += Session_DataTransferred;
            session.DeviceEvent += Session_DeviceEvent;
            session.SourceChanged += Session_SourceChanged;
            session.TransferCanceled += Session_TransferCanceled;
            session.TransferError += Session_TransferError;
            session.TransferReady += Session_TransferReady;
            session.PropertyChanged += Session_PropertyChanged;
            session.SourceDisabled += Session_SourceDisabled;

             session.StateChanged += Session_StateChanged;


            session.Open();

            // 2. 获取设备列表（3.7.6 官方唯一方式）
            var sources = session.GetSources();

            //source = sources[index];
            foreach(var ss in sources)
            {
                if (ss.Name == scanner.deviceName)
                {
                    source = ss;
                }
            }

            // 3. 选择设备（用默认扫描仪，不弹选择框）
            //DataSource source = sources.FirstOrDefault();

            if (source == null)
            {
                //MessageBox.Show("未找到扫描仪");
                session.Close();
                return;
            }

            biz_engine_prepare.prepare();            

            // 4. 打开设备
            source.Open();

            // 5. 弹出驱动设置窗口
            source.Enable(SourceEnableMode.ShowUI, false, main_window.Handle);

            // 6. 关闭
            //source.Close();
            //session.Close();
        }

        private void Session_StateChanged(object sender, EventArgs e)
        {
            if (session.State >= 5)
            {
                flag = true;
            }

            if (flag)
            {
                if (session.State == 4)
                {
                    try
                    {
                        source.Close();
                        session.Close();
                    }
                    catch (Exception ee)
                    {

                    }
                }
            }
        }

        private void Session_SourceDisabled(object sender, EventArgs e)
        {
            twain32_events._twain32_AcquireCompleted(null, null);
            //this.close();
        }

        private void Session_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            var nn = e.PropertyName;
            var aa = 1;
        }

        private void Session_TransferReady(object sender, TransferReadyEventArgs e)
        {
            var aa = 1;
        }

        private void Session_TransferError(object sender, TransferErrorEventArgs e)
        {
            config_environment.scan_state = false;
            biz_scanHistory.end_new();

            biz_scanFinish.Work(null, new ResponseEntity<response_http_uploadImg2>() { Status = 0, Message = "发生错误" });
            biz_scanFinishBatch.Work(3, true);
        }

        private void Session_TransferCanceled(object sender, TransferCanceledEventArgs e)
        {
            var aa = 1;
        }

        private void Session_SourceChanged(object sender, EventArgs e)
        {
            var aa = 1;
        }

        private void Session_DeviceEvent(object sender, DeviceEventArgs e)
        {
            var aa = 1;
        }

        private void Session_DataTransferred(object sender, DataTransferredEventArgs e)
        {
            try
            {
                var stream = e.GetNativeImageStream();
                Image img = Image.FromStream(stream);

                var fileInfo = file_manager.get_file_info2();

                var file = fileInfo.file_full_name.Replace("bmp", "jpeg");

                img.Save(file, ImageFormat.Jpeg);

                //if (config_environment.scan_state)
                {
                    biz_scanHistory.add_history();
                    file_manager.save(file);
                }
            }
            catch (Exception ex)
            {
                LogManager.WriteLog(ex);
            }
        }

        public void close()
        {
            try
            {
                source.Close();
                session.Close();
            }
            catch (Exception ee)
            {
                LogManager.WriteLog(ee);
            }
        }
    }
}