调用打印机拍照的工具类

来源：互联网发布：网络大电影收入计算编辑：程序博客网时间：2024/05/20 01:10
using AForge.Controls;using AForge.Video;using AForge.Video.DirectShow;using Desktop.Protocol.Models.WhCommModels;using Destop.Infrastucture.Helper.Log;using System;using System.Collections.Generic;using System.Drawing;using System.IO;using System.Linq;using System.Text;using System.Windows;using System.Windows.Media.Imaging;namespace  ATM.Launcher.Helper{    /// <summary>    /// 摄像头拍照    /// </summary>    public class TakePhotoHelper    {        private VideoSourcePlayer VideoSrcPlayer = new VideoSourcePlayer();        private static readonly object lockobj = new object();        private static TakePhotoHelper instance = null;        private VideoCaptureDevice videoSource0 ;        private TakePhotoHelper() { }        public static TakePhotoHelper Instance        {            get            {                lock (lockobj)                {                    if (instance == null)                    {                        instance = new TakePhotoHelper();                    }                    return instance;                }            }        }        public bool Start()        {            try            {                FilterInfoCollection devices = new FilterInfoCollection(FilterCategory.VideoInputDevice);                if (devices.Count <= 0)                {                    return false;                }                videoSource0 = new VideoCaptureDevice(devices[0].MonikerString);                videoSource0.DesiredFrameRate = 30;                this.OpenVideoSource(videoSource0);            }            catch (Exception ex)            {                WMSLog.WriteLog(LogType.Error, ex.Message);                return false;            }            return true;        }        private void OpenVideoSource(IVideoSource source)        {            VideoSrcPlayer.SignalToStop();            VideoSrcPlayer.WaitForStop();            VideoSrcPlayer.VideoSource = source;            VideoSrcPlayer.Start();        }        /// <summary>        /// 拍照        /// </summary>        /// <returns></returns>        public bool TakePhoto(ref WhPhoto photoShotModel)        {            if (videoSource0 == null || !videoSource0.IsRunning)            {                return false;            }            try            {                if (VideoSrcPlayer == null) return false;                System.Drawing.Bitmap bitmap = VideoSrcPlayer.GetCurrentVideoFrame();                if (bitmap == null) return false;                IntPtr ip = Image.FromHbitmap(bitmap.GetHbitmap()).GetHbitmap();                BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(                    ip, IntPtr.Zero, Int32Rect.Empty, System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());                bitmap.Dispose();                BitmapEncoder encoder = new JpegBitmapEncoder();                encoder.Frames.Add(BitmapFrame.Create(bitmapSource));                System.IO.MemoryStream pngMemStream = new MemoryStream();                encoder.Save(pngMemStream);                pngMemStream.Close();                byte[] imageBytes = pngMemStream.ToArray();                string url = Convert.ToBase64String(imageBytes);                photoShotModel = new WhPhoto();                photoShotModel.photo = url;                return true;            }            catch (Exception ex)            {                WMSLog.WriteLog(LogType.Error, "拍照失败：" + ex.ToString());                return false;            }        }        /// <summary>        /// 关闭摄像头        /// </summary>        public void Stop()        {            try            {                if (VideoSrcPlayer != null)                {                    //停止VideoSrcPlayer线程，否则无法关闭窗体                    VideoSrcPlayer.SignalToStop();                    VideoSrcPlayer.WaitForStop();                    VideoSrcPlayer.Dispose();                    videoSource0 = null;                }            }            catch (Exception ex)            {                WMSLog.WriteLog(LogType.Error, "关闭摄像头失败：" + ex.ToString());            }        }    }}
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