C#海康相机控制类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MvCamCtrl.NET;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;
using System.Drawing.Imaging;
using System.Drawing;
using System.IO;

namespace BasicDemo
{
    public class CameraHelper
    {
        [DllImport("kernel32.dll", EntryPoint = "CopyMemory", SetLastError = false)]
        public static extern void CopyMemory(IntPtr dest, IntPtr src, uint count);

        private MyCamera.MV_CC_DEVICE_INFO_LIST m_stDeviceList = new MyCamera.MV_CC_DEVICE_INFO_LIST();
        private MyCamera m_MyCamera = new MyCamera();
        private bool m_bGrabbing = false;
        private Thread m_hReceiveThread = null;
        private MyCamera.MV_FRAME_OUT_INFO_EX m_stFrameInfo = new MyCamera.MV_FRAME_OUT_INFO_EX();

        // ch:用于从驱动获取图像的缓存 | en:Buffer for getting image from driver
        private UInt32 m_nBufSizeForDriver = 0;

        private IntPtr m_BufForDriver = IntPtr.Zero;
        private static Object BufForDriverLock = new Object();
        private List<string> cbDeviceList = new List<string>();

        public bool bnTriggerMode = true;//触发模式

        public void Load(string id)
        {
            DeviceListAcq();//获取相机列表
            Open(id);//打开相机
            StartTriggerMode();//设置软触发模式
            //StartGrab();//开始采集
        }

        private Thread workerThread;

        public Bitmap Photograph()
        {
            int i = 0;
        A:

            TriggerExec();//软触发

            //Bitmap btmp = GetPicture();//获取照片
            Bitmap btmp = GetPicturen();
            if (btmp == null)
            {
                i++;
                if (i > 5)
                {
                    return null;
                }
                TriggerExec();//软触发
                goto A;
            }
            SaveImage(btmp);
            m_stFrameInfo = new MyCamera.MV_FRAME_OUT_INFO_EX();
            return btmp;
        }

        //获取设备列表
        public void DeviceListAcq()
        {
            // ch:创建设备列表 | en:Create Device List
            System.GC.Collect();
            cbDeviceList = new List<string>();
            m_stDeviceList.nDeviceNum = 0;
            int nRet = MyCamera.MV_CC_EnumDevices_NET(MyCamera.MV_GIGE_DEVICE | MyCamera.MV_USB_DEVICE, ref m_stDeviceList);
            if (0 != nRet)
            {
                ShowErrorMsg("Enumerate devices fail!", 0);
                return;
            }

            // ch:在窗体列表中显示设备名 | en:Display device name in the form list
            for (int i = 0; i < m_stDeviceList.nDeviceNum; i++)
            {
                MyCamera.MV_CC_DEVICE_INFO device = (MyCamera.MV_CC_DEVICE_INFO)Marshal.PtrToStructure(m_stDeviceList.pDeviceInfo[i], typeof(MyCamera.MV_CC_DEVICE_INFO));
                if (device.nTLayerType == MyCamera.MV_GIGE_DEVICE)
                {
                    MyCamera.MV_GIGE_DEVICE_INFO gigeInfo = (MyCamera.MV_GIGE_DEVICE_INFO)MyCamera.ByteToStruct(device.SpecialInfo.stGigEInfo, typeof(MyCamera.MV_GIGE_DEVICE_INFO));

                    if (gigeInfo.chUserDefinedName != "")
                    {
                        cbDeviceList.Add("GEV: " + gigeInfo.chUserDefinedName + " (" + gigeInfo.chSerialNumber + ")");
                    }
                    else
                    {
                        cbDeviceList.Add("GEV: " + gigeInfo.chManufacturerName + " " + gigeInfo.chModelName + " (" + gigeInfo.chSerialNumber + ")");
                    }
                }
                else if (device.nTLayerType == MyCamera.MV_USB_DEVICE)
                {
                    MyCamera.MV_USB3_DEVICE_INFO usbInfo = (MyCamera.MV_USB3_DEVICE_INFO)MyCamera.ByteToStruct(device.SpecialInfo.stUsb3VInfo, typeof(MyCamera.MV_USB3_DEVICE_INFO));
                    if (usbInfo.chUserDefinedName != "")
                    {
                        cbDeviceList.Add("U3V: " + usbInfo.chUserDefinedName + " (" + usbInfo.chSerialNumber + ")");
                    }
                    else
                    {