【注意事项】
1. 更新设备网络SDK时，SDK开发包【库文件】里的HCNetSDK.dll、HCCore.dll、PlayCtrl.dll、SuperRender.dll、AudioRender.dll、HCNetSDKCom文件夹、ssleay32.dll、libeay32.dll、hlog.dll、hpr.dll、zlib1.dll、log4cxx.properties等文件均要加载到程序里面，【HCNetSDKCom文件夹】（包含里面的功能组件dll库文件）需要和HCNetSDK.dll、HCCore.dll一起加载，放在同一个目录下，且HCNetSDKCom文件夹名不能修改。.
2. 如果自行开发软件不能正常实现相应功能，而且程序没有指定加载的dll库路径，请在程序运行的情况下尝试删除HCNetSDK.dll。如果可以删除，说明程序可能调用到系统盘Windows->System32目录下的dll文件，建议删除或者更新该目录下的相关dll文件；如果不能删除，dll文件右键选择属性确认SDK库版本。
3. 如按上述步骤操作后还是不能实现相应功能，请根据NET_DVR_GetLastError返回的错误号判断原因。
4.适用型号：DS-2CD2D15DWD 2.8MM，DS-2CD6424FWD-20 3.7MM，DS-2CD6425FWD-20 2.8MM B
5.dll和sdk可以上海康官网下载：https://www.hikvision.com/cn/download_61.html
Form1.cs:
using System;using System.Threading.Tasks;using System.Windows.Forms;namespace WindowsFormsApp1{public partial class Form1 : Form{public Form1(){InitializeComponent();init();}public IntPtr PictureDev1Cam { get { return pictureBox1.Handle; } }public IntPtr PictureDev2Cam { get { return pictureBox2.Handle; } }IntPtr Cam1Handle = IntPtr.Zero;IntPtr Cam2Handle = IntPtr.Zero;Cam Camera1 = new Cam();Cam Camera2 = new Cam();static private string Cam1IP = "192.168.1.64";static private string Cam2IP = "192.168.1.61";void init(){Cam1Handle = PictureDev1Cam;Cam2Handle = PictureDev2Cam;}private void ConnectCamera(int whitch){string userName = "admin";string password = "a123456.";int PortCamera = 8000;if (whitch == 1){labelCamera1Status.Text = "摄像头连接中...";Task.Run(() =>{if (!Camera1.ConnectCamera(Cam1IP, PortCamera, userName, password)){this.Invoke((Action)delegate { labelCamera1Status.Text = "摄像头连接失败"; });}else{this.Invoke((Action)delegate { labelCamera1Status.Text = ""; });Camera1.Preview(Cam1Handle);Camera1.AdjustMirrorPara(1);Cam1ReconnectTimer.Stop();}});}else{labelCamera2Status.Text = "摄像头连接中...";Task.Run(() =>{if (!Camera2.ConnectCamera(Cam2IP, PortCamera, userName, password)){this.Invoke((Action)delegate { labelCamera2Status.Text = "摄像头连接失败"; });}else{this.Invoke((Action)delegate { labelCamera2Status.Text = ""; });Camera2.Preview(Cam2Handle);Camera2.AdjustMirrorPara(1);Cam2ReconnectTimer.Stop();}});}}private void Cam1ReconnectTimer_Tick(object sender, EventArgs e){ConnectCamera(1);}private void Cam2ReconnectTimer_Tick(object sender, EventArgs e){ConnectCamera(2);}private void Form1_Load(object sender, EventArgs e){}}}
cam:
using System;using System.IO;using System.Runtime.InteropServices;namespace WindowsFormsApp1{class Cam{private bool initSDK = false;private uint lastErr = 0;private string debugMessage = "";private bool err = false;private Int32 userID = -1;public bool Isconnected { get; private set; }UInt32 dwReturn = 0;Int32 nSize = 0;IntPtr ptrPicCfg;private CHCNetSDK.NET_DVR_CAMERAPARAMCFG_EX camPara = new CHCNetSDK.NET_DVR_CAMERAPARAMCFG_EX();private CHCNetSDK.NET_DVR_DEVICEINFO_V30 DeviceInfo = new CHCNetSDK.NET_DVR_DEVICEINFO_V30();private Int32 realPlayHandle = -1;public bool ConnectCamera(string deviceIP, int port, string userName, string password){initSDK = CHCNetSDK.NET_DVR_Init();if (initSDK == false){lastErr = CHCNetSDK.NET_DVR_GetLastError();debugMessage = "初始化过程失败, 错误码：" + lastErr;err = true;return false;}else{CHCNetSDK.NET_DVR_SetLogToFile(3, Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "SdkLog\\"), true);}CHCNetSDK.NET_DVR_DEVICEINFO_V30 DeviceInfo = new CHCNetSDK.NET_DVR_DEVICEINFO_V30();userID = CHCNetSDK.NET_DVR_Login_V30(deviceIP, port, userName, password, ref DeviceInfo);if (userID < 0){lastErr = CHCNetSDK.NET_DVR_GetLastError();debugMessage = "注册失败, 错误码：" + lastErr;err = true;return false;}Isconnected = true;return true;}public void AdjustMirrorPara(byte type){dwReturn = 0;nSize = Marshal.SizeOf(camPara);ptrPicCfg = Marshal.AllocHGlobal(nSize);Marshal.StructureToPtr(camPara, ptrPicCfg, false);if (CHCNetSDK.NET_DVR_GetDVRConfig(userID, 3368, DeviceInfo.byStartChan, ptrPicCfg, (uint)nSize, ref dwReturn)){camPara = (CHCNetSDK.NET_DVR_CAMERAPARAMCFG_EX)Marshal.PtrToStructure(ptrPicCfg, typeof(CHCNetSDK.NET_DVR_CAMERAPARAMCFG_EX));Marshal.FreeHGlobal(ptrPicCfg);camPara.byMirror = type;ptrPicCfg = Marshal.AllocHGlobal(nSize);Marshal.StructureToPtr(camPara, ptrPicCfg, false);if (!CHCNetSDK.NET_DVR_SetDVRConfig(userID, 3369, DeviceInfo.byStartChan, ptrPicCfg, (uint)nSize)){lastErr = CHCNetSDK.NET_DVR_GetLastError();debugMessage = "设置镜像关闭失败, 错误码：" + lastErr;err = true;}}else{lastErr = CHCNetSDK.NET_DVR_GetLastError();debugMessage = "获取参数失败, 错误码：" + lastErr;err = true;}Marshal.FreeHGlobal(ptrPicCfg);}public void Preview(IntPtr handle){CHCNetSDK.NET_DVR_PREVIEWINFO previewInfo = new CHCNetSDK.NET_DVR_PREVIEWINFO();previewInfo.hPlayWnd = handle;//预览窗口previewInfo.lChannel = 1;//(int)DeviceInfo.byStartChan;//预览的设备通道previewInfo.dwStreamType = 0;//码流类型：0-主码流，1-子码流，2-码流3，3-码流4，以此类推previewInfo.dwLinkMode = 0;//连接方式：0- TCP方式，1- UDP方式，2- 多播方式，3- RTP方式，4-RTP/RTSP，5-RSTP/HTTPpreviewInfo.bBlocked = true; //0- 非阻塞取流，1- 阻塞取流previewInfo.dwDisplayBufNum = 0; //播放库播放缓冲区最大缓冲帧数//CHCNetSDK.REALDATACALLBACK RealData = new CHCNetSDK.REALDATACALLBACK(RealDataCallBack);//预览实时流回调函数IntPtr pUser = new IntPtr();//用户数据//打开预览 Start live viewrealPlayHandle = CHCNetSDK.NET_DVR_RealPlay_V40(userID, ref previewInfo, null/*RealData*/, pUser);if (realPlayHandle < 0){lastErr = CHCNetSDK.NET_DVR_GetLastError();debugMessage = "预览失败, 错误码：" + lastErr; //预览失败，输出错误号err = true;//MessageBox.Show(str);return;}}}}
CHCNetSDK.cs
这个太长，需要的可以上我的github下载，省略，我的账号zyr365
工程文件
bin目录
定时器：
运行结果：
