大华摄像头集成demo及教程

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using NetSDKCS;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace AlarmDemo
{
    public partial class AlarmDemo : Form
    {
        private static fDisConnectCallBack m_DisConnectCallBack;
        private static fHaveReConnectCallBack m_ReConnectCallBack;
        private static fMessCallBackEx m_AlarmCallBack;
        private const int ALARM_START = 1;
        private const int ALARM_STOP = 0;
        private const int ListViewCount = 100;

        private IntPtr m_LoginID = IntPtr.Zero;
        private NET_DEVICEINFO_Ex m_DeviceInfo;
        private bool m_IsListen = false;
        private Int64 m_ID = 1;
        private List m_ManangeAlarmInfo = new List（）;
        private byte[] data;

        public AlarmDemo（）
        {
            InitializeComponent（）;
            this.Load += new EventHandler（AlarmDemo_Load）;
        }

        private void AlarmDemo_Load（object sender EventArgs e）
        {
            m_DisConnectCallBack = new fDisConnectCallBack（DisConnectCallBack）;
            m_ReConnectCallBack = new fHaveReConnectCallBack（ReConnectCallBack）;
            m_AlarmCallBack = new fMessCallBackEx（AlarmCallBackEx）;
            try
            {
                NETClient.Init（m_DisConnectCallBack IntPtr.Zero null）;
                NETClient.SetAutoReconnect（m_ReConnectCallBack IntPtr.Zero）;
                NETClient.SetDVRMessCallBack（m_AlarmCallBack IntPtr.Zero）;
                InitOrLogoutUI（）;
            }
            catch （Exception ex）
            {
                MessageBox.Show（ex.Message）;
                Process.GetCurrentProcess（）.Kill（）;
            }
        }

        private bool AlarmCallBackEx（int lCommand IntPtr lLoginID IntPtr pBuf uint dwBufLen IntPtr pchDVRIP int nDVRPort bool bAlarmAckFlag int nEventID IntPtr dwUser）
        {
            EM_ALARM_TYPE type = （EM_ALARM_TYPE）lCommand;
            switch （type）
            {
                case EM_ALARM_TYPE.ALARM_ALARM_EX:
                case EM_ALARM_TYPE.MOTION_ALARM_EX:
                case EM_ALARM_TYPE.VIDEOLOST_ALARM_EX:
                case EM_ALARM_TYPE.SHELTER_ALARM_EX:
                case EM_ALARM_TYPE.DISKFULL_ALARM_EX:
                case EM_ALARM_TYPE.DISKERROR_ALARM_EX:
                    data = new byte[dwBufLen];
                    Marshal.Copy（pBuf data 0 （int）dwBufLen）;
                    for （int i = 0; i < dwBufLen; i++）
                    {
                        if （data[i] == ALARM_START） // alarm start 报警开始
                        {
                            AlarmInfo info = new AlarmInfo（）;
                            info.AlarmType = type;
                            info.ID = m_ID;