c# 获取海康ISAPI布防 类

获取海康ISAPI布防类的C#代码如下：

using System;
using System.IO;
using System.Net;
using System.Text;
using System.Xml;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;

namespace HikvisionISAPI
{
    public class HikvisionISAPI
    {
        private string _ip;
        private string _port;
        private string _username;
        private string _password;
        private string _sessionID;

        //构造函数
        public HikvisionISAPI(string ip, string port, string username, string password)
        {
            _ip = ip;
            _port = port;
            _username = username;
            _password = password;
            _sessionID = string.Empty;
        }

        //获取登录会话ID
        private void GetSessionID()
        {
            string url = string.Format("https://{0}:{1}/ISAPI/Security/sessionLogin", _ip, _port);

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";

            string postData = string.Format("username={0}&password={1}", _username, _password);
            byte[] data = Encoding.UTF8.GetBytes(postData);
            request.ContentLength = data.Length;

            using (Stream stream = request.GetRequestStream())
            {
                stream.Write(data, 0, data.Length);
            }

            ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(response.GetResponseStream());
            XmlNode node = xmlDoc.SelectSingleNode("//SessionID");

            if (node != null)
            {
                _sessionID = node.InnerText;
            }
        }

        //获取布防状态
        public string GetAlarmStatus(string channelID)
        {
            if (string.IsNullOrEmpty(_sessionID))
            {
                GetSessionID();
            }

            string url = string.Format("https://{0}:{1}/ISAPI/Event/notification/alertStream/{2}", _ip, _port, channelID);

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "GET";
            request.ContentType = "application/xml";
            request.Headers.Add("Authorization", "Session " + _sessionID);

            ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            string responseContent = string.Empty;
            using (Stream stream = response.GetResponseStream())
            {
                StreamReader reader = new StreamReader(stream, Encoding.UTF8);
                responseContent = reader.ReadToEnd();
            }

            return responseContent;
        }

        //检查证书
        private bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            return true;
        }
    }
}

使用方法：

//创建 HikvisionISAPI 实例
HikvisionISAPI hik = new HikvisionISAPI("192.168.1.100", "80", "admin", "12345");

//获取通道ID为1的布防状态
string alarmStatus = hik.GetAlarmStatus("1");

Console.WriteLine(alarmStatus);

需要注意的是，在调用GetSessionID方法时，需要根据实际情况修改ISAPI的登录接口地址。同时，在请求时需要添加Authorization头部，其值为Session+空格+SessionID。另外，在使用GetAlarmStatus方法获取布防状态时，需要将通道ID作为参数传入。