一：前言

　　　設備已經安裝好100UC的USB驅動，設備能正常工作

二：獲取數據介紹

　　　通過http請求，需要安裝華視的網站服務，因此我會在請求服務之前檢查改服務是否存在，我們的數據也來自這個網站的get請求。循環get請求來獲取數據，經過我的測試2秒一次循環比較合適。

三：代碼模塊介紹

　　　服務端循環get請求數據，通過事件注冊，一旦數據和上次不同就通知調用我模塊的客戶端，也就是發生取身份證動作和放身份證動作時及時發聵給客戶端?？蛻舳四玫降纳矸葑C信息進行實時更新。

四：獲取身份證模塊代碼

public class IDCardNetHttp
    {
        public bool OpenDevice()
        {
            //string openUrl = ConfigurationManager.AppSettings["OpenDevice"];  
            var client = new RestClient("http://127.0.0.1:19196/OpenDevice");
            client.Timeout = -1;
            var request = new RestRequest(Method.GET);
            IRestResponse response = client.Execute(request);

            //Console.WriteLine(response.Content);
            return string.IsNullOrEmpty(response.Content) ? false : true;
        }
        public string ReadCard()
        {
            //string readUrl = ConfigurationManager.AppSettings["readcard"]; 
            var client = new RestClient("http://127.0.0.1:19196/readcard");
            client.Timeout = -1;
            var request = new RestRequest(Method.GET);
            IRestResponse response = client.Execute(request);
            return response.Content;
        }
        public void CloseDevice()
        {
            //string closeUrl = ConfigurationManager.AppSettings["CloseDevice"];    
            var client = new RestClient("http://127.0.0.1:19196/CloseDevice");
            client.Timeout = -1;
            var request = new RestRequest(Method.GET);
            IRestResponse response = client.Execute(request);
            //Console.WriteLine(response.Content);
        } 
        private bool IsExistServer(string serviceName)
        {
            bool result = false;
            ServiceController[] controllers = ServiceController.GetServices(); 
            int nNum = controllers.Length;
            try
            {
                for (int i = 0; i <= (nNum - 1); i++)
                {
                    if ((controllers[i].ServiceName.ToUpper() == serviceName.ToUpper()))
                    {
                        result = true;
                        break;
                    }
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                result = false;
            }
            return result;
        }

        public event EventHandler<MyEventArgs> IDCardChangeNotify;        
        public void GetIDCard()   
        {
            if (IsExistServer("華視電子身份證讀卡器服務"))
            {
                if (OpenDevice())    
                {
                    IDCardMessage idcard = new IDCardMessage() { certNumber = "" };
                    Task.Factory.StartNew(() =>
                    {
                        CancellationTokenSource cancelTokenSource = new CancellationTokenSource();
                        while (!cancelTokenSource.IsCancellationRequested) 
                        {
                            IDCardMessage message = JsonConvert.DeserializeObject<IDCardMessage>(ReadCard());
                            if (idcard.certNumber != message.certNumber)
                            {
                                idcard = message;
                                IDCardChangeNotify(this, new MyEventArgs(idcard));
                            }
                            Thread.Sleep(2000);
                        }
                    });
                }
            }
        }
        public class MyEventArgs : EventArgs
        {
            IDCardMessage _msg;
            public MyEventArgs(IDCardMessage msg)
            {
                this._msg = msg;
            }
            public IDCardMessage Msg
            {
                get { return _msg; }
            }
        }
        public class IDCardMessage
        {
            public string bornDay { get; set; }
            public string certAddress { get; set; }
            public string certNumber { get; set; }
            public string certOrg { get; set; }
            public string certType { get; set; }
            public string effDate { get; set; }
            public string errorMsg { get; set; }
            public string expDate { get; set; }
            public string gender { get; set; }
            public string identityPic { get; set; }
            public string nation { get; set; }
            public string nationCode { get; set; }
            public string partyName { get; set; }
            public string resultFlag { get; set; }
        }
        ~IDCardNetHttp()
        {
            CloseDevice();
        }
    }

五：客戶端調用我的模塊

        static void Main(string[] args)
        {
            IDCardNetHttp Evet = new IDCardNetHttp();
            Evet.IDCardChangeNotify += IDCardCallBack;         

            Evet.GetIDCard();     
            Console.ReadKey();        
        }   
        private static void IDCardCallBack(object sender, IDCardEvent.MyEventArgs e)  
        {
            Console.WriteLine("狀態改變:"+e.Msg.certNumber.ToString());      
        }

總結

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