一：前言

　　　裝置已經安裝好100UC驅動，裝置能正常工作

二：獲取資料介紹

　　　通過http請求，需要安裝華視的網站服務，我們的資料也來自這個網站的get請求。迴圈get請求來獲取資料，經過我的測試

三：程式碼模組介紹

　　　通過事件註冊，服務端迴圈get請求資料，一旦資料和上次不同就通知呼叫我模組的客戶端。客戶端拿到的身份證資訊實時更新。

四：獲取身份證模組程式碼

    public class IDCardEvent 
    {
        public static bool OpenDevice()
        {
            //string openUrl = ConfigurationManager.AppSettings["OpenDevice"] as string;
 

            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
 
 true; 
        } 
        public static string ReadCard()
        {
            //string readUrl = ConfigurationManager.AppSettings["readcard"].ToString(); 
            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 static 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);
        }

        public event EventHandler<MyEventArgs> IDCardChangeNotify;    

        static IDCardMessage idcard = new IDCardMessage() { certNumber = "" };    
        public void GetIDCard()
        {          
            if (OpenDevice()) 
            {
                CancellationTokenSource cancelTokenSource = new CancellationTokenSource();
                Task.Factory.StartNew(() =>
                {                    
                    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; }
        }
        ~IDCardEvent()
        {
            CloseDevice();   
        }
    }  

五：客戶端呼叫我的模組

        static void Main(string[] args)
        {
            IDCardEvent Evet = new IDCardEvent();
            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());      
        }