C# 印刷文字识别-身份证识别

1.阿里免费提供500次识别。需要购买该产品。

2.产品购买成功后，获取appcode值，这个要放代码中的appcode中。

3.识别的图片路径

     public static void Main(string[] args)
        {
            //身份证识别
            // Console.WriteLine("Hello World!");
            String url = "http://dm-51.data.aliyun.com/rest/160601/ocr/ocr_idcard.json";
            String appcode = "自己的AppCode";  
            String img_file = "识别的图片路径"; 

            //如果输入带有inputs, 设置为True，否则设为False
            bool is_old_format = false;

            //如果没有configure字段，config设为''
            //String config = '';
            String config = "{\\\"side\\\":\\\"face\\\"}";

            String method = "POST";

            String querys = "";

            FileStream fs = new FileStream(img_file, FileMode.Open);
            BinaryReader br = new BinaryReader(fs);
            byte[] contentBytes = br.ReadBytes(Convert.ToInt32(fs.Length));
            String base64 = System.Convert.ToBase64String(contentBytes);
            String bodys;
            if (is_old_format)
            {
                bodys = "{\"inputs\" :" +
                                    "[{\"image\" :" +
                                        "{\"dataType\" : 50," +
                                         "\"dataValue\" :\"" + base64 + "\"" +
                                         "}";
                if (config.Length > 0)
                {
                    bodys += ",\"configure\" :" +
                                    "{\"dataType\" : 50," +
                                     "\"dataValue\" : \"" + config + "\"}" +
                                     "}";
                }
                bodys += "]}";
            }
            else
            {
                bodys = "{\"image\":\"" + base64 + "\"";
                if (config.Length > 0)
                {
                    bodys += ",\"configure\" :\"" + config + "\"";
                }
                bodys += "}";
            }
            HttpWebRequest httpRequest = null;
            HttpWebResponse httpResponse = null;

            if (0 < querys.Length)
            {
                url = url + "?" + querys;
            }

            if (url.Contains("https://"))
            {
                ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                //httpRequest 路径
                httpRequest = (HttpWebRequest)WebRequest.CreateDefault(new Uri(url));
            }
            else
            {
                httpRequest = (HttpWebRequest)WebRequest.Create(url);
            }
            httpRequest.Method = method;
            httpRequest.Headers.Add("Authorization", "APPCODE " + appcode);
            //根据API的要求，定义相对应的Content-Type
            httpRequest.ContentType = "application/json; charset=UTF-8";
            if (0 < bodys.Length)
            {
                byte[] data = Encoding.UTF8.GetBytes(bodys);
                using (Stream stream = httpRequest.GetRequestStream())
                {
                    stream.Write(data, 0, data.Length);
                }
            }
            try
            {
                httpResponse = (HttpWebResponse)httpRequest.GetResponse();
            }
            catch (WebException ex)
            {
                httpResponse = (HttpWebResponse)ex.Response;
            }

            if (httpResponse.StatusCode != HttpStatusCode.OK)
            {
                Console.WriteLine("http error code: " + httpResponse.StatusCode);
                Console.WriteLine("error in header: " + httpResponse.GetResponseHeader("X-Ca-Error-Message"));
                Console.WriteLine("error in body: ");
                Stream st = httpResponse.GetResponseStream();
                StreamReader reader = new StreamReader(st, Encoding.GetEncoding("utf-8"));
                Console.WriteLine(reader.ReadToEnd());
            }
            else
            {

                Stream st = httpResponse.GetResponseStream();
                StreamReader reader = new StreamReader(st, Encoding.GetEncoding("utf-8"));
                Console.WriteLine(reader.ReadToEnd());

            }
            Console.WriteLine("\n");
            Console.ReadLine();
        }

        public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            return true;
        }