C# 通过阿里云 API 实现企业营业执照OCR识别

public class Company
{
            public string ResultJson="";
            public string ErrorMessage = "";
            public string angle = "";// : float, #输入图片的角度（顺时针旋转），［0， 90， 180，270］
            public string reg_num = "";// : string, #注册号，没有识别出来时返回"FailInRecognition"
            public string name = "";// : string, #公司名称，没有识别出来时返回"FailInRecognition"
            public string type = "";// : string, #公司类型，没有识别出来时返回"FailInRecognition"
            public string person="";// : string, #公司法人，没有识别出来时返回"FailInRecognition"
            public string establish_date = "";// string, #公司注册日期(例：证件上为"2014年04月16日"，算法返回"20140416")
            public string valid_period = "";//: string, #公司营业期限终止日期(例：证件上为"2014年04月16日至2034年04月15日"，算法返回"20340415")
                                            //    #当前算法将日期格式统一为输出为"年月日"(如"20391130"),并将"长期"表示为"29991231"，若证件上没有营业期限，则默认其为"长期",返回"29991231"。
            public string address = "";// : string, #公司地址，没有识别出来时返回"FailInRecognition"
            public string capital = "";// : string, #注册资本，没有识别出来时返回"FailInRecognition"
            public string business = "";// string, #经营范围，没有识别出来时返回"FailInRecognition"
            public string emblem = "";// : string, #国徽位置［top,left,height,width］，没有识别出来时返回"FailInDetection"
            public string title = "";// : string, #标题位置［top,left,height,width］，没有识别出来时返回"FailInDetection"
            public string stamp = "";// : string, #印章位置［top,left,height,width］，没有识别出来时返回"FailInDetection"
            public string qrcode = "";// : string, #二维码位置［top,left,height,width］，没有识别出来时返回"FailInDetection"
            public string is_gray = "";//: false,   #是否是复印件
            public string success="";// : bool, #识别成功与否 true/false
 
            public void ocr_business_license(string UrlorBase64)
            {
                string host = "https://dm-58.data.aliyun.com";
                string path = "/rest/160601/ocr/ocr_business_license.json";
                string method = "POST";
                String appcode = "您的AppCode";
                String querys = "";
                String bodys = "{\"image\":\""+UrlorBase64+"\"}"; 
                String url = host + path;
                HttpWebRequest httpRequest = null;
                HttpWebResponse httpResponse = null;
 
                if (0 < querys.Length)
                {
                    url = url + "?" + querys;
                }
 
                if (host.Contains("https://"))
                {
                    ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                    httpRequest = (HttpWebRequest)WebRequest.CreateDefault(new Uri(url));
                }
                else
                {
                    httpRequest = (HttpWebRequest)WebRequest.Create(url);
                }
                httpRequest.Method = method;
                httpRequest.Headers.Add("Authorization", "APPCODE " + appcode);
                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)
                {
                    ErrorMessage = ex.Message;
                    httpResponse = (HttpWebResponse)ex.Response;
                    return;
                }
                Stream st = httpResponse.GetResponseStream();
                StreamReader reader = new StreamReader(st, Encoding.GetEncoding("utf-8"));
                ResultJson = (reader.ReadToEnd());
 
                if (ResultJson.IndexOf("\"success\":true") == -1&& ResultJson.IndexOf("\"success\":false")==-1)
                {
                    return;
                }
                Newtonsoft.Json.Linq.JObject jsonObj = Newtonsoft.Json.Linq.JObject.Parse(ResultJson);
                angle = jsonObj["angle"].ToString();
                reg_num = jsonObj["reg_num"].ToString();
               name = jsonObj["name"].ToString();
               type = jsonObj["type"].ToString();
               person = jsonObj["person"].ToString();
               establish_date = jsonObj["establish_date"].ToString();
               valid_period = jsonObj["valid_period"].ToString();
               capital = jsonObj["capital"].ToString();
               business = jsonObj["business"].ToString();
                emblem = jsonObj["emblem"].ToString();
                title = jsonObj["title"].ToString();
                stamp = jsonObj["stamp"].ToString();
                qrcode = jsonObj["qrcode"].ToString();
                is_gray = jsonObj["is_gray"].ToString();
                success = jsonObj["success"].ToString();
            }
}

string result_base64 = ImgToBase64String("d:\\1.jpg", true);
Company cp = new Company();
cp.ocr_business_license(result_base64);
if (cp.success == "true")
{
    Response.Write("图片的角度：" + cp.angle + "<br>");
    Response.Write("注册号：" + cp.reg_num + "<br>");
    Response.Write("公司名称：" + cp.name + "<br>");
    Response.Write("公司类型：" + cp.type + "<br>");
    Response.Write("公司法人：" + cp.person + "<br>");
    Response.Write("公司注册日期：" + cp.establish_date + "<br>");
    Response.Write("公司营业期限终止日期：" + cp.valid_period + "<br>");
    Response.Write("公司地址：" + cp.bussiness + "<br>");
    Response.Write("注册资本：" + cp.capital + "<br>");
    Response.Write("经营范围：" + cp.bussiness + "<br>");
    Response.Write("国徽位置：" + cp.emblem + "<br>");
    Response.Write("标题位置：" + cp.title + "<br>");
    Response.Write("印章位置：" + cp.stamp + "<br>");
    Response.Write("二维码位置：" + cp.qrcode + "<br>");
    Response.Write("是否是复印件：" + cp.bussiness + "<br>");
}
else
{
    Response.Write("错误信息：" + cp.ErrorMessage + "<br>");
    Response.Write("JSON返回信息：" + cp.ResultJson + "<br>");
}