c#调用百度AI通用文字识别，即时识别图书名

html：

<div style="margin-top:50px">
    <form method="post" action="/home/DoGeneralBasic" enctype="multipart/form-data">
        <table>
            <tr>
                <td>图书封面:</td>
                <td><input type="file" onchange="selectImage(this.files)" accept=""></td>
            </tr>
            <tr>
                <td>书名:</td>
                <td><input type="text" name="bookname" id="bookname" /></td>
            </tr>
            <tr>
                <td>介绍:</td>
                <td>
                    <textarea></textarea>
                </td>
            </tr>
            <tr>
                <td>
                    <input type="submit" value="上传" />
                </td>
            </tr>
        </table>
    </form>
</div>

js:

<script>
    function selectImage(files) {
        let reader = new FileReader();
        let file = files[0];
        reader.readAsDataURL(file);
        reader.onload = function () {
            $.post('/Home/DoGeneral_BasicOnTime', { filecontent: reader.result }, function (result) {
                //把识别的结果放入输入框
                $("#bookname").val(result);
            });
        }
    }
</script>

后台：

 /// <summary>
        /// 通用文字识别即时验证,对应的后台方法
        /// </summary>
        /// <returns></returns>
        public ActionResult DoGeneral_BasicOnTime()
        {
            string base64 = Request.Form["filecontent"];
            #region base64需要把前面的申明去掉(当然前缀这个也可以放在前端处理)
            string base64img = Regex.Replace(base64, "data:image/.*;base64,", "");
            #endregion

            //注意我们token要重写创建一个应用不然没有权限
            string token = "你的token";
            string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic?access_token=" + token;
            string result = BaiduAIBase64Tool2.Invoke(base64img, host);

            GeneralBasicModel generalBasicModel = JsonConvert.DeserializeObject<GeneralBasicModel>(result);

            //给TempData设置内容
            //TempData["generalBasicModel"] = generalBasicModel;
            object content = "";
            if (generalBasicModel.words_result_num == 0)
            {
                content = "没有识别出来任何内容";
                return View();
            }
            if (generalBasicModel.words_result_num == 1) //说明只识别出来一个内容
            {
                content = generalBasicModel.words_result[0].words;
            }
            else //说明只识别出来的内容大于1,合并两个内容
            {
                content = generalBasicModel.words_result[0].words + "." + generalBasicModel.words_result[1].words;
            }

            return Json(content);
        }

调用百度AI工具类：

public class BaiduAIBase64Tool2
    {
        public static string Invoke(string base64, string url)
        {
            //string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/bankcard?access_token=" + "sdfdsf";
            Encoding encoding = Encoding.Default;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "post";
            request.KeepAlive = true;
            // 图片的base64编码
            String str = "image=" + HttpUtility.UrlEncode(base64);
            byte[] buffer = encoding.GetBytes(str);
            request.ContentLength = buffer.Length;
            request.GetRequestStream().Write(buffer, 0, buffer.Length);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            string result = reader.ReadToEnd();
            return result;
        }
    }