对接海康人脸设备ISAPI，我最开始的时候用Apifox 已经测试成功了

下面是我的实现代码

   static async Task PostFace()
   {
       using (var handler = new HttpClientHandler())
       {
           //添加权限认证
           handler.Credentials = new NetworkCredential("admin", "New202311");
           var client = new HttpClient(handler);
           client.DefaultRequestHeaders.Add("User-Agent", "Apifox/1.0.0 (https://apifox.com)");
           client.DefaultRequestHeaders.Add("Accept", "*/*");
           client.DefaultRequestHeaders.Add("Accept-Encoding", "gzip, deflate, br");
           client.DefaultRequestHeaders.Add("Connection", "keep-alive");

           //添加表单数据
           var parameter = new
           {
               faceLibType = "blackFD",
               FDID = "1",
               FPID = "A0087"
           };

           var faceRecordJsonBytes = JsonConvert.SerializeObject(parameter);

           var dataContent = new ByteArrayContent(Encoding.UTF8.GetBytes(faceRecordJsonBytes));
           dataContent.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");

           var filepath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Images/face02.jpeg");
           var imageData = File.ReadAllBytes(filepath);
           var memoryStream = new MemoryStream();
           memoryStream.Write(imageData, 0, imageData.Length);
           memoryStream.Position = 0; // Rewind the MemoryStream
           var imageContent = new ByteArrayContent(imageData);
           imageContent.Headers.ContentType = MediaTypeHeaderValue.Parse("image/jpeg");

           var boundary = $"-----------------------------{Guid.NewGuid()}";

           var form = new MultipartFormDataContent(boundary)
           {
               { dataContent,"FaceDataRecord"},
               { imageContent,"FaceImage","face02.jpeg"}
           };

           HttpResponseMessage responseData =await client.PostAsync("http://111.198.0.160:10011/ISAPI/Intelligent/FDLib/FaceDataRecord?format=json", form);
           var body = await responseData.Content.ReadAsStringAsync();

           Console.WriteLine(body);
       }
   }

但是当我用C# 代码实现的时候就一直报错

{
        "statusCode":   5,
        "statusString": "Invalid Format",
        "subStatusCode":        "badJsonFormat",
        "errorCode":    1342177282,
        "errorMsg":     "badJsonFormat"
}

URL: http://111.198.0.160:10011/ISAPI/Intelligent/FDLib/FaceDataRecord?format=json
接口使用Digest Auth 授权，认证用户名admin 密码New202311
from body 参数
FaceDataRecord：{"faceLibType":"blackFD","FDID":"1","FPID":"A01902"}
FaceImage ：图片二进制

FPID 是工号 测试可以替换成 A01903 、A01904、 A01905 三个

这是我们服务器测试地址 求大佬解决