Web API 如何使用 Content-Type: multipart/form-data 请求正文参数访问？

Question

当我以 JSON 格式从请求正文传递参数时，没有访问 Web api。我的代码：

    public async Task<HttpResponseMessage> Upload([FromBody]AddPhotoBizPrm addPhotoBizPrm)
    {
        json_obj.RESPONSE = new { };
        string images = "";
        if (Request.Content.IsMimeMultipartContent())
        {

            var provider = new MultipartMemoryStreamProvider();
            await Request.Content.ReadAsMultipartAsync(provider);
            foreach (var file in provider.Contents)
            {
                var filename = file.Headers.ContentDisposition.FileName.Trim('\"');
                var buffer = file.ReadAsByteArrayAsync();
                images += filename;
                //Do whatever you want with filename and its binary data.
            }
        }
        json_obj.RESPONSE = images;
        json_obj.MESSAGE = "";
        json_obj.STATUS_CODE = 701;
        return new HttpResponseMessage()
        {
            Content = new StringContent("ok")
        };
    }

我正在从请求正文传递参数：

{
deviceid:"",
rate:2,
review:"",
skuid:123,
userId:875904
}

Answer 1

解决了这个问题。我使用的是 content-type=multipart/form-data 所以我们不能将 json 参数传递给请求正文。所以我们将以数据形式传递参数 deviceid=""&rate=2&review=""&skuid=123&userId=875904

Web API 如何使用 Content-Type: multipart/form-data 请求正文参数访问？

How request body parameter access by Web API using Content-Type: multipart/form-data?

c#

enterprise-library

asp.net-web-api