Question

我有一个WebRequest，我正在通过Windows CE项目执行。我能够通过正确的方式发送它，我能够看到它正在击中我的WebApi。唯一的问题是，当请求通过时，参数始终为空。

Web API

 [Route("")]
    public IHttpActionResult Post([FromBody] StopInfo stopInfo)
    {
        try
        {
            _scannerService.AddStops(stopInfo);
            return Ok(stopInfo);

        }
        catch (Exception ex)
        {
            //return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex);
            return null;
        }
    }

的WebRequest

private void btnUpload_Click(object sender, EventArgs e)
    {

        StopInfo s1 = new StopInfo();
        s1.ContactName = "Test";
        s1.CompanyName = "Ignite";
        s1.City = "Katy";
        s1.Addr1 = "22908 Mountain View";
        s1.Addr2 = "Suite 300";
        s1.State = "TX";
        s1.Zip = "77449";

        string uploadUrl = txtServerText.Text + "/api/stops";

        string json = JsonConvert.SerializeObject(s1);

        System.Net.WebRequest req = System.Net.WebRequest.Create(uploadUrl);

        req.ContentType = "application/json";
        req.Method = "POST";

        byte[] bytes = System.Text.Encoding.ASCII.GetBytes(json);
        req.ContentLength = bytes.Length;
        System.IO.Stream os = req.GetRequestStream();
        os.Write(bytes, 0, bytes.Length); //Push it out there
        os.Close();
        System.Net.WebResponse resp = req.GetResponse();

        System.IO.StreamReader sr =
              new System.IO.StreamReader(resp.GetResponseStream());

    }

Answer 1

在创建HttpWebRequest对象时尝试使用Cast，如下例所示：

  HttpWebRequest req =    

        (HttpWebRequest)WebRequest.Create((uploadUrl.ToString());

还将以下属性添加到HttpWebRequest对象

req.Timeout = yourWebRequestTimeoutLimit
    req.KeepAlive = False
    req.Accept = "application/json"
    req.Credentials = New NetworkCredential(userName, password)

WebRequest POST json参数在WebAPI上显示为Null

1 个答案: