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我似乎无法使用此代码Streamsends API。我一直在互联网上，发现与我正在尝试做的事情有关的信息很少。我正在尝试将文件上传到他们的服务器。任何人都可以看看这个，也许可以帮助我吗？

我不断从 Streamsends 服务器收到 500 错误，他们说这是在 Streamsend 应用程序本身中。有趣的是，如果我在注释掉的底部附近取线

( //request.ContentType = "multipart/form-data";)

并取消注释我收到一个 422 错误，表示数据无效。边界好像有问题。

我对 C# 相当陌生，这是我第一次使用 Streamsends API，因此将不胜感激。

m_Method = "POST"
m_Action = "uploads"
private string StreamSendResponse(string Path, string FileName)
    {
        string sReturn = String.Empty;
        string sLocation = String.Empty;

        string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
        byte[] boundarybytes = Encoding.ASCII.GetBytes(Environment.NewLine + "--" + boundary + Environment.NewLine);

        Uri addy = new Uri(m_URI + m_Action);

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(addy);
        request.ContentType = "multipart/form-data; boundary=" + boundary;           

        request.Method = m_Method;

        request.KeepAlive = true;
        request.Headers.Add("Authorization", "Basic " + Merv.base64Encode(m_ID + ":" + m_Key));

        Stream rs = request.GetRequestStream();

        string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n{1}";
        NameValueCollection nvc = new NameValueCollection();

        foreach (string key in nvc.Keys)
        {
            rs.Write(boundarybytes, 0, boundarybytes.Length);
            string formitem = string.Format(formdataTemplate, key, nvc[key]);
            byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            rs.Write(formitembytes, 0, formitembytes.Length);
        }

        rs.Write(boundarybytes, 0, boundarybytes.Length);

        string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n Content-Type: application/octet-stream\r\n";

        string header = string.Format(headerTemplate, "data", FileName);

        byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
        rs.Write(headerbytes, 0, headerbytes.Length);

        FileStream fileStream = new FileStream(Path + FileName, FileMode.Open, FileAccess.Read);
        byte[] buffer = new byte[4096];
        int bytesRead = 0;
        while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
        {
            rs.Write(buffer, 0, bytesRead);
        }
        fileStream.Close();

        byte[] trailer = System.Text.Encoding.ASCII.GetBytes(Environment.NewLine + "--" + boundary + "--" + Environment.NewLine);

        rs.Write(trailer, 0, trailer.Length);
        rs.Close();

        request.Accept = "application/xml";
        //request.ContentType = "multipart/form-data";

        try
        {
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            StreamReader srResponse = new StreamReader(response.GetResponseStream());
            sLocation = response.Headers["Location"];
            sReturn = srResponse.ReadToEnd().Trim();
        }
        catch (WebException exc)
        {

            StreamReader srResponse = new StreamReader(response.GetResponseStream());
            sReturn = srResponse.ReadToEnd().Trim();
            sLocation = exc.Message;
        }
        if (sReturn == String.Empty)
        {
            sReturn = sLocation;
        }

        return sReturn;
    }
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