如何通过 C# 发布请求上传文件?拥有云

我正在使用ownCloud（开源云），我有一个上传文件的表格发送要上传的 POST 请求的表单.php处理上传的文件。该请求有很多字段，需要发送所有信息和cookie。

我需要开发一个 C# 代码来将文件上传到云。在我看来，最好的方法是提出类似于表单请求的请求。你觉得怎么样？有什么建议吗？

附言我阅读了以下解决方案，但它不起作用。在 c# 中使用 HTTP POST 发送文件http://bytes.com/topic/c-sharp/answers/268661-how-upload-file-via-c-code使用 HTTPWebrequest 上传文件（多部分/表单数据）

谢谢

下面是一些代码：

形式：

<form data-upload-id='1'
id="data-upload-form"
class="file_upload_form"
action="<?php print_unescaped(OCP'Util::linkTo('files', 'ajax/upload.php')); ?>"
method="post"
enctype="multipart/form-data"
target="file_upload_target_1">
<input type="hidden" name="MAX_FILE_SIZE" id="max_upload" value="<?php p($_['uploadMaxFilesize']) ?>">
<input type="hidden" name="requesttoken" value="<?php p($_['requesttoken']) ?>" id="requesttoken">
<input type="hidden" class="max_human_file_size" value="(max <?php p($_['uploadMaxHumanFilesize']); ?>)">
 <input type="hidden" name="dir" value="<?php p($_['dir']) ?>" id="dir">
<input type="file" id="file_upload_start" name='files[]'/>
<a href="#" class="svg"></a>
                </form>

这是我看到的请求的方式：

enter code here
Request URL:http://my-url/owncloud/index.php/apps/files/ajax/upload.php
Request Method:POST
Status Code:200 OK
Request Headersview parsed
POST /owncloud/index.php/apps/files/ajax/upload.php HTTP/1.1
Host: my-url
Connection: keep-alive
Content-Length: 730
Accept: */*
requesttoken: 0bbcd458174e76e139ad
Origin: http://my-url
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryVhC3ZFEhWXiSUZYT
Referer: http://my-url/owncloud/index.php/apps/files
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Cookie: oc_username=tal; oc_token=f24c041e992624d10cabbaa16aa6aeea; oc_remember_login=1; __utma=220528984.2016256779.1375771228.1375771228.1375862096.2; __utmz=220528984.1375771228.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); olfsk=olfsk4827894743066281; hblid=QHgh67nWTyXfpzWe6B1Tj9Z3JM0QBCfA; 510e8a1de6274=eqavm1nikkon6ush7con3o6ar6
Request Payload
------WebKitFormBoundaryVhC3ZFEhWXiSUZYT
Content-Disposition: form-data; name="MAX_FILE_SIZE"
537919488
------WebKitFormBoundaryVhC3ZFEhWXiSUZYT
Content-Disposition: form-data; name="requesttoken"
0bbcd458174e76e139ad
------WebKitFormBoundaryVhC3ZFEhWXiSUZYT
Content-Disposition: form-data; name="dir"
/
------WebKitFormBoundaryVhC3ZFEhWXiSUZYT
Content-Disposition: form-data; name="files[]"; filename="bg.png"
Content-Type: image/png

------WebKitFormBoundaryVhC3ZFEhWXiSUZYT--
Response Headersview parsed
HTTP/1.1 200 OK
Date: Sun, 08 Sep 2013 07:21:02 GMT
Server: Apache/2.2.16 (Debian)
X-Powered-By: PHP/5.3.3-7+squeeze16
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
X-Content-Type-Options: nosniff
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 132
Keep-Alive: timeout=15, max=99
Connection: Keep-Alive
Content-Type: text/plain; charset=utf-8

我试过这段代码

 public static void HttpUploadFile(string url, string file, string paramName, string contentType, NameValueCollection nvc) 
            {

string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
                byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("'r'n--" + boundary + "'r'n");
                HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);
                wr.ContentType = "multipart/form-data; boundary=" + boundary;
                wr.Method = "POST";
                wr.KeepAlive = true;
                wr.Credentials = System.Net.CredentialCache.DefaultCredentials;

                Stream rs = wr.GetRequestStream();
                string formdataTemplate = "Content-Disposition: form-data; name='"{0}'"'r'n'r'n{1}";
                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'nContent-Type: {2}'r'n'r'n";
                string header = string.Format(headerTemplate, paramName, file, contentType);
                byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
                rs.Write(headerbytes, 0, headerbytes.Length);
                FileStream fileStream = new FileStream(file, 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("'r'n--" + boundary + "--'r'n");
                rs.Write(trailer, 0, trailer.Length);   
                //StreamReader reader3 = new StreamReader(rs);
                rs.Close();


                WebResponse wresp = null;
                try 
                {
                    wresp = wr.GetResponse();
                    Stream stream2 = wresp.GetResponseStream();
                    StreamReader reader2 = new StreamReader(stream2);
                    MessageBox.Show((string.Format("File uploaded, server response is: {0}", reader2.ReadToEnd())));
                    Debug.WriteLine(string.Format("File uploaded, server response is: {0}", reader2.ReadToEnd()));
                } 
                catch(Exception ex) 
                {
                    Debug.WriteLine("Error uploading file", ex);
                    if(wresp != null) 
                    {
                        wresp.Close();
                        wresp = null;
                    }
                } 
                finally
                {
                    wr = null;
                }
            }

调用函数：

NameValueCollection nvc = new NameValueCollection();
                nvc.Add("id", "TTR");
        nvc.Add("btn-submit-photo", "Upload");
        FilesClass.HttpUploadFile("http://192.168.49.108/owncloud/index.php/apps/files/ajax/upload.php", @"C:'t.txt", "files[]", "text/plain", nvc);

来自服务器的响应是{"data"：{"message"："身份验证错误"}，"状态"："错误"}这意味着我被上传拒绝了.php也许我需要发送饼干？