从移动应用程序上传服务器上的图像

I am working on a mobile application on .net. This is a windows mobile application. I am facing a problem in this application that I wanna upload an image/file to given url/server. Many upload classes is not using like Webclient, WebRequest, WebResponse. I used HttpWebRequest, That is not connecting with server. Please anyone can help me on how to upload the images on given url in windows mobile 6 in .net.

我正在开发.net上的移动应用程序。这是一个Windows移动应用程序。我在这个应用程序中面临一个问题,我想将图像/文件上传到给定的URL /服务器。许多上传类没有像Webclient,WebRequest,WebResponse那样使用。我使用了HttpWebRequest,它没有与服务器连接。请任何人都可以帮助我如何在.net中的Windows Mobile 6中的给定网址上传图像。

Thanks in advance.

提前致谢。

2 个解决方案

#1

Hey take a look at this code for uploading at Image Shack:

嘿,看看这个代码在Image Shack上传:

You can modify it to use with other web site by just using Fiddler to change the web requests

您可以通过使用Fiddler更改Web请求来修改它以与其他网站一起使用

public class Uploader
    {

        public string UploadFileToImageShack(object oFileName)
        {
            try
            {
                string fileName = oFileName as string;
                string contentType = null;
                CookieContainer cookie = new CookieContainer();
                NameValueCollection col = new NameValueCollection();
                col["MAX_FILE_SIZE"] = "3145728";
                col["refer"] = "";
                col["brand"] = "";
                col["optimage"] = "1";
                col["rembar"] = "1";
                col["submit"] = "host it!";
                List<string> l = new List<string>();
                switch (fileName.Substring(fileName.Length - 3, 3))
                {
                    case "jpg":
                        contentType = "image/jpeg";
                        break;
                    case "peg":
                        contentType = "image/jpeg";
                        break;
                    case "gif":
                        contentType = "image/gif";
                        break;
                    case "png":
                        contentType = "image/png";
                        break;
                    case "bmp":
                        contentType = "image/bmp";
                        break;
                    case "tif":
                        contentType = "image/tiff";
                        break;
                    case "iff":
                        contentType = "image/tiff";
                        break;
                    default:
                        contentType = "image/unknown";
                        break;
                }

                string resp;
                col["optsize"] = "resample";
                resp = UploadFileEx(fileName,
                                               "http://www.imageshack.us/index.php",
                                               "fileupload",
                                               contentType,
                                               col,
                                               cookie);
                return resp;


            }
            catch (Exception ex)
            {
                return "";
            }
        }



        public static string UploadFileEx(string uploadfile, string url,
           string fileFormName, string contenttype, System.Collections.Specialized.NameValueCollection querystring,
           CookieContainer cookies)
        {
            if ((fileFormName == null) ||
                (fileFormName.Length == 0))
            {
                fileFormName = "file";
            }

            if ((contenttype == null) ||
                (contenttype.Length == 0))
            {
                contenttype = "application/octet-stream";
            }


            string postdata;
            postdata = "?";
            if (querystring != null)
            {
                foreach (string key in querystring.Keys)
                {
                    postdata += key + "=" + querystring.Get(key) + "&";
                }
            }
            Uri uri = new Uri(url + postdata);


            string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
            HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(uri);
            webrequest.CookieContainer = cookies;
            webrequest.ContentType = "multipart/form-data; boundary=" + boundary;
            webrequest.Method = "POST";


            // Build up the post message header
            StringBuilder sb = new StringBuilder();
            sb.Append("--");
            sb.Append(boundary);
            sb.Append("\r\n");
            sb.Append("Content-Disposition: form-data; name=\"");
            sb.Append(fileFormName);
            sb.Append("\"; filename=\"");
            sb.Append(Path.GetFileName(uploadfile));
            sb.Append("\"");
            sb.Append("\r\n");
            sb.Append("Content-Type: ");
            sb.Append(contenttype);
            sb.Append("\r\n");
            sb.Append("\r\n");

            string postHeader = sb.ToString();
            byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);

            // Build the trailing boundary string as a byte array
            // ensuring the boundary appears on a line by itself
            byte[] boundaryBytes =
                   Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");

            FileStream fileStream = new FileStream(uploadfile,
                                        FileMode.Open, FileAccess.Read);
            long length = postHeaderBytes.Length + fileStream.Length +
                                                   boundaryBytes.Length;
            webrequest.ContentLength = length;

            Stream requestStream = webrequest.GetRequestStream();

            // Write out our post header
            requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);

            // Write out the file contents
            byte[] buffer = new Byte[checked((uint)Math.Min(4096,
                                     (int)fileStream.Length))];
            int bytesRead = 0;
            while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
                requestStream.Write(buffer, 0, bytesRead);

            // Write out the trailing boundary
            requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
            WebResponse responce = webrequest.GetResponse();
            Stream s = responce.GetResponseStream();
            StreamReader sr = new StreamReader(s);

            return sr.ReadToEnd();
        } 


    }

#2

There is example code on CodeProject that reimplements WebClient.UploadFile "with more" using just HttpwebRequest and friends, which at first glance looks like it uses features that are available in the Compact Framework. You could check the code works with the full framework on a PC and use a tool like Fiddler to check what goes over the wire., before then compiling for the Compact Framework.

CodeProject上有一些示例代码,它使用HttpwebRequest和朋友重新实现WebClient.UploadFile“with more”,乍一看它看起来像是使用了Compact Framework中提供的功能。您可以检查代码是否可以在PC上使用完整框架,并使用像Fiddler这样的工具来检查线路上的内容。然后再编译Compact Framework。