WP8_(windows phone环境下)上传文件从C#到php接口

在windows phone环境下，将手机上的图片上传到服务端(php环境)；

注意事项：在上传的地方，头文件中name，例如name= img，则在php服务端处理时

，需要约定好 存取一致 php:$_FILES['img']['name']，如若两端的name不相同则服务端无法正确获取上传的文件；

public class UploadSrv
 {
     #region 选择图片

     /// <summary>
     /// 打开照相机
     /// </summary>
     public void OpenCamera()
     {
         CameraCaptureTask cameraCapture = new CameraCaptureTask();
         cameraCapture.Completed += photoChooser_Completed;
         cameraCapture.Show();
     }

     /// <summary>
     /// 选择图片
     /// </summary>
     public void ChooseImage()
     {
         PhotoChooserTask photoChooser = new PhotoChooserTask();
         photoChooser.Completed += photoChooser_Completed;
         photoChooser.Show();
     }

     void photoChooser_Completed(object sender, PhotoResult e)
     {
         if (e.TaskResult == TaskResult.OK)
         {
             Upload(e.ChosenPhoto);

             //BitmapImage bitmap = new BitmapImage();
             //bitmap.SetSource(e.ChosenPhoto);
             //Image img = new Image();
             //img.Source = bitmap;

             //if (e.ChosenPhoto != null)
             //{
             //    Stream s = UploadFile.Compression(e.ChosenPhoto);
             //    bytepic = StreamToBytes(s);
             //    Encoding myEncoding = Encoding.GetEncoding("utf-8");
             //    strpic = Convert.ToBase64String(bytepic);
             //    ExistsPic = true;
             //}
         }
     }

     #endregion

     /// <summary>
     /// 上传
     /// </summary>
     /// <param name="argStream"></param>
     void Upload(Stream argStream)
     {
         if (!DeviceNetworkInformation.IsNetworkAvailable)
         {
             MessageBox.Show("请开启网络连接..");
             return;
         }
         if (!DeviceNetworkInformation.IsCellularDataEnabled && !DeviceNetworkInformation.IsWiFiEnabled)
         {
             MessageBox.Show("请开启网络连接...");
             return;
         }

         byte[] bytes = new byte[argStream.Length];

         argStream.Seek(0, SeekOrigin.Begin);

         while (argStream.Read(bytes, 0, bytes.Length) > 0) ;

         string fileName = Constant.Mac + ".png";//此处指定了上传文件名 ,Constant.Mac是自己定义的常量


         Dictionary<string, object> postParameters = new Dictionary<string, object>();
         string contentType = "multipart/form-data";//"image/jpeg";//"multipart/form-data";//"application/octetstream";//"image/jpeg";//"multipart/form-data";
         FileParameter param = new FileParameter(bytes, fileName, contentType);
         postParameters.Add(fileName, param);

         HttpMultipartFormRequest req = new HttpMultipartFormRequest();
         req.AsyncHttpRequest(Constant.URL_IMG_UploadPortrait, postParameters, null); //自己定义的常量 Post上传到的网址

         //Sys.ProgressBarBase.Show(true);
     }

     #region 其他方法(未使用)


     /// <summary>
     /// 字节流转换byte
     /// </summary>
     /// <param name="stream"></param>
     /// <returns></returns>
     byte[] StreamToBytes(Stream stream)
     {
         byte[] bytes = new byte[stream.Length];
         stream.Read(bytes, 0, bytes.Length);
         // 设置当前流的位置为流的开始
         stream.Seek(0, SeekOrigin.Begin);
         return bytes;
     }

     /// <summary>
     /// 压缩图片，只调整质量，不调整分辨率
     /// </summary>
     /// <param name="soucre">图片流</param>
     /// <param name="quality">质量1-100</param>
     Stream Compression(Stream soucre, int quality)
     {
         //var quality = 80;
         soucre.Seek(0, SeekOrigin.Begin);
         var p = quality / 100.0;
         var writeableBitmap = PictureDecoder.DecodeJpeg(soucre);
         var width = writeableBitmap.PixelWidth * p;
         var height = writeableBitmap.PixelHeight * p;
         var outstream = new MemoryStream();
         writeableBitmap.SaveJpeg(outstream, (int)width, (int)height, 0, quality);
         outstream.Seek(0, SeekOrigin.Begin);
         return outstream;
     }

     /// <summary>
     /// 根据文件扩展名获取文件类型
     /// </summary>
     /// <param name="fileName">文件名</param>
     /// <returns></returns>
     string GetContentType(string fileName)
     {
         var fileExt = System.IO.Path.GetExtension(fileName);
         return GetCommonFileContentType(fileExt);
     }
     /// <summary>
     /// 获取通用文件的文件类型
     /// </summary>
     /// <param name="fileExt">文件扩展名.如".jpg",".gif"等</param>
     /// <returns></returns>
     string GetCommonFileContentType(string fileExt)
     {
         switch (fileExt)
         {
             case ".jpg":
             case ".jpeg":
                 return "image/jpeg";
             case ".gif":
                 return "image/gif";
             case ".bmp":
                 return "image/bmp";
             case ".png":
                 return "image/png";
             default:
                 return "application/octetstream";
         }
     }

     #endregion
 }

以下2个类是实际上传文件处理类：

    /// <summary>
    /// 文件类型数据的内容参数
    /// </summary>
    public class FileParameter
    {
        // 文件内容
        public byte[] File { get; set; }
        // 文件名
        public string FileName { get; set; }
        // 文件内容类型
        public string ContentType { get; set; }

        public FileParameter(byte[] file) : this(file, null) { }

        public FileParameter(byte[] file, string filename) : this(file, filename, null) { }

        public FileParameter(byte[] file, string filename, string contentType)
        {
            File = file;
            FileName = filename;
            ContentType = contentType;
        }
    }

    /// <summary>
    /// 文件上传类(数据与文件http请求)
    /// </summary>
    public class HttpMultipartFormRequest
    {
        #region Data Members

        private readonly Encoding DefaultEncoding = Encoding.UTF8;
        private ResponseCallback m_Callback;
        private byte[] m_FormData;

        #endregion

        #region Constructor

        public HttpMultipartFormRequest()
        {
        }

        #endregion

        #region Delegate

        public delegate void ResponseCallback(string msg);

        #endregion

        /// <summary>
        /// 传单个文件(暂不用)
        /// </summary>
        /// <param name="postUri"></param>
        /// <param name="argbytes"></param>
        /// <param name="callback"></param>
        public void AsyncHttpRequest(string postUri, byte[] argbytes, ResponseCallback callback = null)
        {
            // 随机序列，用作防止服务器无法识别数据的起始位置
            string formDataBoundary = String.Format("----------{0:N}", Guid.NewGuid());
            // 设置contentType
            string contentType = "multipart/form-data; boundary=" + formDataBoundary;
            // 将数据转换为byte[]格式
            m_FormData = argbytes;//GetMultipartFormData(postParameters, formDataBoundary);
            // 回调函数
            m_Callback = callback;

            // 创建http对象
            HttpWebRequest request = HttpWebRequest.CreateHttp(new Uri(postUri));
            // 设为post请求
            request.Method = "POST";
            request.ContentType = contentType;
            // 请求写入数据流
            request.BeginGetRequestStream(GetRequestStreamCallback, request);
        }

        /// <summary>
        /// 传多个文件
        /// </summary>
        /// <param name="postUri">请求的URL</param>
        /// <param name="postParameters">[filename,FileParameter]</param>
        /// <param name="callback">回掉函数</param>
        public void AsyncHttpRequest(string postUri, Dictionary<string, object> postParameters, ResponseCallback callback)
        {
            // 随机序列，用作防止服务器无法识别数据的起始位置
            string formDataBoundary = String.Format("----------{0:N}", Guid.NewGuid());
            // 设置contentType
            string contentType = "multipart/form-data; boundary=" + formDataBoundary;
            // 将数据转换为byte[]格式
            m_FormData = GetMultipartFormData(postParameters, formDataBoundary);
            // 回调函数
            m_Callback = callback;

            // 创建http对象
            HttpWebRequest request = HttpWebRequest.CreateHttp(new Uri(postUri));
            // 设为post请求
            request.Method = "POST";
            request.ContentType = contentType;
            // 请求写入数据流
            request.BeginGetRequestStream(GetRequestStreamCallback, request);
        }

        private void GetRequestStreamCallback(IAsyncResult ar)
        {
            HttpWebRequest request = ar.AsyncState as HttpWebRequest;
            using (var postStream = request.EndGetRequestStream(ar))
            {
                postStream.Write(m_FormData, 0, m_FormData.Length);
                postStream.Close();
            }
            request.BeginGetResponse(GetResponseCallback, request);
        }

        private void GetResponseCallback(IAsyncResult ar)
        {
            // 处理Post请求返回的消息
            try
            {
                HttpWebRequest request = ar.AsyncState as HttpWebRequest;
                HttpWebResponse response = request.EndGetResponse(ar) as HttpWebResponse;

                using (StreamReader reader = new StreamReader(response.GetResponseStream(), DBCSEncoding.GetDBCSEncoding("gb2312")))
                {
                    string msg = reader.ReadToEnd();

                    if (m_Callback != null)
                    {
                        m_Callback(msg);
                    }
                }
            }
            catch (Exception e)
            {
                string a = e.ToString();
                if (m_Callback != null)
                {
                    m_Callback(string.Empty);
                }
            }
        }

        private byte[] GetMultipartFormData(Dictionary<string, object> postParameters, string boundary)
        {
            Stream formDataStream = new MemoryStream();
            bool needsCLRF = false;

            foreach (var param in postParameters)
            {
                if (needsCLRF)
                {
                    formDataStream.Write(DefaultEncoding.GetBytes("
"), 0, DefaultEncoding.GetByteCount("
"));
                }
                needsCLRF = true;

                if (param.Value is FileParameter)
                {
                    FileParameter fileToUpload = (FileParameter)param.Value;

                    string header = string.Format("--{0}
Content-Disposition: form-data; name="{1}"; filename="{2}";
Content-Type: {3}

",
                        boundary,
                      "img", // param.Key, //此处如果是请求的php，则需要约定好 存取一致 php:$_FILES['img']['name']
                        fileToUpload.FileName ?? param.Key,
                        fileToUpload.ContentType ?? "application/octet-stream");

                    // 将与文件相关的header数据写到stream中
                    formDataStream.Write(DefaultEncoding.GetBytes(header), 0, DefaultEncoding.GetByteCount(header));
                    // 将文件数据直接写到stream中
                    formDataStream.Write(fileToUpload.File, 0, fileToUpload.File.Length);
                }
                else
                {
                    string postData = string.Format("--{0}
Content-Disposition: form-data; name="{1}"

{2}",
                        boundary,
                        param.Key,
                        param.Value);
                    formDataStream.Write(DefaultEncoding.GetBytes(postData), 0, DefaultEncoding.GetByteCount(postData));
                }
            }

            string tailEnd = "
--" + boundary + "--
";
            formDataStream.Write(DefaultEncoding.GetBytes(tailEnd), 0, DefaultEncoding.GetByteCount(tailEnd));

            // 将Stream数据转换为byte[]格式
            formDataStream.Position = 0;
            byte[] formData = new byte[formDataStream.Length];
            formDataStream.Read(formData, 0, formData.Length);
            formDataStream.Close();

            return formData;
        }
    }

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其他参考资料：

直接运行html,选择上传文件后，点提交，即可上传；

注意：name=“file” id=“file” 要与php服务端的 名字一致；

<html>
<body>

<form action="upload_file.php" method="post" enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="Submit" />
</form>

</body>
</html>

其他参考代码：

http://314858770.iteye.com/blog/720456
http://stackoverflow.com/questions/10124150/send-file-in-post-request-with-windows-phone-7
http://stackoverflow.com/questions/6977615/to-post-image-file-in-windows-phone-7-application
http://chriskoenig.net/2011/08/19/upload-files-from-windows-phone/

关键词： C#上传文件到php

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