/// <summary>

         /// 点击上传照片

         /// </summary>

         /// <param name="sender"></param>

         /// <param name="e"></param>

         private void btn_Upload_Click(object sender, RoutedEventArgs e)

         {

             PhotoChooserTask task = new PhotoChooserTask();

             task.PixelHeight = ;

             task.PixelWidth = ;

             task.ShowCamera = true;

             task.Completed += new EventHandler<PhotoResult>(task_Completed);

             task.Show();

         }

         //选择图片完成事件，上传图片操作

         void task_Completed(object sender, PhotoResult e)

         {

             const int BLOCK_SIZE = ;

             //Code参数可以是存入服务器图片的命名

             Uri uri = new Uri("http://localhost:58556/WebClientUpLoadHandler.ashx?Code=123456", UriKind.Absolute);

             WebClient wc = new WebClient();

             wc.AllowReadStreamBuffering = true;

             wc.AllowWriteStreamBuffering = true;

             wc.OpenWriteCompleted += (s, args) =>

             {

                 using (BinaryReader br = new BinaryReader(e.ChosenPhoto))

                 {

                     using (BinaryWriter bw = new BinaryWriter(args.Result))

                     {

                         long bCount = ;

                         long fileSize = e.ChosenPhoto.Length;

                         byte[] bytes = new byte[BLOCK_SIZE];

                         do

                         {

                             bytes = br.ReadBytes(BLOCK_SIZE);

                             bCount += bytes.Length;

                             bw.Write(bytes);

                         } while (bCount < fileSize);

                     }

                 }

             };

             wc.WriteStreamClosed += (s, args) =>

             {

                 MessageBox.Show("上传成功！");

             };

             wc.OpenWriteAsync(uri, "POST");

         }

             string name = context.Request.Params["Code"].ToString();

             //获取从Silverlight客户端传来的信息

             int length = context.Request.ContentLength;

             byte[] bytes = context.Request.BinaryRead(length);

             string uploadFolder = System.AppDomain.CurrentDomain.BaseDirectory + "\\upload";

             //目录不存在则新建

             if (!Directory.Exists(uploadFolder))

             {

                 Directory.CreateDirectory(uploadFolder);

             }

             ////写入文件

             try

             {

                 using (FileStream fs = new FileStream(uploadFolder + "\\" + name+".jpg", FileMode.Create, FileAccess.Write))

                 {

                     fs.Write(bytes, , bytes.Length);

                 }

                 context.Response.Write("服务器端成功");

             }

             catch { context.Response.Write("写入失败"); }

         }

         public bool IsReusable

         {

             get

             {

                 return false;

             }

         }