Wp7: 调用摄像头拍照并上传图片(完整版)

本例通过webclient上传图片，首先在Mian.xaml.cs中：

private void SelectButton_Click(object sender, RoutedEventArgs e)
        {
            PhotoChooserTask task = new PhotoChooserTask();
            task.Completed += task_Completed;
            task.Show();
        }

        private void task_Completed(object sender, PhotoResult e)
        {
            if (e.TaskResult != TaskResult.OK)
                return;

            const int BLOCK_SIZE = 4096;

            Uri uri = new Uri("http://localhost:13235/WebClientUpLoadHandler.ashx", UriKind.Absolute);

            WebClient wc = new WebClient();
            wc.AllowReadStreamBuffering = true;
            wc.AllowWriteStreamBuffering = true;

            // what to do when write stream is open
            wc.OpenWriteCompleted += (s, args) =>
            {
                using (BinaryReader br = new BinaryReader(e.ChosenPhoto))
                {
                    using (BinaryWriter bw = new BinaryWriter(args.Result))
                    {
                        long bCount = 0;
                        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);
                    }
                }
            };

            // what to do when writing is complete
            wc.WriteStreamClosed += (s, args) =>
            {
                MessageBox.Show("Send Complete");
            };

            // Write to the WebClient
            wc.OpenWriteAsync(uri, "POST");
        }

在asp.net  server端新建一个ashx handler：

    /// <summary>
    ///新建一个ashx类处理上传数据
    /// </summary> 
public class WebClientUpLoadHandler : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            //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 + "\\uploadvoice";
            //目录不存在则新建
            //if (!System.IO.Directory.Exists(uploadFolder))
            //{
            //    System.IO.Directory.CreateDirectory(uploadFolder);
            //}
            System.IO.FileMode fileMode = System.IO.FileMode.Create;

            ////写入文件
            try
            {
                using (System.IO.FileStream fs = new System.IO.FileStream(uploadFolder + "\\" + "name", fileMode, System.IO.FileAccess.Write))
                {
                    fs.Write(bytes, 0, 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;
            }
        }

    }