Question

我的代码想要将图片上传到服务器，如下所示，但它总是失败。你知道为什么吗？

   public static void SendRequest(System.Text.StringBuilder sReq, byte[] sbyteData, Action<UpLoadPicData, int> onEventResponse = null, Action onFinally = null)
    {
        WebClient wc = new WebClient();

        wc.OpenWriteCompleted += new OpenWriteCompletedEventHandler(wc_OpenWriteCompleted);
        Uri u = new Uri(sReq.ToString());
        wc.Headers[HttpRequestHeader.ContentLength] = sReq.Length.ToString();
        wc.Headers[HttpRequestHeader.Accept] = "*/*";
        wc.Headers[HttpRequestHeader.ContentType] = "application/octet-stream";

        wc.OpenWriteAsync(u, "POST", sbyteData);
    }

    public static void wc_OpenWriteCompleted(object sender, OpenWriteCompletedEventArgs e)
    {
        if (e.Error == null)
        {
            object[] objArr = e.UserState as object[];
            byte[] fileContent = e.UserState as byte[];

           Stream outputStream = e.Result;
           outputStream.Write(fileContent, 0, fileContent.Length);
           outputStream.Flush();
           outputStream.Close();

        }
    }

Answer 1

void photoChooserTask_Completed(object sender, PhotoResult e)
    {
        if (e.TaskResult == TaskResult.OK)
        {
            System.Windows.Media.Imaging.BitmapImage bmp = new System.Windows.Media.Imaging.BitmapImage();
            bmp.SetSource(e.ChosenPhoto);
            image1.Source = bmp;
            byte[] sbytedata = ReadToEnd(e.ChosenPhoto);
            string s = sbytedata.ToString();
            WebClient wc = new WebClient();
            Uri u = new Uri("url here");
            wc.OpenWriteCompleted+=new OpenWriteCompletedEventHandler(wc_OpenWriteCompleted);
            wc.OpenWriteAsync(u, "POST", sbytedata);

        }
    }
    public static void wc_OpenWriteCompleted(object sender, OpenWriteCompletedEventArgs e)
    {
        if (e.Error == null)
        {
            object[] objArr = e.UserState as object[];
            byte[] fileContent = e.UserState as byte[];

            Stream outputStream = e.Result;
            outputStream.Write(fileContent, 0, fileContent.Length);
            outputStream.Flush();
            outputStream.Close();
            string s = e.Result.ToString(); ;

        }
    }
    public static byte[] ReadToEnd(System.IO.Stream stream)
    {
        long originalPosition = stream.Position;
        stream.Position = 0;

        try
        {
            byte[] readBuffer = new byte[4096];

            int totalBytesRead = 0;
            int bytesRead;

            while ((bytesRead = stream.Read(readBuffer, totalBytesRead, readBuffer.Length - totalBytesRead)) > 0)
            {
                totalBytesRead += bytesRead;

                if (totalBytesRead == readBuffer.Length)
                {
                    int nextByte = stream.ReadByte();
                    if (nextByte != -1)
                    {
                        byte[] temp = new byte[readBuffer.Length * 2];
                        Buffer.BlockCopy(readBuffer, 0, temp, 0, readBuffer.Length);
                        Buffer.SetByte(temp, totalBytesRead, (byte)nextByte);
                        readBuffer = temp;
                        totalBytesRead++;
                    }
                }
            }

            byte[] buffer = readBuffer;
            if (readBuffer.Length != totalBytesRead)
            {
                buffer = new byte[totalBytesRead];
                Buffer.BlockCopy(readBuffer, 0, buffer, 0, totalBytesRead);
            }
            return buffer;
        }
        finally
        {
            stream.Position = originalPosition;
        }
    }

我使用了你的代码...而且它工作了..我还将转换为byte []从图像源到此..图像来自图库

Answer 2

使用WebClient执行此操作将非常棘手（我不确定它是否可能）在手机上。请改用HttpWebRequest。

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Uploading an image using C# and WebRequest?
和
Upload files with HTTPWebrequest (multipart/form-data)

Windows Phone 7如何将图片上传到服务器

2 个答案: