Question

我正在写一个Android应用程序，必须在wcf webservice上发送图片。我的应用程序可以联系Web服务并为其提供图片。但是，大小不同，我无法在网络服务上打开图片。

编辑：通过更改网络服务部分，我得到了两个完全相同的大小。但是，仍然无法打开它。

Android部分（文件大小20ko）：

File img;
try {
        Log.i("image", "get file");
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);
        Log.i("call", "end build");

        MultipartEntity entity = new MultipartEntity();
        entity.addPart("data", new FileBody(f));

        httppost.setEntity(entity);
        Log.i("call", "call");
        HttpResponse response = httpclient.execute(httppost);
        Log.i("call", "After");

    }
catch (Exception e) {
    Log.i("error cal image", e.toString());
}

编辑： Webservice（文件大小20ko）：

[OperationContract]
[WebInvoke(Method = "POST",
ResponseFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped,
UriTemplate = "picture")]
public void UploadPicture(Stream image)
{
     var ms = new MemoryStream();
        image.CopyTo(ms);
        var streamBytes = ms.ToArray();
        FileStream f = new FileStream("C:\\appicture.jpg", FileMode.OpenOrCreate);
        f.Write(streamBytes, 0, streamBytes.Length);
        f.Close();
        ms.Close();
        image.Close();


}

Answer 1

您以块的形式读取文件，但只写下最后一个块：

// following line is called once, should be called after each read
fileToupload.Write(bytearray, 0, bytearray.Length);

所以试试这样：

/*...*/
do
{
    bytesRead = image.Read(bytearray, 0, bytearray.Length);
    totalBytesRead += bytesRead;
    fileToupload.Write(bytearray, 0, bytesRead);
} while (bytesRead > 0);

fileToupload.Close();
fileToupload.Dispose();
/*...*/

上传文件Web服务，无法打开它

1 个答案: