c# - 价值 我正在尝试使用 android 将图像上传到 C# Web 服务 Web 服务采用以下参数： byte[] data, string strFileName 但每次我运行应用程序！它给了我这个错误：

Question

我正在尝试使用 android 将图像上传到 C# Web 服务

Web 服务采用以下参数：

byte[] data, string strFileName

但每次我运行应用程序！它给了我这个错误：

Value <?xml of type java.lang.String cannot be converted to JSONObject

这是代码：

class ImageUploadTask extends AsyncTask<Void, Void, String> {
    @Override
    protected String doInBackground(Void... unsued) {
        try {

            HttpClient httpClient = new DefaultHttpClient();
            HttpContext localContext = new BasicHttpContext();
            HttpPost httpPost = new HttpPost(
                    "http://192.168.1.100:8080/ScanFiles.asmx?op=vFileUpload");
            MultipartEntity entity = new MultipartEntity(
                    HttpMultipartMode.BROWSER_COMPATIBLE);

            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            bmp.compress(CompressFormat.JPEG, 80, bos);

            byte[] data = bos.toByteArray();

            entity.addPart("fileName", new StringBody(fnameglob));
            entity.addPart("data", new ByteArrayBody(data, "image/jpeg", fnameglob)); 

            httpPost.setEntity(entity);
            HttpResponse response = httpClient.execute(httpPost,
                    localContext);
            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(
                            response.getEntity().getContent(), "iso-8859-1"));

            String sResponse = reader.readLine();
            return sResponse;

        } catch (Exception e) {
            if (dialog.isShowing())
                dialog.dismiss();
            Toast.makeText(getApplicationContext(), e.getMessage(),
                    Toast.LENGTH_LONG).show();
            Log.e(e.getClass().getName(), e.getMessage(), e);
            return null;
        }

        // (null);
    }

有什么建议么？任何帮助都非常可观。

Answer 1

我已经使用以下代码解决了我的问题：

    protected String doInBackground(Void... unsued) {
        try {

            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            bmp.compress(CompressFormat.JPEG, 80, bos);

            byte[] byte_arr = bos.toByteArray();
            String image_str = Base64.encodeBytes(byte_arr);

            ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
            nameValuePairs.add(new BasicNameValuePair("data", image_str));
            nameValuePairs.add(new BasicNameValuePair("strFileName",
                    fnameglob));

            try {
                HttpClient httpclient = new DefaultHttpClient();
                HttpPost httppost = new HttpPost(
                        "http://192.168.1.100:1234/ScanFiles.asmx/vFileUpload");
                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                HttpResponse response = httpclient.execute(httppost);

                BufferedReader reader = new BufferedReader(
                        new InputStreamReader(response.getEntity()
                                .getContent(), "UTF-8"));

                String sResponse = reader.readLine();
                return sResponse;

            } catch (Exception e) {
                Log.e("HTTP", "Error in http connection " + e.toString());
            } finally {

            }
        } finally {

        }
        return "done";

        // (null);
    }

这是网络服务代码

  [WebMethod]
    public void vFileUpload(string data, string strFileName)
    {
        try
        {
            string str = data.Length.ToString();
            string sDestinationScannedFiles = ConfigurationManager.AppSettings["DestinationScannedFiles"].ToString();
            //string filePath = Server.MapPath(sDestinationScannedFiles +  strFileName);
            string filePath = sDestinationScannedFiles + strFileName;

            File.WriteAllBytes(filePath, Convert.FromBase64String(data));
        }

如果你想找到 base64 类，你可以在这里找到

谢谢。