Question

*大家好，我已经尝试使用c＃将文件上传到.net服务器。我只是使用c：/ inetpub / wwwroot作为服务器位置。

我的java代码是，

 public class MainActivity extends Activity {
    InputStream inputStream;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.two);
        ByteArrayOutputStream stream = new ByteArrayOutputStream();

        bitmap.compress(Bitmap.CompressFormat.PNG,90, stream);
        byte[] byte_arr = stream.toByteArray();
        String image_str = Base64.encodeBytes(byte_arr);
        ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
        nameValuePairs.add(new BasicNameValuePair("image",image_str));

        try {
            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost("http://127.0.0.1/AndroidUpload/uploadImage.cs");
            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            HttpResponse response = httpClient.execute(httpPost);
            String the_response_string = convertResponseToString(response);


            Toast.makeText(this, "Response"+the_response_string, Toast.LENGTH_SHORT).show();
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(this,"Error1", Toast.LENGTH_SHORT).show();
        } catch (ClientProtocolException e) {
             //TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(this,"Error2", Toast.LENGTH_SHORT).show();}
        catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(this,"Error3", Toast.LENGTH_SHORT).show();
        }

    }
    public String convertResponseToString(HttpResponse response)throws IllegalStateException,IOException {
        // TODO Auto-generated method stub

        String res = "";
        StringBuffer buffer = new StringBuffer();
        inputStream = response.getEntity().getContent();
        int contentLength = (int) response.getEntity().getContentLength();
        Toast.makeText(this, "ContentLength"+contentLength, Toast.LENGTH_SHORT).show();

        if(contentLength<0){
                    }
        else{
            byte[] data = new byte[512];
            int len = 0;

            try {
                while(-1 != (len=inputStream.read(data))){
                    buffer.append(new String(data,0,len));
                }

                inputStream.close();
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            res = buffer.toString();

            Toast.makeText(this, "Result"+res, Toast.LENGTH_SHORT).show();
        }

        return res;
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

我上传的c＃代码是，

 protected void Page_Init(object sender, EventArgs e)
{
  string vTitle = "";
  string vDesc = "";
  string FilePath = Server.MapPath("/files/two.png");        
  if (!string.IsNullOrEmpty(Request.Form["title"]))
  {
    vTitle = Request.Form["title"];
  }
  if (!string.IsNullOrEmpty(Request.Form["description"]))
  {
    vDesc = Request.Form["description"];
  }

  HttpFileCollection MyFileCollection = Request.Files;
  if (MyFileCollection.Count > 0)
  {
    // Save the File
    MyFileCollection[0].SaveAs(FilePath);
  }
}

运行时，它会抛出IOException。并且文件未上载到该文件夹中。尝试使用相同结果的PHP代码。问题在哪里？

Answer 1

这是一个常见问题。事实上，您应该在iis Web服务器（在您的计算机上）托管您的asp.net Web应用程序并获取您的计算机IP地址（通过cmd中的ipconfig命令），然后将您的IP地址而不是"http://127.0.0.1/AndroidUpload/..."。它可能像"http://192.168.1.2/AndroidUpload/..."

Android模拟器无法理解127.0.0.1（localaddress）

编辑：

我不知道如何使用asp.net web表单上传文件，但如果我是你，我会写一个简单的asp.net mvc应用程序，在控制器中，我声明这样的动作：

[HttpPost]
        public ActionResult UploadItem()
        {
            var httpPostedFileBase = Request.Files[0];
            if (httpPostedFileBase != null && httpPostedFileBase.ContentLength != 0)
            {
                //save file in server and return a string 
        return Content("Ok");
            }
            else
            {
               return Content("Failed")
            }
    }

Answer 2

要从模拟器连接到PC网络服务器，您需要关注Android当前使用的addressing convention。更具体地说，10.0.2.2是您要使用的地址。

还要确保您的AndroidManifest.xml包含Internet使用权限。干杯

文件上传到.net c＃server抛出IOException

2 个答案: