Develop Bugs

[REQ] Need some info on MDIs in Smart device applications using C#.net

Hi all guys
i am new to C# and .net stuff as i was working with C++ for many years
i want to know that is it possibhle that i can have an MDI Child Form on my main Form and want it to return me some data
like for example i have my main Form has a "settings" button
when i click on "settings" button it should show a small MDI child form which has all the settings and return some data (i'll take care of data but i dont know how to return through a form)
thnx in advance

Well...as far as 'returning' data from the Form, you can't do that as a "return" call because Forms are objects, so the constructor cannot have a return type, however you can have a method that will set a variable in another class (that is public) to the data you want to return ... You can call this method when the form is closing.
I am not entirely sure if you can achieve the 'small form INSIDE another form' without creating your own control. I am not sure how practical/possible this would be, but you can try 1 of the following: extend the Control class (to make a control) or override the OnPaint of a new Form. This way you can define where stuff goes, and what gets drawn onto the screen.

I have used this piece of code in the past, which worked great.
in my example frmA was an MDIchildform of the main (MDIparent)
frmA()
{
public int a=0;
private btn_click(blabla)
{
frmOptions options = new frmOptions(this);
dialog.ShowDialog();
if(dialog.DialogResult == DialogResult.Yes)
{
dosomethingwith(a);
}
else
{
donothingwith(a);
}
}
}
public partial class frmOptions : Form
{
frmA callingform = null;
public frmOptions(frmA x)
{
callingform = x;
}
private void dosomething()
{
callingform.a = value;
}
private void btnSaveSettings_click()
{
this.DialogResult = DialogResult.Yes;
}
private void btnCancelSettings_click()
{
this.DialogResult = DialogResult.No;
}
}
good luck

Advice on strategy

I'm developing a WP7 app, working alongside a Windows (server) application. They are talking with each other using sockets.
As soon as the WP7 app opens, I wish to perform a network scan to find the server application.
I already found out how to get the IP address of the WP7. So let's say I know the server should be somewhere at 192.168.0.*. How do I go about scanning this network?
I tried many things, the last of which is the code below. The problem here is that somehow the TIMEOUT_MILLISECONDS parameter seems to be like playing roulette (tried everything in the range of 100-2000 with different success). In addition, if I sweep the whole subnet like in the code below the phone cannot seem to handle the work. I only get it to work if I set the timeout to 2000 (which is way to long) and by scanning up to 5 IP's in the for-loop, instead of the whole subnet.
Is there anyone that knows a better and much more efficient(!) way to do this?
Code:
string thisIP = "192.168.0.101"; // I normally get this from some other function
string[] arrIP = thisIP.ToString().Split('.');
string IPBase = arrIP[0] + "." + arrIP[1] + "." + arrIP[2] + ".";
//MessageBox.Show(address.ToString());
for (int i = 2; i < 254; i++) {
string IP = IPBase + i;
CheckConnection CheckConn = new CheckConnection();
string resultConnect = CheckConn.Connect(IP, int.Parse(Resource1.port));
if (resultConnect == "Success") {
CheckConn.Send("isAlive");
string result = CheckConn.Receive();
if (result.Contains("yes")) {
// We have found the server
break;
}
}
CheckConn.Close();
}
Code:
public class CheckConnection
{
// Cached Socket object that will be used by each call for the lifetime of this class
Socket _socket = null;
static ManualResetEvent _clientDone = new ManualResetEvent(false);
const int TIMEOUT_MILLISECONDS = 100;
const int MAX_BUFFER_SIZE = 2048;
public string Connect(string hostName, int portNumber) {
string result = string.Empty;
DnsEndPoint hostEntry = new DnsEndPoint(hostName, portNumber);
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
socketEventArg.RemoteEndPoint = hostEntry;
socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e) {
result = e.SocketError.ToString();
_clientDone.Set();
});
_clientDone.Reset();
_socket.ConnectAsync(socketEventArg);
_clientDone.WaitOne(TIMEOUT_MILLISECONDS);
return result;
}
public string Send(string data) {
string response = "Operation Timeout";
if (_socket != null) {
SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
socketEventArg.RemoteEndPoint = _socket.RemoteEndPoint;
socketEventArg.UserToken = null;
socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e) {
response = e.SocketError.ToString();
_clientDone.Set();
});
byte[] payload = Encoding.UTF8.GetBytes(data);
socketEventArg.SetBuffer(payload, 0, payload.Length);
_clientDone.Reset();
_socket.SendAsync(socketEventArg);
// Block the UI thread for a maximum of TIMEOUT_MILLISECONDS seconds.
// If no response comes back within this time then proceed
_clientDone.WaitOne(TIMEOUT_MILLISECONDS);
}
else {
response = "Socket is not initialized";
}
return response;
}
public string Receive() {
string response = "Operation Timeout";
if (_socket != null) {
SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
socketEventArg.RemoteEndPoint = _socket.RemoteEndPoint;
socketEventArg.SetBuffer(new Byte[MAX_BUFFER_SIZE], 0, MAX_BUFFER_SIZE);
socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e) {
if (e.SocketError == SocketError.Success) {
response = Encoding.UTF8.GetString(e.Buffer, e.Offset, e.BytesTransferred);
response = response.Trim('\0');
}
else {
response = e.SocketError.ToString();
}
_clientDone.Set();
});
_clientDone.Reset();
_socket.ReceiveAsync(socketEventArg);
_clientDone.WaitOne(TIMEOUT_MILLISECONDS);
}
else {
response = "Socket is not initialized";
}
return response;
}
public void Close() {
if (_socket != null) {
_socket.Close();
}
}
}

Why you don't know the server IP?
I can't help you with your subnet scanning problem, don't have experience with that corner of WP7 programming.
But I do wonder what kind of arrangement leads to the problem that your app does not know the server address and therefore has to scan for it. Is neither a fixed IP available for your server nor some kind of DNS service up to tell you the current IP?
Even if there are multiple servers running and the phone has the job to somehow decide which one of those is responsible for it, you still could set up some kind of super-server that the phones could ask first which server they should address.
In any way, phones scanning subnets to find servers as some routine app startup action is a bad idea, if you ask me.

Please note that by 'server' I'm just revering to a software that accepts socket connections. This software is installed into a Windows computer that most likely has it's IP from DHCP.
The server software itself could present it's IP address so the end-user can type this address into the client on their WP7. Nice for tech-savvy folks, but that's not how software should be designed in my opinion. People don't need to know what an IP address is and shouldn't be force into typing 'weird numbers'. Properly designed software just have to work instantly and developers (again in my opinion) need to take care of a good design and that includes making things plug-and-play where they can.
Take a look at 'PC Remote' and you will see the kind of easy plug-and-play experience I'm looking for.

Did you check broadcast?
I'm really not network guy, but from Googling I got the impression that people use broadcast instead of IP range scanning for such IP number discovery tasks, and there seems to be a way to do broadcast on WP7 (albeit only using some tricks / hardly documented functionalilty):
E.g. see this thread:
http://stackoverflow.com/questions/8533471/udp-broadcasting-in-windows-phone-7
Which links to this:
http://forums.create.msdn.com/forums/t/88975.aspx
This makes sense to me after reading that broadcast is also the method how a client finds its DHCP server - isn't that the exact same scenario like yours?
Did you already check this way of looking at the problem, or maybe rule it out already for some reason?

It's better if you use a multicast group to send/receive packages. I had way better experience with it than using the Broadcast IP.
You need to join the multicast group with the phone and with the server app. I know there are multicast classes but I found it easier and mor convient to implement it with a socket...
And after you found the server, I'd use a persistent tcp connection which should improve your network performance (udp and wp7 is sometimes really strange...)

Thanks rbrunner7 and chabun for your comments, I appreciate your input!
rbrunner7 said:
Did you already check this way of looking at the problem, or maybe rule it out already for some reason?
Click to expand...
Click to collapse
I did, briefly, but abandoned this path after reading about the physical network equipment (switches etc.) having the need to support broadcasting which might not always be the case.
Anyway, your mentioned post describes 'limited broadcasting', which might be exactly what I should be looking for. Hopefully hardware limitations will not be applicable; I will look into this method further and will let you know how it works out!

roady001 said:
the physical network equipment (switches etc.) having the need to support broadcasting which might not always be the case.
Click to expand...
Click to collapse
I had the same doubts about that as it's also the case for multicasting. Most modern equipement supports it though and you can always provide the possibility to manually enter the server ip if you can't discover one via multicast/broadcast

How to debug phonegap android

Check out the easiest phone gap application debuging.
"use strict";
function init() {
console.log("init...");
document.addEventListener("deviceready", startUp, false);
}
function startUp() {
console.log("startup");
$("#takePictureButton").on("touchstart", function(e) {
navigator.camera.getPicture(camSuccess, camError, {quality: 25, destinationType: Camera.DestinationType.FILE_URI});
});
function camError(e) {
console.log("Camera Error");
console.log(JSON.stringify(e));
}
function camSuccess(picuri) {
console.log("Camera Success");
console.log(picuri);
$("#result").attr("src", picuri);

However console.log() will show in Eclipse log, you may have check Weinre tool
http://people.apache.org/~pmuellr/weinre/docs/latest/UserInterface.html - it offers much more, works as a clone of Chrome Developer Tools (minus breakpoints)
For iPhone there is a native solution (if you have Safari on Mac) - http://webdesign.tutsplus.com/tutor...p-using-web-inspector-to-debug-mobile-safari/
For Android it's https://developers.google.com/chrome-developer-tools/docs/remote-debugging?hl=pl

Another good option I'm using in my native app and plan to run in my Phonegap port is Bugsense. Check it out. Its easy to set up and works well.

Heart Sensor/Passive Wellness sensor

Hello dear forum members,
As far as I know , moto360 doesn't have a sensor of type : TYPE_HEART_RATE, it's called passive wellness sensor.
The problem is that this wellness sensor is not giving me any data, as opposed to every other sensor that I've tried (like gravity, accelerometer...)
I've been waiting for more than 5 min but this sensor gives me data only when I start the app.
I've tried sdk20,sdk21,sdk22,sdk23 ... still no result I also have the android.permission.BODY_SENSORS in my manifest
Question : How to get the sensor working, what can I do?
Code:
package com.x.firstapp;
import android.app.Activity;
import android.os.Bundle;
import android.support.wearable.view.WatchViewStub;
import android.util.Log;
import android.widget.Toast;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.view.WindowManager;
public class MainActivity extends Activity implements SensorEventListener {
private SensorManager mSensorManager;
private Sensor mHeartSensor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() {
@Override
public void onLayoutInflated(WatchViewStub stub) {
}
});
// keep watch screen on
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
Toast.makeText(getApplicationContext(), "Hi Oleg", Toast.LENGTH_LONG).show();
mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
mHeartSensor = mSensorManager.getDefaultSensor(65538); //wellness sensor
mSensorManager.registerListener(this, mHeartSensor, SensorManager.SENSOR_DELAY_NORMAL);
}
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == 65538) {
String msg = "" + (int) event.values[0];
Log.d("Main Activity", msg);
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
Log.d("Main Activity", "accuracy : " + accuracy + " sensor : " + sensor.getName());
}
@Override
protected void onStop() {
super.onStop();
mSensorManager.unregisterListener(this);
}
only output out of this "wellness" sensor (only when app starts) :
D/Main Activity: accuracy : 3 sensor : Wellness Passive Sensor
D/Main Activity: 0​
I have also posted this question on stack overflow, but so far - no success.
As soon as I get an answer here I'll spread it on stack overflow as well.
Thank you

Did you ever solve this? This might help.
What version of OS is your device running. For me, on my moto360 gen 1, now running 6.0.1, I have the permission in the manifest, but I MUST request it from the user using the new android M request mechanism, as BODY_SENSORS is labelled as a dangerous permission. Under debug, you can see all the sensors in the list if you get all sensors, but the iteration through them checks granted permissions.
Apparently, if the app is installed as a companion to an on phone app, it inherits the permissions from the device, so you don't need to ask, but a side-loaded app needs to ask.
Having said that, I clearly got a null for the HEART_RATE sensor until I'd requested user permissions. You at least get something.

dazbys said:
Did you ever solve this? This might help.
What version of OS is your device running. For me, on my moto360 gen 1, now running 6.0.1, I have the permission in the manifest, but I MUST request it from the user using the new android M request mechanism, as BODY_SENSORS is labelled as a dangerous permission. Under debug, you can see all the sensors in the list if you get all sensors, but the iteration through them checks granted permissions.
Apparently, if the app is installed as a companion to an on phone app, it inherits the permissions from the device, so you don't need to ask, but a side-loaded app needs to ask.
Having said that, I clearly got a null for the HEART_RATE sensor until I'd requested user permissions. You at least get something.
Click to expand...
Click to collapse
Hello,
It's a year later. I have a 2nd gen Moto 360 Sport. The android version is 6.01.
I am having what sounds like the same problem. Did you ever solve this?
I am using software which I basically copied from the web. When I run the software I get onAccuracyChanged events with accuracy values somewhere between one and three – mostly two and three.
But, I never get onSensorChanged events. I have the BODY_SENSORS permission in the manifest. And on the watch, if I go into Settings-Permissions, I see that the Sensors permission is enabled.
You mention "I MUST request it from the user using the new android M request mechanism". I'm not familiar with this mechanism. Could you explain a little more? I will also search for more information about this.
Do you have any more suggestions? Did you ever get yours working? It seems strange that I get the onAccuracyChanged events, but no onSensorChanged events. Could it possibly be something like the accuracy has to be four or greater in order to get onSensorChanged events?
Thanks,
Barry.
To answer my own question…
Of course it turned out I had a software error - I had assumed one of the event fields was an integer, it was not.
As was stated in the original answer: Be sure to have the BODY_SENSORS permission in the manifest (for both the phone and wearable). Since I am using SDK platform 20 rather than 23, I don't need to follow the android M procedure of requesting permission, but on the watch I did make sure the Settings-Permissions for my app had Sensors enabled.

Get Device Id used by an App

Hi,
I'm trying to hack an old game (it isn't available in the store anymore) for fun and learning purposes. I'm running W10 but the app is targeted for WP7.
The game encrypts all the files it saves with AES, using the Device Unique Id as the key. It gets the DUID with the following code:
Code:
private string DeviceId
{
get
{
if (string.IsNullOrEmpty(this.id))
{
byte[] numArray = (byte[]) DeviceExtendedProperties.GetValue("DeviceUniqueId");
this.id = "";
foreach (byte num in numArray)
this.id += num.ToString("X2");
if (string.IsNullOrEmpty(this.id))
this.id = "0D0FC36982524EBB25E1CA471F32824286B90F47";
}
return this.id;
}
}
The thing is I don't know how to get that ID from outside the app, which might be unique for the device and publisher. I've searched in all the app files in AppData and seems like it doesn't record the ID anywhere.
I've tried for days and considered other approaches with no luck. Ideas? Suggestions? Any help? Thanks.