Check Internet connectivity

Question

User56953 posted

Hi, Can anybody suggest me how to check internet connectivity for both iOS and Android commonly using xamarin forms?

Thanks, sunil

Answer 1

User43 posted

Hi @sunil.8167!

I'm not aware of a solution that works for both right out of the box. You could always use Xamarin.Form's DependencyService to create a simple solution.

On a platform-specific level, there is plenty of code you can use that others have already written that would be of help:

• Android
• iOS

Our community has also created a project called Xamarin.Forms Labs, which also sports a Device service (currently in Beta) that can check internet connectivity.

Also, moving this thread to Xamarin.Forms forum, as this isn't a community topic.

Answer 2

User53502 posted

Just FYI - I had the same question and I went down the Xamarin.Forms Labs route based on the recommendation above.

I was wondering why it wasn't working, and then when I looked at the device-specific libraries, I noticed that they're coded to always return a null for the device.PhoneService.IsNetworkAvailable - so this is not implemented yet it seems!

Answer 3

User2496 posted

@Alex.9530 thanks for the notice, we have that methods implemented to Windows phone but stiil missing some properties on IOS and Android, we gonna fix that, you can follow the issue here:

https://github.com/XForms/Xamarin-Forms-Labs/issues/131

Answer 4

User12403 posted

I pushed in initial implementations for both iOS and Android. If you are working against the GitHub source any help in testing would be welcome. We probably have to implement a separate interface for the network as the phone service is only available on devices with call capabilities and not on tablets with WiFi.

Answer 5

User91133 posted

Hi,

Do the current version of Xamarin.forms has support to check check internet connectivity?

Thanks, Sagar

Answer 6

User83484 posted

Hello,

anybody has worked out solution for this? I am interested in solution for Android, Windows Phone, iOS and both for phones and tablets.

Thanks, Piotr

Answer 7

User51805 posted

hello,

I think I found something that will do the trick if you are using MVVMCross, there is nice plugin here that does the job nicely:

https://github.com/aritchie/acrmvvmcross/tree/master/Acr.MvvmCross.Plugins.Network

Answer 8

User94258 posted

https://github.com/jamesmontemagno/Xamarin.Plugins might be one way to go.

Answer 9

User89714 posted

Be aware that solutions that rely on pinging a remote device may be unreliable if the remote device is configured to not respond to pings, or if firewalls block ICMP messages used by ping.

Answer 10

User188006 posted

Hi All Used this Link for making Dependency service regarding above explained problem http://www.codeproject.com/Tips/870548/Xamarin-forms-Check-network-connectivity-in-iOS-an for this Dependency service need to be created

Answer 11

User188006 posted

and for Windows platform use this

public static bool getIsInternetAccessAvailable() { switch(NetworkInformation.GetInternetConnectionProfile().GetNetworkConnectivityLevel()) { case NetworkConnectivityLevel.InternetAccess: return true; default: return false; } }

Answer 12

User74071 posted

Here is an easy way without any plugins.

        public bool CheckInternetConnection ()
        {
            string CheckUrl = "http://google.com";

            try {
                HttpWebRequest iNetRequest = (HttpWebRequest)WebRequest.Create (CheckUrl);

                iNetRequest.Timeout = 5000;

                WebResponse iNetResponse = iNetRequest.GetResponse ();

                // Console.WriteLine ("...connection established..." + iNetRequest.ToString ());
                iNetResponse.Close ();

                return true;

            } catch (WebException ex) {

                // Console.WriteLine (".....no connection..." + ex.ToString ());

                return false;
            }
        }

returns true, if internet connection was established and false, if not. Works for me! :smile:

Answer 13

User217924 posted

iNetRequest.GetResponse (); here "GetResponse()" is error not find properly.

Answer 14

User217924 posted

*Hi, *

Can u help me regarding network connectivity issue in windows phone xamarin app.

bool isConnected = NetworkInterface.GetIsNetworkAvailable(); this code always return TRUE when internet is connected or disconnect both time bool isConnected = NetworkInterface.GetIsNetworkAvailable(); these returns TRUE.

any else condition where bool isConnected = NetworkInterface.GetIsNetworkAvailable(); this condition will return FALSE then help regarding connectivity manager using in Android.

Please check attached screenshots.

Answer 15

User74071 posted

Hi @BharatJogarana

my sample above is a synchronous method that works in a Shared Project on iOS and Android.

For PCL projects and Windows Phone you need to use asynchronous methods. You could find a sample in Charles Petzold's BookPreview Chapter 20 Page 677.

Look Here .

Answer 16

User85524 posted

`private bool isInternetAviable() {

        try
        {
            Ping myPing = new Ping();
            String host = "google.com";
            byte[] buffer = new byte[32];
            int timeout = 1000;
            PingOptions pingOptions = new PingOptions();
            PingReply reply = myPing.Send(host, timeout, buffer, pingOptions);
            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }

}`

Answer 17

User2112 posted

@giorgilekveishvili Try that on an actual device that is connected to mobile data not WIFI with no data bundles loaded and also no Airtime/money on your account and the Ping still returns true, not false as it should.

Android... I would recommend using:

 public bool isOnline()
        {
            Runtime runtime = Runtime.GetRuntime();
            try
            {
                Java.Lang.Process ipProcess = runtime.Exec("/system/bin/ping -c 1 8.8.8.8");
                int exitValue = ipProcess.WaitFor();
                return (exitValue == 0);
            }
            catch (Java.IO.IOException e) { e.PrintStackTrace(); }
            catch (InterruptedException e) { e.PrintStackTrace(); }

            return false;
        } 

I found these results more accurate.

Permission Required:

<uses-permission android:name="android.permission.INTERNET" />

Source: http://stackoverflow.com/a/27312494

Answer 18

User251387 posted

This returns a bool:

return System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();

Answer 19

User89714 posted

@ChristophThiel @giorgilekveishvili - If you're planning on having users in China, be aware that the Great Firewall of China may block access to Google. You may want to use an alternative if you believe your user is based in mainland China.

@giorgilekveishvili - As per comment earlier on thread, relying on ping can cause issues, as a result of firewalls not allowing some ICMP stuff through, or as a result of servers disabling ping.

Answer 20

User260731 posted

@MattFedorovich It's does not seems to be working. I've used Flight mode.

Answer 21

User308406 posted

Hi @Sunil,

check this out:

public bool CheckInternetConnection () { string CheckUrl = "https://www.google.co.in"; try{ HttpWebRequest iNetRequest = (HttpWebRequest)WebRequest.Create (CheckUrl); iNetRequest.Timeout = 5000; WebResponse iNetResponse = iNetRequest.GetResponse (); iNetResponse.Close (); return true; } catch (WebException ex) { return false; } }

Answer 22

User243044 posted

Dependency Services is best for these type of issue, please check bellow link : https://developer.xamarin.com/guides/xamarin-forms/application-fundamentals/dependency-service/battery-info/

Answer 23

User222315 posted

@ChristophThiel said: Here is an easy way without any plugins.

      public bool CheckInternetConnection ()
      {
          string CheckUrl = "http://google.com";

          try {
              HttpWebRequest iNetRequest = (HttpWebRequest)WebRequest.Create (CheckUrl);

              iNetRequest.Timeout = 5000;

              WebResponse iNetResponse = iNetRequest.GetResponse ();

              // Console.WriteLine ("...connection established..." + iNetRequest.ToString ());
              iNetResponse.Close ();

              return true;

          } catch (WebException ex) {

              // Console.WriteLine (".....no connection..." + ex.ToString ());

              return false;
          }
      }

returns true, if internet connection was established and false, if not. Works for me! :smile:

GetReponse not available in PCL

Answer 24

User74071 posted

@Windyhen In PCL you need to use async methods

Answer 25

User313001 posted

@Christoph Thiel thnks :smile:

Answer 26

User355485 posted

Full guide here :smile: https://youtu.be/Ck9tqaU0DhE

Answer 27

User344289 posted

Following instructions from the above members. Here's what I did so that the app asynchronously keeps checking if the internet is present every five seconds.

`async void CheckInternetConnectionASync() { while (true) { string CheckUrl = "http://google.com";

            try
            {
                HttpWebRequest iNetRequest = (HttpWebRequest)WebRequest.Create(CheckUrl);
                iNetRequest.ContinueTimeout = 5000;
                WebResponse iNetResponse = await iNetRequest.GetResponseAsync();
                iNetResponse.Dispose();

                log.i("Internet connection present.");
            }
            catch (WebException ex)
            {
                log.e("CheckInternetConnectionASync: No internet connection", ex);
                await DisplayAlert("No Internet Connection", "Device seems to have lost internet connection." +
                " Please ensure the tablet has internet connectivity.", "OK");
            }

            await Task.Delay(5000);
        }
    }`

Answer 28

User89714 posted

@BoomShankar said: Following instructions from the above members. Here's what I did so that the app asynchronously keeps checking if the internet is present every five seconds.

Won't work in mainland China whilst the Great Firewall blocks access to Google. If using mobile data, will be clocking up charges. Not being done on a worker thread, so will cause lag on UI thread. Are you really sure you want to do DisplayAlert every 5 seconds (assuming user presses OK) if connecting to URL fails?

Answer 29

User344289 posted

@JohnHardman I removed chunks of code which was specific to the logic I was working with. But this shortened version would do the trick and good call on the DisplayAlert, it shouldn't be there if not handled properly.

Also, Google could be replaced with something similar over there.

Answer 30

User268511 posted

Use the Xamarin.Essentials package for this:

As I cannot post links yet, search for: xamarin essentials connectivity